Summary
Bridges Claude to Unreal Engine 5 through a native C++ plugin that exposes 17 automation tools over a local GraphQL endpoint. You get asset operations (import, duplicate, rename), actor spawning and transforms, PIE session control, Sequencer timeline manipulation, and Niagara particle authoring. The plugin runs inside UE's editor process on port 8091 by default, handling Blueprint graphs, animation state machines, level streaming, and console command execution with safety blocks. Ships as an npm package that talks to the C++ bridge you drop into your project's Plugins folder. Aimed at developers automating repetitive editor tasks or prototyping game logic conversationally instead of clicking through menus. Supports UE 5.0 through 5.7 with graceful degradation when the editor isn't running.
Install to Claude Code
verifiedclaude mcp add unreal-engine-mcp --env LOG_LEVEL=YOUR_LOG_LEVEL --env MCP_ROUTE_STDOUT_LOGS=YOUR_MCP_ROUTE_STDOUT_LOGS --env UE_PROJECT_PATH=YOUR_UE_PROJECT_PATH --env UE_EDITOR_EXE=YOUR_UE_EDITOR_EXE --env UE_SCREENSHOT_DIR=YOUR_UE_SCREENSHOT_DIR --env MCP_AUTOMATION_PORT=YOUR_MCP_AUTOMATION_PORT --env MCP_AUTOMATION_HOST=YOUR_MCP_AUTOMATION_HOST --env MCP_AUTOMATION_ALLOW_NON_LOOPBACK=YOUR_MCP_AUTOMATION_ALLOW_NON_LOOPBACK --env MCP_AUTOMATION_CLIENT_MODE=YOUR_MCP_AUTOMATION_CLIENT_MODE --env MCP_AUTOMATION_USE_TLS=YOUR_MCP_AUTOMATION_USE_TLS --env MCP_CONNECTION_TIMEOUT_MS=YOUR_MCP_CONNECTION_TIMEOUT_MS --env MCP_REQUEST_TIMEOUT_MS=YOUR_MCP_REQUEST_TIMEOUT_MS --env MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTE=YOUR_MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTE --env MCP_AUTOMATION_MAX_AUTOMATION_REQUESTS_PER_MINUTE=YOUR_MCP_AUTOMATION_MAX_AUTOMATION_REQUESTS_PER_MINUTE -- npx -y unreal-engine-mcp-serverRun in your terminal. Replace YOUR_* placeholders with real values; add --scope user to install for every project.
Review the command, arguments, and environment values before installing — MCP servers run with your local permissions.
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Tools
Verified live against the running server on Jun 10, 2026.
verified live23 tools
manage_toolsDynamic MCP tool management. List canonical tools, view category counts, and enable/disable tools or categories at runtime. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: tools, category, params.4 params
Dynamic MCP tool management. List canonical tools, view category counts, and enable/disable tools or categories at runtime. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: tools, category, params.
Parameters* required
toolsarrayTool names to enable/disable
action*stringlist_tools: show canonical tools with status. list_categories: show category counts. enable/disable_tools: toggle specific tools. enable/disable_category: toggle category. get_status: current state. reset: restore defaults.one of
list_tools · list_categories · enable_tools · disable_tools · enable_category · disable_categoryparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
categorystringCategory name to enable/disable (core, world, gameplay, utility, all)
manage_assetCreate/import/manage assets, material graphs, material instances, procedural textures, render targets, and dependency analysis. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: assetPath, directory, classNames, pa...123 params
Create/import/manage assets, material graphs, material instances, procedural textures, render targets, and dependency analysis. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: assetPath, directory, classNames, pa...
Parameters* required
xnumberynumbertagstringName of the tag.
codestringnamestringName identifier.
pathstringPath to a directory.
posXnumberposYnumbersavebooleanSave the asset(s) after the operation.
tagsarraytypestringdepthnumberforcebooleangammanumbergroupstringlimitnumberpathsarrayscalenumberspeednumbervaluevalueGeneric value (any type).
widthnumberaction*stringAction to performone of
list · import · duplicate · duplicate_asset · rename · rename_assetamountnumberconstAnumberconstBnumberdomainstringendPinstringName of the pin.
formatstringheightnumberinputsarraylayersarraylevelsnumbernodeIdstringID of the node.
offsetnumberparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
prefixstringradiusnumberspeedXnumberspeedYnumbersuffixstringchannelstringinBlacknumberinWhitenumberlodBiasnumbernewNamestringNew name for renaming.
nodeIdsarrayoctavesnumberopacitynumberpatternstringpinNamestringName of the pin.
samplesnumberuTilingnumbervTilingnumberlodCountnumbermaxDepthnumbermeshPathstringMesh asset path.
metadataobjectnewWidthnumbernodeTypestringstrengthnumbertwoSidedbooleanassetPathstringAsset path (e.g., /Game/Path/Asset).
blendModestringblendTypestringdirectionstringdirectorystringPath to a directory.
inputNamestringName of the pin.
inputTypestringlayerNamestringnewHeightnumberoperationstringoverwritebooleanOverwrite if the asset/file already exists.
recursivebooleansourcePinstringName of the source pin.
targetPinstringName of the target pin.
assetPathsarrayclassNamesarraydownstreambooleanfolderPathstringPath to a directory.
outputTypestringredTexturestringTexture asset path.
reportTypestringsearchTextstringsourcePathstringSource path for import/move/copy.
baseTexturestringTexture asset path.
blueTexturestringTexture asset path.
curvePointsarraydescriptionstringneverStreambooleanorphansOnlybooleanreplaceTextstringreplacementstringstartNodeIdstringID of the node.
texturePathstringTexture asset path.
blendTexturestringTexture asset path.
defaultValuevalueGeneric value (any type).
filterMethodstringfunctionPathstringAsset path (e.g., /Game/Path/Asset).
greenTexturestringTexture asset path.
instancePathstringAsset path (e.g., /Game/Path/Asset).
materialPathstringMaterial asset path.
packagePathsarrayshadingModelstringsourceNodeIdstringID of the source node.
targetNodeIdstringID of the target node.
textureGroupstringcheckoutFilesbooleandirectoryPathstringPath to a directory.
parameterNamestringName of the parameter.
parameterTypestringsourceTexturestringTexture asset path.
materialDomainstringparentMaterialstringMaterial asset path.
recursivePathsbooleancoordinateIndexnumberdestinationPathstringDestination path for move/copy.
fixupRedirectorsbooleanrecursiveClassesbooleanshowConfirmationbooleanadditionalOutputsarraystreamingPrioritynumbercompressionSettingsstringvirtualTextureStreamingbooleanmanage_blueprintCreate Blueprints and UMG widgets, add SCS/UI components, set defaults, and manipulate Blueprint graphs, bindings, and widget layouts. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, blueprintPath, blueprin...147 params
Create Blueprints and UMG widgets, add SCS/UI components, set defaults, and manipulate Blueprint graphs, bindings, and widget layouts. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, blueprintPath, blueprin...
Parameters* required
xnumberynumbernamestringName identifier.
pathstringDirectory path for asset creation.
posXnumberposYnumbersizenumbertextstringText content.
timenumberKeyframe time.
anglenumberAngle in degrees.
deltanumberSpinbox increment.
scalearrayshearobjectRender shear.
titlestringvaluevalueGeneric value (any type).
widthnumberaction*stringBlueprint actionone of
create · create_blueprint · get_blueprint · get · compile · add_componentfolderstringPath to a directory.
heightnumberinputsarraynodeIdstringID of the node.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
presetstringzOrdernumberZ-order for canvas slot.
newNamestringNew name for renaming.
oldNamestringoptionsarrayCombo box options.
outputsarraypaddingobjectWidget slot padding.
percentnumberProgress bar percentage (0-1).
pinNamestringName of the pin.
stretchstringScale box stretch mode.one of
None · Fill · ScaleToFit · ScaleToFitX · ScaleToFitY · ScaleToFillattachTostringautoWrapbooleanEnable text auto-wrap.
categorystringclippingstringWidget clipping mode.one of
Inherit · ClipToBounds · ClipToBoundsWithoutIntersecting · ClipToBoundsAlways · OnDemanddurationnumberfadeTimenumberFade time in seconds.
fontSizenumberFont size.
gridSizeobjectInventory grid size.
hintTextstringPlaceholder hint text.
isPublicbooleanlinkedTostringlocationarraymaxValuenumberMaximum value.
meshPathstringMesh asset path.
metadataobjectminValuenumberMinimum value.
nodeGuidstringnodeNamestringName of the node.
nodeTypestringplayModestringAnimation play mode.one of
forward · reverse · pingpongpositionobject3D location (x, y, z).
rotationarrayrowCountnumberNumber of rows.
savePathstringPath to save the asset.
slotNamestringName of the slot.
stepSizenumberValue step size.
toNodeIdstringID of the target node.
alignmentobjectWidget alignment (0-1).
anchorMaxobjectMaximum anchor point (0-1).
anchorMinobjectMinimum anchor point (0-1).
brushSizeobjectBrush/image size.
eventNamestringName of the event.
eventTypestringgraphNamestringName of the graph.
inputTypestringText input type.one of
single · multiisCheckedbooleanCheckbox checked state.
isEnabledbooleanWidget enabled state.
isMarqueebooleanProgress bar marquee mode.
loopCountnumberNumber of loops (-1 for infinite).
newParentstringsourcePinstringName of the source pin.
targetPinstringName of the target pin.
timeoutMsnumbertoPinNamestringName of the target pin.
trackTypestringAnimation track type.one of
transform · color · opacity · renderOpacity · materialwrapWidthnumberWrap width for wrap box.
actionPathstringAsset path (e.g., /Game/Path/Asset).
brushColorobjectBorder brush color.
fromNodeIdstringID of the source node.
memberNamestringoperationsarrayparametersarrayparentNamestringparentSlotstringParent slot to add widget to.
propertiesobjectsourceNodestringtargetNodestringvisibilitystringWidget visibility state.one of
Visible · Collapsed · Hidden · HitTestInvisible · SelfHitTestInvisiblewidgetPathstringWidget blueprint path.
columnCountnumberNumber of columns.
fromPinNamestringName of the source pin.
memberClassstringorientationstringWidget orientation.one of
Horizontal · VerticalparentClassstringPath or name of the parent class.
previewSizestringPreview resolution preset.one of
1080p · 720p · mobile · customslotPaddingobjectPadding between uniform grid slots.
targetClassstringtexturePathstringTexture asset path.
translationobjectRender translation.
applyAndSavebooleandefaultValuevalueGeneric value (any type).
functionNamestringName of the function.
isReplicatedbooleanmaterialPathstringMaterial asset path.
promptFormatstringInteraction prompt format.
propertyNamestringName of the property.
segmentCountnumberNumber of radial segments.
settingsTypestringSettings menu type.one of
video · audio · controls · gameplay · allvariableNamestringName of the variable.
variableTypestringVariable type (e.g., Boolean, Float, Integer, Vector, String, Object)
animationNamestringAnimation name.
bindingSourcestringVariable or function name to bind to.
blueprintPathstringBlueprint asset path.
blueprintTypestringPath or name of the parent class.
componentNamestringName of the component.
componentTypestringinputAxisNamestringinterpolationstringKeyframe interpolation.one of
linear · cubic · constantpropertyValuevalueGeneric value (any type).
widthOverridenumberWidth override for size box.
componentClassstringheightOverridenumberHeight override for size box.
selectedOptionstringSelected combo box option.
colorAndOpacityobjectColor and opacity (0-1 values).
customEventNamestringName of the event.
inputActionPathstringAsset path (e.g., /Game/Path/Asset).
minDesiredWidthnumberMinimum desired width.
parentComponentstringshowSpeakerNamebooleanShow speaker name.
innerSlotPaddingobjectInner wrap box slot padding.
minDesiredHeightnumberMinimum desired height.
saveAfterCompilebooleanstretchDirectionstringScale box stretch direction.one of
Both · DownOnly · UpOnlyexplicitWrapWidthbooleanUse explicit wrap width.
onHoveredFunctionstringFunction to call on hover.
includeProgressBarbooleanInclude progress bar.
userSpecifiedScalenumberUser specified scale value.
alwaysShowScrollbarbooleanAlways show scrollbar.
fillColorAndOpacityobjectFill color for progress bar.
minDesiredSlotWidthnumberMinimum slot width.
onUnhoveredFunctionstringFunction to call on unhover.
scrollBarVisibilitystringScroll bar visibility.one of
Visible · Collapsed · AutoinputActionAssetPathstringAsset path (e.g., /Game/Path/Asset).
maxVisibleObjectivesnumberMaximum visible objectives.
minDesiredSlotHeightnumberMinimum slot height.
control_actorSpawn actors, set transforms, enable physics, add components, manage tags, and attach actors. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: actorName, childActor, parentActor, classPath, meshPath, materialPath,...36 params
Spawn actors, set transforms, enable physics, add components, manage tags, and attach actors. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: actorName, childActor, parentActor, classPath, meshPath, materialPath,...
Parameters* required
tagstringName of the tag.
namestringName identifier.
forceobject3D vector.
limitnumberscaleobject3D scale (x, y, z).
valuevalueGeneric value (any type).
action*stringActionone of
spawn · spawn_actor · spawn_blueprint · delete · destroy_actor · delete_by_tagfilterstringoffsetobject3D location (x, y, z).
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
newNamestringNew name for renaming.
visiblebooleanWhether the item/actor is visible.
locationobject3D location (x, y, z).
meshPathstringMesh asset path.
rotationobject3D rotation (pitch, yaw, roll).
actorNamestringName of the actor.
argumentsvalueGeneric value (any type).
classNamestringclassPathstringAsset path (e.g., /Game/Path/Asset).
variablesobjectactorClassstringactorNamesarraychildActorstringName of the child actor (for attach/detach operations).
propertiesobjectparentActorstringName of the parent actor (for attach operations).
functionNamestringName of the function.
materialPathstringMaterial asset path.
materialSlotintegerpropertyNamestringName of the property.
snapshotNamestringallComponentsbooleanblueprintPathstringBlueprint asset path.
componentNamestringName of the component.
componentTypestringmaterialIndexintegercollisionEnabledbooleancontrol_editorStart/stop PIE, control viewport camera, run console commands, take screenshots, simulate input. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: location, rotation, viewMode, enabled, speed, filename, fov, width,...39 params
Start/stop PIE, control viewport camera, run console commands, take screenshots, simulate input. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: location, rotation, viewMode, enabled, speed, filename, fov, width,...
Parameters* required
xnumberynumberidstringfovnumberkeystringmodestringEditor mode for set_editor_mode, or screenshot source: editor_viewport, game_viewport, full_editor_window.
namestringName identifier.
pathstringPath to a directory.
statstringtypestringspeednumberstepsintegerwidthnumberaction*stringEditor actionone of
play · stop · stop_pie · pause · resume · ejectbuttonstringheightnumberparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
commandstringenabledbooleanWhether the item/feature is enabled.
categorystringfilenamestringlocationobject3D location (x, y, z).
metadataobjectrealtimebooleanrotationobject3D rotation (pitch, yaw, roll).
viewModestringactorNamestringName of the actor.
assetPathstringAsset path (e.g., /Game/Path/Asset).
blendTimenumberdeltaTimenumberinputTypestringlevelPathstringLevel asset path.
objectPathstringresolutionstringResolution setting (e.g., 1024x1024).
inputActionstringpreferencesobjectbookmarkNamestringreturnBase64booleanReturn PNG image data as base64 when supported. Defaults to true for full_editor_window and game_viewport modes.
includeMetadatabooleanmanage_levelLoad/save levels, configure streaming, and build lighting. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: levelPath, assetPath, levelPaths, levelName, path, savePath, destinationPath, overwrite, targetPath, expo...35 params
Load/save levels, configure streaming, and build lighting. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: levelPath, assetPath, levelPaths, levelName, path, savePath, destinationPath, overwrite, targetPath, expo...
Parameters* required
namestringName identifier.
pathstringDirectory path for asset creation.
colorarrayRGBA color as an array [r, g, b, a].
action*stringActionone of
load · load_level · save · save_level · save_as · save_level_asparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
newNamestringqualitystringlocationobject3D location (x, y, z).
metadataobjectrotationobject3D rotation (pitch, yaw, roll).
savePathstringPath to save the asset.
templatestringassetPathstringAsset path (e.g., /Game/Path/Asset).
intensitynumberlevelNamestringlevelPathstringLevel asset path.
lightTypestringLight type. Accepts short names (Point), class names (PointLight), or lowercase (point).one of
Directional · Point · Spot · Rect · DirectionalLight · PointLightoverwritebooleanOverwrite if the asset/file already exists.
streamingbooleantimeoutMsnumberexportPathstringExport file path.
levelPathsarrayparentPathstringPath to a directory.
sourcePathstringSource path for import/move/copy.
targetPathstringPath to a directory.
packagePathstringPath to a directory.
parentLevelstringParent level path.
subLevelPathstringLevel asset path.
sublevelPathstringLevel asset path.
shouldBeLoadedbooleandestinationPathstringDestination path for move/copy.
shouldBeVisiblebooleanstreamingMethodstringsaveDirtyPackagesbooleanuseWorldPartitionbooleanbuild_environmentBuild environments: landscapes, foliage, procedural terrain/biomes, lighting setups, spline roads/rivers/fences, and world decoration. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, landscapeName, heightDa...118 params
Build environments: landscapes, foliage, procedural terrain/biomes, lighting setups, spline roads/rivers/fences, and world decoration. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, landscapeName, heightDa...
Parameters* required
hournumbermaxXnumbermaxYnumberminXnumberminYnumbernamestringName identifier.
pathstringPath to a directory.
savebooleanSave the asset(s) after the operation.
seednumbertimenumbertoolstringcountnumbernamesarraysizeXnumbersizeYnumberspeednumberwidthnumberaction*stringActionone of
create_landscape · sculpt · sculpt_landscape · add_foliage · paint_foliage · create_procedural_terrainassetsarrayboundsobjectmethodstringparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
pointsarrayradiusnumberregionobjectazimuthnumberdensitynumberenabledbooleanWhether the item/feature is enabled.
falloffnumbernumLODsnumberqualitystringspacingnumberfilenamestringhardnessnumberlocationobject3D location (x, y, z).
materialstringMaterial asset path.
maxScalenumbermeshPathstringMesh asset path.
minScalenumberpositionobject3D location (x, y, z).
rotationobject3D rotation (pitch, yaw, roll).
settingsobjectstrengthnumbertileSizenumberactorNamestringName of the actor.
actorPathstringamplitudenumbercurvePathstringAsset path (e.g., /Game/Path/Asset).
directionobject3D rotation (pitch, yaw, roll).
elevationnumberintensitynumberlayerNamestringlightTypestringlocationsarrayoperationstringpointTypestringrandomYawbooleanremoveAllbooleanskipFlushbooleansteepnessnumbertimeoutMsnumberassetPathsarrayheightDataarrayoutputPathstringpointIndexnumberpointScaleobject3D scale (x, y, z).
splineTypestringstaticMeshstringMesh asset path.
transformsarrayvolumeNamestringwaveHeightnumberwaveLengthnumberbClosedLoopbooleancubemapPathstringAsset path (e.g., /Game/Path/Asset).
foliageTypestringforwardAxisstringheightScalenumbersectionSizenumbertargetActorstringName of the actor.
cullDistancenumberfoliageTypesarrayleaveTangentobject3D location (x, y, z).
materialPathstringMaterial asset path.
propertyNamestringName of the property.
subdivisionsnumberalignToNormalbooleanalignToSplinebooleanarriveTangentobject3D location (x, y, z).
blueprintPathstringBlueprint asset path.
componentNamestringName of the component.
heightmapPathstringinitialPointsarraylandscapeNamestringlandscapePathstringAsset path (e.g., /Game/Path/Asset).
layerInfoPathstringAsset path (e.g., /Game/Path/Asset).
materialIndexnumbermaxBrightnessnumberminBrightnessnumbernoWeightBlendbooleanpointRotationobject3D rotation (pitch, yaw, roll).
propertyValuevalueGeneric value (any type).
rotationRangeobject3D rotation (pitch, yaw, roll).
updateNormalsbooleanwaterBodyNamestringName of the actor.
componentCountobject2D vector.
randomizeScalebooleanfoliageTypePathstringAsset path (e.g., /Game/Path/Asset).
quadsPerSectionnumberuseRandomOffsetbooleancollisionEnabledbooleancompensationValuenumberrandomOffsetRangenumberrandomizeRotationbooleanskyLightIntensitynumberlandscapeActorPathstringparticleSystemPathstringAsset path (e.g., /Game/Path/Asset).
physicalMaterialPathstringAsset path (e.g., /Game/Path/Asset).
sectionsPerComponentnumberanimation_physicsAuthor animation and physics assets: Animation Blueprints, blend spaces, montages, Control Rig/IK, skeletons, sockets, physics assets, cloth, ragdolls, and vehicles. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action...112 params
Author animation and physics assets: Animation Blueprints, blend spaces, montages, Control Rig/IK, skeletons, sockets, physics assets, cloth, ragdolls, and vehicles. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action...
Parameters* required
yawnumberaxisstringmassnumbernamestringName identifier.
pathstringDirectory path for asset creation.
savebooleanSave the asset(s) after the operation.
timenumberbodyAstringbodyBstringframenumberpitchnumberscaleobject3D scale (x, y, z).
valuevalueGeneric value (any type).
action*stringActionone of
create_animation_blueprint · create_animation_bp · create_anim_blueprint · create_blend_space · create_blend_space_1d · create_blend_space_2dassetsarraycenterobject3D location (x, y, z).
deltasarraylengthnumberlimitsobjectparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
radiusnumbersuffixstringtoStatestringweightsarrayaxisNamestringbodyTypestringboneNamestringName of the bone.
endFramenumberlocationobject3D location (x, y, z).
lodIndexnumbermaxValuenumberminValuenumbernodeNamestringName of the node.
playRatenumberrotationobject3D rotation (pitch, yaw, roll).
savePathstringPath to save the asset.
slotNamestringactorNamestringName of the actor.
artifactsarrayassetPathstringAsset path (e.g., /Game/Path/Asset).
blendTimenumberblendTypestringcacheNamestringcurveNamestringframeRatenumberfromStatestringnumFramesnumberoverwritebooleanOverwrite if the asset/file already exists.
startTimenumberstateNamestringthresholdnumbertoSectionstringboneTracksarraylayerSetuparraymarkerNamestringnotifyNamestringoutputPathstringOutput file or directory path.
socketNamestringName of the socket.
startFramenumbertrackIndexnumberfromSectionstringmachineNamestringmontagePathstringAsset path (e.g., /Game/Path/Asset).
newBoneNamestringName of the bone.
parentClassstringprofileNamestringsampleValuenumbersectionNamestringsourceChainstringtargetChainstringvehicleTypestringassignToMeshbooleanbasePoseTypestringpropertyNamestringName of the property.
rootBoneNamestringName of the bone.
skeletonPathstringAsset path (e.g., /Game/Path/Asset).
animationPathstringAsset path (e.g., /Game/Path/Asset).
basePoseFramenumberblueprintPathstringBlueprint asset path.
forceRootLockbooleanlinearDampingnumberrelativeScaleobject3D scale (x, y, z).
angularDampingnumberattachBoneNamestringName of the bone.
constraintNamestringparentBoneNamestringName of the bone.
removeChildrenbooleansourceBoneNamestringName of the bone.
sourceMeshPathstringMesh asset path.
sourceSkeletonstringAsset path (e.g., /Game/Path/Asset).
targetBoneNamestringName of the bone.
targetMeshPathstringMesh asset path.
targetSkeletonstringAsset path (e.g., /Game/Path/Asset).
dragCoefficientnumbermorphTargetNamestringmorphTargetPathstringAsset path (e.g., /Game/Path/Asset).
simulatePhysicsbooleansourceIKRigPathstringAsset path (e.g., /Game/Path/Asset).
targetIKRigPathstringAsset path (e.g., /Game/Path/Asset).
additiveAnimTypestringcollisionEnabledbooleanenableRootMotionbooleanphysicsAssetNamestringphysicsAssetPathstringPath to physics asset.
relativeLocationobject3D location (x, y, z).
relativeRotationobject3D rotation (pitch, yaw, roll).
skeletalMeshPathstringSkeletal mesh path.
stateMachineNamestringinterpolationTypestringcompileReferencersbooleanforce_rebuild_blend_space: after rebuilding the BS, cascade-compile every AnimBlueprint that references it (via IAssetRegistry referencers). Response returns referencersCompiled count + compiledAnimBlueprints path list. Default true.
rootMotionRootLockstringrebuildBlendParametersbooleanforce_rebuild_blend_space: also trigger PostEditChangeProperty for the BlendParameters UPROPERTY (axis min/max changed). Default false.
system_controlControl the project runtime: profiling, benchmarks, scalability/LOD/Nanite settings, CVars, console commands, Python scripts, UBT, tests, logs, and widgets. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: profile...59 params
Control the project runtime: profiling, benchmarks, scalability/LOD/Nanite settings, CVars, console commands, Python scripts, UBT, tests, logs, and widgets. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: profile...
Parameters* required
keystringcodestringPython code to execute inline
filestringPath to .py file to execute
modestringScreenshot source. editor_viewport captures the active editor viewport; game_viewport captures the PIE/game viewport; full_editor_window captures the full Slate editor window and returns imageBase64 by default.one of
editor_viewport · game_viewport · full_editor_windownamestringName identifier.
pathstringAsset path (e.g., /Game/Path/Asset).
textstringtypestringone of
CPU · GPU · Memory · RenderThread · GameThread · Alllevelnumberpathsarrayscalenumbervaluestringwidthnumberaction*stringActionone of
profile · show_fps · set_quality · screenshot · set_resolution · set_fullscreenactorsarrayfilterstringheightnumbermaxFPSnumberparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
targetstringvolumenumbercommandstringenabledbooleanWhether the item/feature is enabled.
lodBiasnumbermessagestringsectionstringcategorystringcellSizenumberchannelsstringdetailedbooleandurationnumberfilenamestringforceLODnumbermetadataobjectplatformstringpoolSizenumbersavePathstringPath to save the asset.
widgetIdstringwindowedbooleanargumentsstringassetPathstringAsset path (e.g., /Game/Path/Asset).
recursivebooleanPerform the operation recursively.
childClassstringoutputPathstringOutput file or directory path.
parentNamestringresolutionstringResolution setting (e.g., 1024x1024).
widgetPathstringWidget blueprint path.
mergeActorsbooleanpackageNamestringprofileTypestringcategoryNamestringreturnBase64booleanReturn PNG image data as base64 when supported. Defaults to true for full_editor_window and game_viewport screenshot modes.
configurationstringenableBatchingbooleanincludeMetadatabooleanenableInstancingbooleanstreamingDistancenumberboostPlayerLocationbooleanreplaceSourceActorsbooleanmanage_sequenceEdit Level Sequences: add tracks, bind actors, set keyframes, control playback, and record camera. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, actorName, actorNames, frame, value, property, destin...31 params
Edit Level Sequences: add tracks, bind actors, set keyframes, control playback, and record camera. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, actorName, actorNames, frame, value, property, destin...
Parameters* required
endnumbernamestringName identifier.
pathstringAsset path (e.g., /Game/Path/Asset).
solobooleanframenumbermutedbooleanspeednumberstartnumbervalueobjectaction*stringActionone of
create · open · add_camera · add_actor · add_actors · remove_actorslockedbooleanparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
newNamestringNew name for renaming.
endFramenumberloopModestringmetadataobjectpropertystringName of the property.
actorNamestringName of the actor.
classNamestringframeRatestringspawnablebooleanstartTimenumbertrackNamestringtrackTypestringactorNamesarrayresolutionstringstartFramenumberplaybackEndnumberplaybackStartnumberlengthInFramesnumberdestinationPathstringDestination path for move/copy.
inspectInspect any UObject: read/write properties, list components, export snapshots, and query class info. Actions: inspect_cdo (Blueprint CDO properties + all components without spawning an actor; use blueprintPath, optional detailed/componentName/propertyNames), inspect_class (cla...18 params
Inspect any UObject: read/write properties, list components, export snapshots, and query class info. Actions: inspect_cdo (Blueprint CDO properties + all components without spawning an actor; use blueprintPath, optional detailed/componentName/propertyNames), inspect_class (cla...
Parameters* required
tagstringName of the tag.
namestringName identifier.
valuevalueGeneric value (any type).
action*stringActionone of
inspect_object · get_actor_details · get_blueprint_details · get_mesh_details · get_texture_details · get_material_detailsfilterstringparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
detailedbooleanactorNamestringName of the actor.
classNamestringclassPathstringAsset path (e.g., /Game/Path/Asset).
objectPathstringAsset path (e.g., /Game/Path/Asset).
propertyNamestringName of the property.
propertyPathstringsnapshotNamestringblueprintPathstringBlueprint asset path.
componentNamestringName of the component.
propertyNamesarraycomponentNamesarraymanage_audioPlay/stop sounds, add audio components, configure mixes, attenuation, spatial audio, and author Sound Cues/MetaSounds. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, soundPath, location, rotation, volume,...69 params
Play/stop sounds, add audio components, configure mixes, attenuation, spatial audio, and author Sound Cues/MetaSounds. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, soundPath, location, rotation, volume,...
Parameters* required
namestringName identifier.
pathstringDirectory path for asset creation.
savebooleanSave the asset(s) after the operation.
sizeobject3D scale (x, y, z).
pitchnumberaction*stringActionone of
create_sound_cue · play_sound_at_location · play_sound_2d · create_audio_component · create_sound_mix · push_sound_mixenablebooleanparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
volumenumberenabledbooleanWhether the item/feature is enabled.
loopingbooleanWhether to loop.
mixNamestringfadeTimenumberfadeTypestringlocationobject3D location (x, y, z).
nodeTypestringrotationobject3D rotation (pitch, yaw, roll).
wavePathstringPath to SoundWave asset.
actorNamestringName of the actor.
assetPathstringAsset path (e.g., /Game/Path/Asset).
inputNamestringName of the input.
inputTypestringsoundNamestringsoundPathstringSound asset path.
sourcePinstringName of the source pin.
startTimenumbertargetPinstringName of the target pin.
effectTypestringfadeInTimenumberoutputNamestringName of the output.
outputTypestringpropertiesobjectsourceNodestringSource node name.
targetNodestringTarget node name.
windowSizenumberfadeOutTimenumberfalloffModestringinnerRadiusnumberparentClassstringspeakerPathstringAsset path (e.g., /Game/Path/Asset).
analysisTypestringdefaultValuevalueGeneric value (any type).
reverbEffectstringsourceNodeIdstringID of the source node.
targetNodeIdstringID of the target node.
targetVolumenumbercomponentNamestringName of the component.
velocityScalenumbersoundClassNamestringsoundClassPathstringSound class path.
spatializationstringvolumeAdjusternumberattachPointNamestringName of the socket.
attenuationPathstringAsset path (e.g., /Game/Path/Asset).
concurrencyPathstringAsset path (e.g., /Game/Path/Asset).
falloffDistancenumbertargetInputNamestringattenuationShapestringdopplerIntensitynumberenableReverbSendbooleansourceOutputNamestringreverbDistanceMaxnumberreverbDistanceMinnumberreverbWetLevelMaxnumberreverbWetLevelMinnumberocclusionFilterScalenumberocclusionVolumeScalenumberlowPassFilterFrequencynumberocclusionInterpolationTimenumbermanage_geometryCreate procedural meshes using Geometry Script: booleans, deformers, UVs, collision, and LOD generation. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: outputPath, assetPath, name, path, actorName, width, height...74 params
Create procedural meshes using Geometry Script: booleans, deformers, UVs, collision, and LOD generation. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: outputPath, assetPath, name, path, actorName, width, height...
Parameters* required
capbooleanaxisstringAxis for deformation operations.one of
X · Y · ZnamestringName identifier.
pathstringPath to a directory.
anglenumberAngle in degrees.
countnumberdepthnumberDepth value.
scaleobject3D scale (x, y, z).
stepsnumberwidthnumberWidth value.
action*stringGeometry action to performone of
create_box · create_sphere · create_cylinder · create_cone · create_capsule · create_torusamountnumberGeneric amount for operations (bevel size, inset distance, etc.).
centerobject3D location (x, y, z).
heightnumberHeight value.
offsetobject3D location (x, y, z).
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
radiusnumberRadius value.
weightnumberWeight for lattice deformation.
uvScaleobjectUV scale.
distancenumberDistance value.
keepToolbooleanlocationobject3D location (x, y, z).
lodCountnumberNumber of LOD levels to generate.
lodIndexnumberSpecific LOD index to configure.
midpointnumberTexture luminance midpoint for displacement.
numRingsnumberNumber of rings for sphere, torus.
numSidesnumberNumber of sides for cylinder, cone, etc.
numStepsnumberNumber of steps for stairs.
numTurnsnumberNumber of turns for spiral.
positionobject3D location (x, y, z).
rotationobject3D rotation (pitch, yaw, roll).
segmentsnumberNumber of segments for bevel, subdivide.
strengthnumberStrength or weight.
uvOffsetobjectUV offset.
actorNamestringName of the actor.
assetPathstringAsset path (e.g., /Game/Path/Asset).
hullCountnumberNumber of convex hulls for decomposition.
stepDepthnumberDepth of each stair step.
stepWidthnumberWidth of each stair step.
toolActorstringName of the actor.
uvChannelnumberUV channel index (0-7).
dimensionsobject3D dimensions (width, height, depth).
iterationsnumberNumber of iterations for smooth, remesh.
keepInsidebooleanoutputPathstringOutput file or directory path.
stepHeightnumberHeight of each stair step.
heightScalenumberTexture displacement height scale.
innerRadiusnumberInner radius for torus.
screenSizesarrayArray of screen sizes for each LOD.
targetActorstringName of the actor.
texturePathstringTexture asset path.
maxHullCountnumberMaximum hull count for complex collision generation.
maxHullVertsnumberMaximum vertices per hull for complex collision generation.
weldDistancenumberDistance threshold for vertex welding.
collisionTypestringCollision complexity type.one of
Default · Simple · Complex · UseComplexAsSimple · UseSimpleAsComplexdepthSegmentsnumberSegments along depth.
hardEdgeAnglenumberAngle threshold for hard edges (degrees).
hullPrecisionnumberPrecision for convex hull generation (0-1).
trimActorNamestringName of the actor.
widthSegmentsnumberSegments along width.
heightSegmentsnumberSegments along height.
radialSegmentsnumberRadial segments for circular shapes.
splineActorNamestringName of the actor.
targetHullCountnumberTarget hull count for collision simplification.
trianglePercentnumberPercent of triangles to keep for LOD reduction.
recomputeNormalsbooleanreductionPercentnumberPercent of triangles to reduce per LOD.
targetEdgeLengthnumberTarget edge length for remeshing.
latticeResolutionnumberControl lattice resolution for lattice deformation.
recomputeTangentsbooleanmaxVerticesPerHullnumberMaximum vertices per convex hull.
targetTriangleCountnumberTarget triangle count for simplification.
simplificationFactornumberCollision simplification factor.
computeWeightedNormalsbooleanUse area-weighted normals.
manage_pcgCreate, edit, execute, and configure PCG graphs: graph assets, input/sampler/filter/spawner nodes, pin connections, node settings, and partition grid size. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: graphPat...39 params
Create, edit, execute, and configure PCG graphs: graph assets, input/sampler/filter/spawner nodes, pin connections, node settings, and partition grid size. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: graphPat...
Parameters* required
xnumberynumbernamestringName identifier.
pathstringPath to a directory.
posXnumberposYnumbersavebooleanSave the asset(s) after the operation.
waitbooleanforcebooleanscopestringPartition grid target scope.one of
world · componenttitlestringaction*stringPCG graph action to performone of
create_pcg_graph · create_pcg_subgraph · add_pcg_node · connect_pcg_pins · set_pcg_node_settings · add_landscape_data_nodenodeIdstringID of the node.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
gridSizenumbermeshPathstringMesh asset path.
nodeNamestringName of the node.
nodeTypestringPCG node type alias or UPCGSettings class path/name.
settingsobjectNode settings keyed by reflected PCG settings property name.
actorNamestringName of the actor.
assetPathstringAsset path (e.g., /Game/Path/Asset).
classPathstringgraphPathstringPCG graph asset path (e.g., /Game/PCG/PCG_MyGraph).
inputNamestringName of the pin.
overwritebooleanOverwrite if the asset/file already exists.
sourcePinstringName of the source pin.
targetPinstringName of the target pin.
timeoutMsnumberactorClassstringoutputNamestringName of the pin.
texturePathstringTexture asset path.
sourceNodeIdstringID of the source node.
subgraphPathstringPCG subgraph asset path used by subgraph nodes.
targetNodeIdstringID of the target node.
componentNamestringName of the component.
componentPathstringComponent path/name for PCG execution.
settingsClassstringUPCGSettings class path/name for the PCG node.
createComponentbooleanparentGraphPathstringParent PCG graph asset path for subgraph insertion.
manage_effectNiagara particle systems, VFX, debug shapes, and GPU simulations. Create systems, emitters, modules, and control particle effects. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, savePath, assetPath,...77 params
Niagara particle systems, VFX, debug shapes, and GPU simulations. Create systems, emitters, modules, and control particle effects. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, savePath, assetPath,...
Parameters* required
massnumbernamestringName identifier.
pathstringDirectory path for asset creation.
savebooleancolorvalueRGBA color as an array [r,g,b,a] or object {r,g,b,a} depending on action.
resetbooleanshapestringstepsintegervaluevalueGeneric value (any type).
action*stringEffect/Niagara action to perform.one of
particle · niagara · debug_shape · spawn_niagara · create_dynamic_light · create_niagara_systemfilterstringnodeIdstringID of the node.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
presetstringradiusnumbersystemstringAsset path (e.g., /Game/Path/Asset).
densitynumberemitterstringdurationnumberfrictionnumberlifetimenumberlocationobject3D location (x, y, z).
meshPathstringMesh asset path.
savePathstringPath to save the asset.
sizeModestringvelocityobject3D location (x, y, z).
actorNamestringName of the actor.
alignmentstringassetPathstringAsset path (e.g., /Game/Path/Asset).
burstTimenumbercolorModestringdeltaTimenumbereventNamestringName of the event.
eventTypestringforceTypestringintensitynumberlightTypestringshapeTypestringspawnRatenumberstageNamestringtimeoutMsnumberburstCountnumberextinctionnumberfacingModestringmodulePathstringAsset path (e.g., /Game/Path/Asset).
scatteringnumberscriptTypestringsystemNamestringsystemPathstringAsset path (e.g., /Game/Path/Asset).
autoConnectbooleanemitterNamestringemitterPathstringAsset path (e.g., /Game/Path/Asset).
forceVectorobject3D location (x, y, z).
lightRadiusnumberrestitutionnumberuniformSizenumberaccelerationobject3D location (x, y, z).
cameraOffsetnumbereventPayloadarrayNiagara event payload attributes to expose.
materialPathstringMaterial asset path.
spawnOnEventbooleanspawnPerUnitnumbervelocityModestringattachToActorstringName of the actor.
collisionModestringforceStrengthnumberkillConditionstringparameterNamestringName of the parameter.
parameterTypestringsourceBindingstringdieOnCollisionbooleanparameterValuevalueGeneric value (any type).
eventSpawnCountnumberemitterPropertiesobjectfixedBoundsEnabledbooleandeterministicEnabledbooleanstageIterationSourcestringmanage_gasCreate Gameplay Abilities, Effects, Attribute Sets, and Gameplay Cues for ability systems. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, assetPath, blueprintPath, replicationMode, attributeSetPath,...59 params
Create Gameplay Abilities, Effects, Attribute Sets, and Gameplay Cues for ability systems. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, assetPath, blueprintPath, replicationMode, attributeSetPath,...
Parameters* required
namestringName of the asset to create.
pathstringDirectory path for asset creation.
action*stringGAS action to perform.one of
add_ability_system_component · configure_asc · create_attribute_set · add_attribute · set_attribute_base_value · set_attribute_clampingcueTagstringGameplay Cue tag (e.g., GameplayCue.Damage.Fire).
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
periodnumberPeriod for periodic effects.
cuePathstringPath to Gameplay Cue asset.
cueTypestringType of gameplay cue notify.one of
Static · ActortagNamestringName of the tag.
durationnumberDuration in seconds.
maxValuenumberMaximum value for clamping.
minValuenumberMinimum value for clamping.
taskTypestringType of ability task to add.one of
WaitDelay · WaitInputPress · WaitInputRelease · WaitGameplayEvent · WaitTargetData · WaitConfirmCancelaoeRadiusnumberArea of effect radius.
assetPathstringAsset path (e.g., /Game/Path/Asset).
baseValuenumberBase value for attribute.
clampModestringAttribute clamping mode.one of
None · Min · Max · MinMaxdecalPathstringPath to decal material.
soundPathstringSound asset path.
effectPathstringPath to effect asset.
abilityPathstringPath to ability asset.
abilityTagsarrayGameplay tags for this ability.
grantedTagsarrayTags granted while effect is active.
removalTagsarrayTags that cause effect removal.
targetRangenumberMaximum targeting range.
triggerTypestringWhen the cue triggers.one of
OnActive · WhileActive · Executed · OnRemovedefaultValuevalueGeneric value (any type).
durationTypestringEffect duration type.one of
Instant · Infinite · HasDurationimmunityTagsarrayTags that block this effect.
stackingTypestringStacking type for effect.one of
None · AggregateBySource · AggregateByTargetattributeNamestringName of the attribute.
attributeTypestringPredefined attribute type or Custom.one of
Health · MaxHealth · Mana · MaxMana · Stamina · MaxStaminablueprintPathstringBlueprint asset path.
componentNamestringName of the component.
modifierIndexnumbertargetingModestringTargeting mode for ability.one of
None · SingleTarget · AOE · Directional · Ground · ActorPlacementcostEffectPathstringPath to cost Gameplay Effect.
setByCallerTagstringTag for SetByCaller magnitude.
cameraShakePathstringPath to camera shake asset.
replicationModestringASC replication mode.one of
Full · Minimal · MixedstackLimitCountnumberMaximum stack count.
targetAttributestringTarget attribute for modifier.
activationPolicystringWhen the ability activates.one of
OnInputPressed · WhileInputActive · OnSpawn · OnGivenattributeSetPathstringPath to Attribute Set asset.
calculationClassstringUGameplayEffectExecutionCalculation class path.
instancingPolicystringHow the ability is instanced.one of
NonInstanced · InstancedPerActor · InstancedPerExecutionmodifierMagnitudenumberMagnitude of the modifier.
modifierOperationstringModifier operation on attribute.one of
Add · Multiply · Divide · OverridecooldownEffectPathstringPath to cooldown Gameplay Effect.
particleSystemPathstringPath to particle system.
activationBlockedTagsarrayTags that block activation of this ability.
blockAbilitiesWithTagarrayTags of abilities blocked while this is active.
stackExpirationPolicystringWhat happens when stack expires.one of
ClearEntireStack · RemoveSingleStackAndRefreshDuration · RefreshDurationactivationRequiredTagsarrayTags required to activate this ability.
cancelAbilitiesWithTagarrayTags of abilities to cancel when this activates.
stackPeriodResetPolicystringWhen to reset stack period.one of
ResetOnSuccessfulApplication · NeverResetapplicationRequiredTagsarrayTags required to apply this effect.
magnitudeCalculationTypestringHow magnitude is calculated.one of
ScalableFloat · AttributeBased · SetByCaller · CustomCalculationClassstackDurationRefreshPolicystringWhen to refresh stack duration.one of
RefreshOnSuccessfulApplication · NeverRefreshmanage_characterCreate Character Blueprints with movement, locomotion, and animation state machines. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, blueprintPath, parentClass, skeletalMeshPath, animBlueprintPath, ca...67 params
Create Character Blueprints with movement, locomotion, and animation state machines. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, blueprintPath, parentClass, skeletalMeshPath, animBlueprintPath, ca...
Parameters* required
namestringName of the asset to create.
pathstringDirectory path for asset creation.
action*stringCharacter action to perform.one of
create_character_blueprint · configure_capsule_component · configure_mesh_component · configure_camera_component · configure_movement_speeds · configure_jumpmodeIdnumberCustom movement mode ID.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
flySpeednumbermodeNamestringName for custom movement mode.
runSpeednumbercanCrouchbooleanswimSpeednumberwalkSpeednumberairControlnumberclimbSpeednumberjumpHeightnumbermeshOffsetobjectMesh location offset.
slideSpeednumbervaultDepthnumberObstacle depth to check.
crouchSpeednumbercustomSpeednumberparentClassstringParent class for character blueprint.one of
Character · ACharacter · PlayerCharacter · AICharactersprintSpeednumbersurfaceTypestringPhysical surface type.one of
Default · Concrete · Grass · Dirt · Metal · WoodvaultHeightnumberMaximum vault obstacle height.
accelerationnumberclimbableTagstringTag for climbable surfaces.
decelerationnumbergrappleRangenumberMaximum grapple distance.
grappleSpeednumberGrapple pull speed.
gravityScalenumberjumpHoldTimenumberMax hold time for variable jump.
mantleHeightnumberMaximum mantle height.
maxJumpCountnumbermeshRotationobjectMesh rotation offset.
rotationRatenumberwallRunSpeednumberWall running speed.
blueprintPathstringBlueprint asset path.
capsuleRadiusnumberparticleScalenumberslideCooldownnumberslideDurationnumbergroundFrictionnumbernavAgentHeightnumbernavAgentRadiusnumberfootstepEnabledbooleanEnable footstep system.
springArmLengthnumberwallRunDurationnumberMaximum wall run duration.
avoidanceEnabledbooleanEnable AI avoidance.
grappleTargetTagstringTag for grapple targets.
orientToMovementbooleanOrient rotation to movement direction.
skeletalMeshPathstringSkeletal mesh path.
volumeMultipliernumberanimBlueprintPathstringPath to animation blueprint.
capsuleHalfHeightnumberspringArmLagSpeednumberCamera lag speed.
crouchedHalfHeightnumberfootstepSocketLeftstringLeft foot socket name.
brakingDecelerationnumberfootstepSocketRightstringRight foot socket name.
mantleReachDistancenumberForward reach for mantle check.
springArmLagEnabledbooleanEnable camera lag.
wallRunGravityScalenumberGravity during wall run.
footstepTraceDistancenumberGround trace distance.
fallingLateralFrictionnumberAir friction.
useControllerRotationYawbooleanUse controller yaw rotation.
useControllerRotationRollbooleanUse controller roll rotation.
useControllerRotationPitchbooleanUse controller pitch rotation.
cameraUsePawnControlRotationbooleanCamera follows controller rotation.
manage_combatCreate weapons with hitscan/projectile firing, configure damage types, hitboxes, reload, and melee combat (combos, parry, block). Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: blueprintPath, name, path, weaponM...96 params
Create weapons with hitscan/projectile firing, configure damage types, hitboxes, reload, and melee combat (combos, parry, block). Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: blueprintPath, name, path, weaponM...
Parameters* required
namestringName identifier.
pathstringDirectory path for asset creation.
rangenumberaction*stringCombat action to performone of
create_weapon_blueprint · configure_weapon_mesh · configure_weapon_sockets · set_weapon_stats · configure_hitscan · configure_projectileadsFovnumberFOV when aiming.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
spreadnumbermaxAmmonumberadsSpeednumberTime to aim down sights.
ammoTypestringAmmo type identifier.
durationnumberfireRatenumbermaxHealthnumbermaxShieldnumberrecoilYawnumberHorizontal recoil (degrees).
adsEnabledbooleanEnable aim down sights.
armorValuenumberbaseDamagenumberdamageTypestringeffectTypestringhealAmountnumberhitboxSizeobjectHitbox dimensions.
hitboxTypestringHitbox collision shape.one of
Capsule · Box · SpherereloadTimenumberammoPerShotnumberrecoilPitchnumberVertical recoil (degrees).
tracerSpeednumberTracer travel speed.
damageAmountnumberinfiniteAmmobooleanmagazineSizenumbershieldAmountnumberstartingAmmonumberswitchInTimenumberTime to equip weapon.
traceChannelstringTrace channel for hitscan.one of
Visibility · Camera · Weapon · CustomblueprintPathstringBlueprint asset path.
bounceEnabledbooleanEnable projectile bouncing.
damageImpulsenumberImpulse applied on hit.
homingEnabledbooleanEnable homing behavior.
maxComboCountnumberMaximum combo length.
shellLifespannumberShell casing lifetime.
shellMeshPathstringPath to shell casing mesh.
spreadPatternstringSpread pattern type.one of
Random · Fixed · FixedWithRandom · ShotgunswitchOutTimenumberTime to unequip weapon.
hitboxBoneNamestringBone name for hitbox.
hitscanEnabledbooleanEnable hitscan firing.
parryWindowEndnumberParry window end time (normalized).
recoilRecoverynumberRecoil recovery speed.
spreadIncreasenumberSpread increase per shot.
spreadRecoverynumberSpread recovery rate.
weaponMeshPathstringPath to weapon static/skeletal mesh.
attachmentSlotsarrayAttachment slot definitions.
collisionRadiusnumbercomboWindowTimenumberTime window for combo input.
damagePerSecondnumberdamageReductionnumberimpactDecalPathstringPath to impact decal.
impactSoundPathstringPath to impact sound.
muzzleSoundPathstringPath to firing sound.
projectileClassstringProjectile class path.
projectileSpeednumbershieldRegenRatenumberblockStaminaCostnumberStamina cost per blocked hit.
damageMultipliernumberDamage multiplier for this hitbox.
hitPauseDurationnumberHitstop duration in seconds.
isDamageZoneHeadbooleanMark as headshot zone.
meleeTraceRadiusnumberSphere trace radius.
muzzleFlashScalenumberMuzzle flash scale.
muzzleSocketNamestringMuzzle socket name.
parryWindowStartnumberParry window start time (normalized).
shieldRegenDelaynumbercriticalMultipliernumberCritical hit damage multiplier.
ejectionSocketNamestringShell ejection socket name.
equipAnimationPathstringPath to equip animation montage.
headshotMultipliernumberHeadshot damage multiplier.
hitReactionMontagestringPath to hit reaction montage.
homingAccelerationnumberHoming turn rate.
impactParticlePathstringPath to impact particle.
parryAnimationPathstringPath to parry animation.
projectileLifespannumberprojectileMeshPathstringPath to projectile mesh.
shellEjectionForcenumberShell ejection impulse.
tracerParticlePathstringPath to tracer particle.
adsSpreadMultipliernumberSpread multiplier when aiming.
bounceVelocityRationumberVelocity retained on bounce (0-1).
hitReactionStunTimenumberStun duration on hit.
meleeTraceEndSocketstringSocket for trace end.
reloadAnimationPathstringPath to reload animation.
blockDamageReductionnumberDamage reduction when blocking (0-1).
hitPauseTimeDilationnumberTime dilation during hitstop.
unequipAnimationPathstringPath to unequip animation montage.
weaponTrailEndSocketstringTrail end socket.
meleeTraceStartSocketstringSocket for trace start.
projectileGravityScalenumberweaponTrailStartSocketstringTrail start socket.
muzzleFlashParticlePathstringPath to muzzle flash particle.
weaponTrailParticlePathstringPath to weapon trail particle.
manage_aiBuild AI systems: AI controllers, Behavior Trees, Blackboards, EQS, perception, State Trees, Smart Objects, NavMesh settings, nav modifiers, links, and pathfinding. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action:...94 params
Build AI systems: AI controllers, Behavior Trees, Blackboards, EQS, perception, State Trees, Smart Objects, NavMesh settings, nav modifiers, links, and pathfinding. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action:...
Parameters* required
xnumberynumbernamestringName identifier.
pathstringDirectory path for asset creation.
savebooleanSave the asset(s) after the operation.
valuevalueGeneric value (any type).
action*stringAI action to performone of
create_ai_controller · assign_behavior_tree · assign_blackboard · create_blackboard_asset · add_blackboard_key · set_key_instance_syncednodeIdstringID of the node.
offsetobject3D vector.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
teamIdnumberTeam ID for perception affiliation (0=Neutral, 1=Player, 2=Enemy, etc.).
commentstringenabledbooleankeyNamestringName of the key.
keyTypestringBlackboard key data type.one of
Bool · Int · Float · Vector · Rotator · ObjecttoStatestringTarget state name.
areaCostnumberPathfinding cost multiplier for area (1.0 = normal).
cellSizenumberNavMesh cell size (default: 19).
endPointobjectEnd point of navigation link (relative to actor).
linkTypestringType of navigation link.one of
simple · smartlocationobjectWorld location for nav link proxy.
nodeTypestringrotationobjectRotation for nav link proxy.
savePathstringPath to save the asset.
taskTypestringTask node type.one of
MoveTo · MoveDirectlyToward · RotateToFaceBBEntry · Wait · WaitBlackboardTime · PlayAnimationtestTypestringEQS test type.one of
Distance · Dot · GameplayTags · Overlap · Pathfinding · PathfindingBatchactorNamestringName of the actor.
areaClassstringNavigation area class path.
assetPathstringAsset path (e.g., /Game/Path/Asset).
directionstringLink traversal direction.one of
BothWays · LeftToRight · RightToLeftfromStatestringSource state name.
nodeClassstringNode class path.
queryPathstringPath to EQS query asset.
slotIndexnumberIndex of slot to configure.
stateNamestringName of the state.
stateTypestringtestIndexnumberIndex of test to configure.
cellHeightnumberNavMesh cell height (default: 10).
configPathstringPath to config asset.
propertiesobjectsnapRadiusnumberSnap radius for link endpoints (default: 30).
spawnCountnumberstartPointobjectStart point of navigation link (relative to actor).
tileSizeUUnumberNavMesh tile size in UU (default: 1000).
agentHeightnumberNavigation agent height (default: 144).
agentRadiusnumberNavigation agent radius (default: 35).
childNodeIdstringID of the node.
contextTypestringEQS context type.one of
Querier · Item · EnvQueryContext_BlueprintBase · CustomenableSightbooleanlinkEnabledbooleanWhether the link is enabled.
serviceTypestringService node type.one of
DefaultFocus · RunEQS · CustomsightConfigobjectAI sight sense configuration.
sightRadiusnumbersubnodeTypestringBehavior Tree subnode kind for add_subnode.one of
Decorator · ServicetriggerTypestringdamageConfigobjectAI damage sense configuration.
enableDamagebooleanhearingRangenumberparentNodeIdstringID of the node.
testSettingsobjectTest scoring and filter settings.
agentMaxSlopenumberMaximum slope angle in degrees (default: 44).
blueprintPathstringBlueprint asset path.
componentNamestringName of the component.
compositeTypestringComposite node type.one of
Selector · Sequence · Parallel · SimpleParalleldecoratorTypestringDecorator node type.one of
Blackboard · BlackboardBased · CompareBBEntries · Cooldown · ConeCheck · DoesPathExistdominantSensestringDominant sense for perception prioritization.one of
Sight · Hearing · Damage · Touch · NoneenableHearingbooleangeneratorTypestringEQS generator type.one of
ActorsOfClass · CurrentLocation · Donut · OnCircle · PathingGrid · SimpleGridhearingConfigobjectAI hearing sense configuration.
minRegionAreanumberMinimum region area to keep.
stateTreePathstringPath to State Tree asset.
blackboardPathstringPath to blackboard asset.
controllerPathstringPath to controller blueprint.
definitionPathstringPath to definition asset.
failsafeExtentobjectFailsafe extent for nav modifier when actor has no collision.
focusActorNamestringName of the actor.
obstacleExtentobjectExtent of simple box obstacle.
obstacleOffsetobjectOffset of simple box obstacle.
agentStepHeightnumberMaximum step height agent can climb (default: 35).
baseObjectClassstringbroadcastRadiusnumberRadius for state change broadcast.
loseSightRadiusnumbermergeRegionSizenumberRegion merge threshold.
parentStateNamestringbehaviorTreePathstringPath to behavior tree asset.
enabledAreaClassstringArea class when smart link is enabled.
isInstanceSyncedbooleanSync key across instances.
broadcastIntervalnumberInterval for state change broadcast (0 = single).
disabledAreaClassstringArea class when smart link is disabled.
generatorSettingsobjectGenerator-specific settings.
obstacleAreaClassstringArea class for box obstacle.
bCreateBoxObstaclebooleanAdd box obstacle during nav generation.
peripheralVisionAnglenumbermaxSimplificationErrornumberEdge simplification error.
manage_inventoryCreate item data assets, inventory components, world pickups, loot tables, and crafting recipes. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, save, blueprintPath, itemPath, iconPath, maxStackSize,...57 params
Create item data assets, inventory components, world pickups, loot tables, and crafting recipes. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, path, save, blueprintPath, itemPath, iconPath, maxStackSize,...
Parameters* required
namestringName of the asset to create.
pathstringDirectory path for asset creation.
savebooleanSave the asset(s) after the operation.
slotsarrayEquipment slot names to configure.
tiersarrayQuality tier definitions.
action*stringInventory action to perform.one of
create_item_data_asset · set_item_properties · create_item_category · assign_item_category · create_inventory_component · configure_inventory_slotsparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
promptstringPrompt text.
bobbingbooleanEnable bobbing animation.
iconPathstringPath to icon texture.
itemPathstringPath to item data asset.
quantitynumberrotationbooleanEnable rotation animation.
actorPathstringPath to actor Blueprint for loot drop.
craftTimenumberTime in seconds to craft.
dropCountnumberNumber of drops to roll.
maxWeightnumberslotCountnumberstackablebooleandropRadiusnumberRadius for scattered drops.
entryIndexnumberglowEffectbooleanEnable glow effect.
lootWeightnumberWeight for drop chance calculation.
pickupPathstringPath to pickup actor Blueprint.
propertiesobjectrecipePathstringPath to crafting recipe asset.
replicatedbooleanWhether to replicate.
dropOnDeathbooleanmaxQuantitynumberMaximum drop quantity.
minQuantitynumberMinimum drop quantity.
recipePathsarrayrespawnTimenumberRespawn time in seconds.
respawnablebooleanstationPathstringstationTypestringType of crafting station.
uniqueItemsbooleancategoryPathstringPath to item category asset.
enableWeightbooleanmaxStackSizenumberabilityGrantsbooleanEnable ability grant support when equipped.
blueprintPathstringBlueprint asset path.
componentNamestringName of the component.
defaultSocketstringName of the socket.
lootTablePathstringPath to loot table asset.
requiredLevelnumberRequired player level.
statModifiersbooleanEnable stat modifier support when equipped.
attachToSocketbooleanAttach mesh to socket when equipped.
outputItemPathstringPath to item produced by recipe.
outputQuantitynumberQuantity produced.
passiveEffectsbooleanEnable passive effect support when equipped.
interactionTypestringHow player picks up item.one of
Overlap · Interact · Key · HoldrequiredStationstringRequired crafting station type.
encumberanceSystembooleaningredientItemPathstringPath to item data asset.
replicationConditionstringReplication condition for inventory.one of
None · OwnerOnly · SkipOwner · SimulatedOnly · AutonomousOnly · CustomencumberanceThresholdnumbercraftingSpeedMultipliernumbermanage_interactionCreate interactive objects: doors, switches, chests, levers. Set up destructible meshes and trigger volumes. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, folder, blueprintPath, actorName, componentName,...29 params
Create interactive objects: doors, switches, chests, levers. Set up destructible meshes and trigger volumes. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by action: name, folder, blueprintPath, actorName, componentName,...
Parameters* required
namestringName identifier.
action*stringThe interaction action to perform.one of
create_interaction_component · configure_interaction_trace · configure_interaction_widget · add_interaction_events · create_interactable_interface · create_door_actorfolderstringPath to a directory.
lockedbooleanWhether the item is locked.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
doorPathstringPath to door actor blueprint.
openTimenumberTime to open/close door in seconds.
actorNamestringName of the actor.
autoClosebooleanAutomatically close after opening.
canTogglebooleanchestPathstringPath to chest actor blueprint.
openAnglenumberDoor open rotation angle in degrees.
resetTimenumberTime to reset switch in seconds.
traceTypestringType of interaction trace.one of
line · sphere · boxswitchPathstringPath to switch actor blueprint.
switchTypestringType of switch.one of
button · lever · pressure_plate · togglerequiresKeybooleanWhether interaction requires a key item.
showOnHoverbooleanShow widget when hovering.
traceRadiusnumberTrace radius.
triggerPathstringPath to trigger actor blueprint.
widgetClassstringWidget class path.
triggerShapestringShape of trigger volume.one of
box · sphere · capsuleblueprintPathstringBlueprint asset path.
componentNamestringName of the component.
lootTablePathstringPath to loot table asset.
traceDistancenumberTrace distance.
autoCloseDelaynumberDelay before auto-close in seconds.
showPromptTextbooleanShow interaction prompt text.
promptTextFormatstringFormat string for prompt (e.g., "Press {Key} to {Action}").
manage_networkingConfigure multiplayer and player flow: replication, RPCs, authority/relevancy, network prediction, sessions, split-screen, LAN/voice chat, game framework classes, match rules, and input mappings. Required: action. Select one enum value, then provide only parameters relevant to...127 params
Configure multiplayer and player flow: replication, RPCs, authority/relevancy, network prediction, sessions, split-screen, LAN/voice chat, game framework classes, match rules, and input mappings. Required: action. Select one enum value, then provide only parameters relevant to...
Parameters* required
altbooleanRequire Alt for a legacy action mapping.
cmdbooleanRequire Cmd for a legacy action mapping.
keystringctrlbooleanRequire Ctrl for a legacy action mapping.
namestringName identifier.
pathstringDirectory path for asset creation.
rolestringNet role.one of
ROLE_None · ROLE_SimulatedProxy · ROLE_AutonomousProxy · ROLE_AuthoritysavebooleanSave the asset(s) after the operation.
mutedbooleanWhether the item is muted.
scalenumberLegacy input axis scale.
shiftbooleanRequire Shift for a legacy action mapping.
action*stringNetworking action to performone of
set_property_replicated · set_replication_condition · configure_net_update_frequency · configure_net_priority · set_net_dormancy · configure_replication_graphparamsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
statesarrayMatch state definitions.
enabledbooleanWhether the item/feature is enabled.
mapNamestringMap to load for hosting. REQUIRED for host_lan_server.
rpcTypestringType of RPC.one of
Server · Client · NetMulticastaxisNamestringLegacy input axis mapping name.
dataTypestringNetwork prediction data type.one of
Transform · Vector · Rotator · FloatdormancystringNet dormancy mode.one of
DORM_Never · DORM_Awake · DORM_DormantAll · DORM_DormantPartial · DORM_InitialhudClassstringHUD class path.
numTeamsnumberprioritynumberPriority for input mapping context (default: 0).
reliablebooleanWhether the operation is reliable.
teamSizenumberwinScorenumberactorNamestringName of the actor.
assetPathstringAsset path (e.g., /Game/Path/Asset).
conditionstringReplication condition.one of
COND_None · COND_InitialOnly · COND_OwnerOnly · COND_SkipOwner · COND_SimulatedOnly · COND_AutonomousOnlynumRoundsnumberpawnClassstringPawn class to use.
roundTimenumberteamIndexnumberTeam index for PlayerStart.
timeoutMsnumberactionNamestringLegacy input action mapping name.
actionPathstringAsset path (e.g., /Game/Path/Asset).
canRespawnbooleanmaxPlayersnumberplayerNamestringPlayer name for voice operations. REQUIRED for mute_player (or targetPlayerId).
replicatedbooleanWhether property should be replicated.
serverNamestringDisplay name for the server.
serverPortnumberstructNamestringName of struct for custom serialization.
systemWidebooleanautoBalancebooleanEnable automatic team balancing.
bIsLANMatchbooleanWhether this is a LAN match.
channelNamestringVoice channel name. REQUIRED for set_voice_channel.
channelTypestringVoice channel type.one of
Team · Global · Proximity · PartycontextPathstringAsset path (e.g., /Game/Path/Asset).
maxRespawnsnumbernetPrioritynumberNetwork priority for bandwidth (default 1.0).
parentClassstringPath or name of the parent class.
playerIndexnumberLocal player index. REQUIRED for remove_local_player.
sessionNamestringName of the session.
triggerTypestringcontrollerIdnumberController ID for player input. REQUIRED for add_local_player.
forceRespawnbooleanfriendlyFirebooleanEnable friendly fire damage.
functionNamestringName of the function.
modifierTypestringpropertyNamestringName of the property.
respawnDelaynumberrespawnLivesnumberscorePerKillnumberPoints awarded per kill.
usePushModelbooleanUse push-model replication.
variableNamestringName of the variable.
voiceEnabledbooleanEnable/disable voice chat. REQUIRED for enable_voice_chat.
bAllowInvitesbooleanAllow player invites.
bDelayedStartbooleanWhether to delay match start.
bUsesPresencebooleanUse presence for session discovery.
blueprintPathstringBlueprint asset path.
executeTravelbooleaninterfaceTypestringType of session interface to use. REQUIRED for configure_session_interface.one of
Default · LAN · NullmaxClientRatenumberMax client rate.
pushToTalkKeystringKey binding for push-to-talk.
repNotifyFuncstringRepNotify function name.
scorePerDeathnumberserverAddressstringServer IP address. REQUIRED for join_lan_server.
smoothingRatenumberSmoothing rate for corrections.
travelOptionsstringTravel URL options string.
voiceSettingsobjectVoice processing settings. REQUIRED for configure_voice_settings.
alwaysRelevantbooleanAlways relevant to all clients.
gameStateClassstringGameState class path.
localPlayerNumnumberownerActorNamestringName of owner actor (null to clear).
scorePerAssistnumberPoints awarded per assist.
serverPasswordstringServer password for protected games.
spectatorClassstringSpectator pawn class.
targetPlayerIdstringTarget player ID. REQUIRED for mute_player (or playerName).
withValidationbooleanEnable RPC validation.
allowSpectatingbooleanAllow spectator mode.
netLoadOnClientbooleanNet load on client for replication graph.
respawnLocationstringWhere players respawn.one of
PlayerStart · LastDeath · TeamBasespatiallyLoadedbooleanSpatially loaded for replication graph.
splitScreenTypestringSplit-screen layout type. REQUIRED for set_split_screen_type.one of
None · TwoPlayer_Horizontal · TwoPlayer_Vertical · ThreePlayer_FavorTop · ThreePlayer_FavorBottom · FourPlayer_GridusePlayerStartsbooleanUse PlayerStart actors.
bShouldAdvertisebooleanAdvertise session publicly.
defaultPawnClassstringDefault pawn class for GameMode.
enablePredictionbooleanEnable client-side prediction.
intermissionTimenumberplayerStateClassstringPlayerState class path.
attenuationRadiusnumberRadius for voice attenuation (Proximity chat). REQUIRED for set_voice_attenuation.
gameModeBlueprintstringPath to GameMode blueprint to configure.
isAutonomousProxybooleanConfigure as autonomous proxy.
pushToTalkEnabledbooleanEnable push-to-talk mode. REQUIRED for configure_push_to_talk.
replicateMovementbooleanReplicate movement.
replicationPolicystringReplication policy for replication graph.
scorePerObjectivenumberPoints awarded per objective.
spectatorViewModestringSpectator view mode.one of
FreeCam · ThirdPerson · FirstPerson · DeathCamattenuationFalloffnumberFalloff rate for voice attenuation.
netUpdateFrequencynumberHow often actor replicates (Hz, default 100).
correctionThresholdnumberServer correction threshold.
customSerializationbooleanUse custom serialization.
onlyRelevantToOwnerbooleanOnly relevant to owner.
predictionThresholdnumberPrediction threshold for client prediction.
bAllowJoinInProgressbooleanAllow joining games in progress.
netServerMaxTickRatenumberServer max tick rate.
networkSmoothingModestringMovement smoothing mode.one of
Disabled · Linear · ExponentialspawnSelectionMethodstringHow to select spawn points.one of
Random · RoundRobin · FarthestFromEnemiesuseOwnerNetRelevancybooleanUse owner relevancy.
maxInternetClientRatenumberMax internet client rate.
minNetUpdateFrequencynumberMinimum update frequency when idle (Hz, default 2).
playerControllerClassstringPlayerController class path.
bUseLobbiesIfAvailablebooleanUse lobby system if available.
netCullDistanceSquarednumberNetwork cull distance squared.
networkNoSmoothUpdateDistancenumberNo smooth update distance.
networkMaxSmoothUpdateDistancenumberMax smooth update distance.
manage_level_structureStructure worlds: levels, sublevels, World Partition, streaming, data layers, HLOD, level instances, trigger/blocking/physics/audio/post-process volumes, and nav bounds. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by ac...79 params
Structure worlds: levels, sublevels, World Partition, streaming, data layers, HLOD, level instances, trigger/blocking/physics/audio/post-process volumes, and nav bounds. Required: action. Select one enum value, then provide only parameters relevant to that action. Params by ac...
Parameters* required
savebooleanSave the asset(s) after the operation.
action*stringLevel structure action to perform.one of
create_level · create_sublevel · configure_level_streaming · set_streaming_distance · configure_level_bounds · enable_world_partitionboundsobjectextentobjectExtent (half-size) of the volume in each axis.
filterstringGeneral search filter.
paramsobjectOptional action-specific parameters. These are merged with top-level arguments before routing for clients that cannot send arbitrary top-level fields.
bEnabledbooleanWhether the audio volume is enabled.
bUnboundbooleanWhether post process volume affects entire world.
cellSizenumberHLOD cell size.
fadeTimenumberFade time in seconds.
gridNamestringlocationobjectWorld location for the volume.
nodeNamestringName of the node.
prioritynumberPriority value.
rotationobjectRotation of the volume.
actorNamestringName of the actor.
actorPathstringPath to actor.
boxExtentobjectExtent for box trigger volumes.
layerTypestringlevelNamestringlevelPathstringLevel asset path.
nodeClassstringNode class path.
volumeNamestringName of the volume.
volumeTypestringType filter for get_volumes_info (e.g., "Trigger", "Physics").
blendRadiusnumberBlend radius for post process volume.
blendWeightnumberBlend weight (0.0-1.0) for post process.
parentLevelstringParent level path.
bPainCausingbooleanWhether the volume causes pain/damage.
bWaterVolumebooleanWhether this is a water volume.
boundsExtentobjectExtent of level bounds.
boundsOriginobjectOrigin of level bounds.
createVolumebooleanCreate a streaming volume (true) or just report existing volumes (false). Default: true.
damagePerSecnumberDamage per second for pain volumes.
gridCellSizenumberWorld Partition grid cell size.
loadingRangenumberLoading range for grid cells.
nodePositionobjectPosition of node in graph.
reverbVolumenumberVolume level for reverb (0.0-1.0).
sphereRadiusnumberRadius for sphere trigger volumes.
sublevelNamestringName of the sublevel.
sublevelPathstringLevel asset path.
volumeExtentobjectExtent of the volume.
capsuleRadiusnumberRadius for capsule trigger volumes.
cullDistancesarrayArray of size/distance pairs for cull distance volumes.
dataLayerNamestringName of the data layer.
dataLayerTypestringType of data layer.one of
Runtime · EditorfluidFrictionnumberFluid friction for physics volumes.
hlodLayerNamestringName of the HLOD layer.
hlodLayerPathstringPath to HLOD layer.
instanceScaleobjectScale of the level instance.
sourcePinNamestringName of the source pin.
targetPinNamestringName of the target pin.
levelAssetPathstringPath to the level asset for instancing.
sourceNodeNamestringSource node name.
streamingUsagestringStreaming volume usage mode (default: LoadingAndVisibility).one of
Loading · LoadingAndVisibility · VisibilityBlockingOnLoad · BlockingOnLoad · LoadingNotVisibletargetNodeNamestringTarget node name.
volumeLocationobjectLocation of the volume.
bPackBlueprintsbooleanInclude blueprints in packed level.
createIfMissingbooleanloadingDistancenumberHLOD loading distance.
packedLevelNamestringName for the packed level actor.
streamingMethodstringLevel streaming method.one of
Blueprint · AlwaysLoaded · DisabledbShouldBeVisiblebooleanLevel should be visible when loaded.
instanceLocationobjectLocation of the level instance.
instanceRotationobjectRotation of the level instance.
terminalVelocitynumberTerminal velocity in the volume.
bPackStaticMeshesbooleanInclude static meshes in packed level.
capsuleHalfHeightnumberHalf-height for capsule trigger volumes.
levelInstanceNamestringLevel instance name.
streamingDistancenumberDistance/radius for streaming volume (creates ALevelStreamingVolume).
bIsInitiallyLoadedbooleanData layer initially loaded.
bIsSpatiallyLoadedbooleanHLOD is spatially loaded.
bShouldBlockOnLoadbooleanBlock game until level is loaded.
bUseExternalActorsbooleanEnable One File Per Actor (OFPA/External Actors) for Data Layer compatibility. Automatically enabled when bCreateWorldPartition is true.
bIsInitiallyVisiblebooleanData layer initially visible.
bAutoCalculateBoundsbooleanAuto-calculate bounds from content.
bBlockOnSlowStreamingbooleanbCreateWorldPartitionbooleanCreate with World Partition enabled.
bEnableWorldPartitionbooleanEnable World Partition for level.
bDisableDistanceStreamingbooleanDisable distance-based streaming.
Unreal Engine MCP Server
A comprehensive Model Context Protocol (MCP) server that enables AI assistants to control Unreal Engine through a native C++ Automation Bridge plugin. Built with TypeScript and C++.
Table of Contents
- Features
- Getting Started
- Configuration
- Available Tools
- Docker
- Documentation
- Community
- Development
- Contributing
Features
| Category | Capabilities |
|---|---|
| Asset Management | Browse, import, duplicate, rename, delete assets; create materials |
| Actor Control | Spawn, delete, transform, physics, tags, components |
| Editor Control | PIE sessions, camera, viewport, screenshots, bookmarks |
| Level Management | Load/save levels, streaming, lighting |
| Animation & Physics | Animation BPs, state machines, ragdolls, vehicles, constraints |
| Visual Effects | Niagara particles, GPU simulations, procedural effects, debug shapes |
| Sequencer | Cinematics, timeline control, camera animations, keyframes |
| Graph Editing | Blueprint, Niagara, Material, and Behavior Tree graph manipulation |
| Audio | Sound cues, audio components, sound mixes, ambient sounds |
| System | Console commands, UBT, tests, logs, project settings, CVars |
Architecture
- Native C++ Automation — All operations route through the MCP Automation Bridge plugin
- Dual Transport — Native HTTP/SSE (no bridge needed) or WebSocket via TypeScript bridge
- Dynamic Type Discovery — Runtime introspection for lights, debug shapes, and sequencer tracks
- Graceful Degradation — Server starts even without an active Unreal connection
- On-Demand Connection — Retries automation handshakes with exponential backoff
- Command Safety — Blocks dangerous console commands with pattern-based validation
- Capability Token Auth — Optional token-based authentication for both WS and HTTP transports
- Asset Caching — 10-second TTL for improved performance
- Metrics Rate Limiting — Per-IP rate limiting (60 req/min) on Prometheus endpoint
- Centralized Configuration — Unified class aliases and type definitions
Getting Started
Prerequisites
- Unreal Engine 5.0–5.8 (5.8 preview validated)
Choose your transport:
- Option A: Native MCP (recommended) — no additional dependencies
- Option B: TypeScript Bridge — requires Node.js 18+
Step 1: Install MCP Server (Option B only — skip for Native MCP)
Skip this step if using Option A: Native MCP Transport (Step 4A below).
NPX (Recommended):
npx unreal-engine-mcp-server
Clone & Build:
git clone https://github.com/ChiR24/Unreal_mcp.git
cd Unreal_mcp
npm install
npm run build
node dist/cli.js
Step 2: Install Unreal Plugin
The MCP Automation Bridge plugin is included at Unreal_mcp/plugins/McpAutomationBridge.
From source (requires a project with code target)
Your project must have a code target (.sln or .xcworkspace).
Blueprint-only projects cannot compile native plugins — to convert, add any class via Tools > New C++ Class in the editor.
Method 1: Copy Folder
Copy: Unreal_mcp/plugins/McpAutomationBridge/
To: YourUnrealProject/Plugins/McpAutomationBridge/
Method 2: External Plugin Directory (no copy needed)
- Open Unreal Editor → Edit → Plugins
- Click Plugin Directories (bottom-left)
- In Additional Plugin Directories, add the path to
Unreal_mcp/plugins/ - Restart the editor — the plugin will be picked up from the external location
This saves the path in your .uproject file so the plugin stays linked without copying.
The plugin compiles automatically when you open the project — UE detects the .uplugin + Source/ and runs UnrealBuildTool.
Video Guide:
https://github.com/user-attachments/assets/d8b86ebc-4364-48c9-9781-de854bf3ef7d
⚠️ First-Time Project Open: UE may prompt "Would you like to rebuild them now?" — click Yes. If instead you see "Missing Modules — McpAutomationBridge. Engine modules cannot be compiled at runtime. Please build through your IDE." — open your project in Visual Studio (Win) or Xcode (Mac) and build from there. After that, the editor will open normally with the plugin loaded.
Pre-built (works with any project, including Blueprint-only)
Build the plugin once, then distribute the compiled binaries — no IDE or compilation needed on the target machine.
1. Build:
# macOS / Linux
./scripts/package-plugin.sh /path/to/UE_5.6
# Windows
scripts\package-plugin.bat C:\Path\To\UE_5.6
This produces a zip like McpAutomationBridge-v0.5.30-UE5.6-Mac.zip.
2. Install: unzip into YourProject/Plugins/ and open the project. That's it — no compilation step.
Note: pre-built binaries are tied to a specific UE version. A build for 5.6 won't work with 5.5, 5.7, or 5.8.
Step 3: Enable Required Plugins
Enable via Edit → Plugins, then restart the editor.
Core Plugins (Required)
| Plugin | Required For |
|---|---|
| MCP Automation Bridge | All automation operations |
| Python Editor Script Plugin | Python-backed editor automation helpers |
| Editor Scripting Utilities | Asset/Actor subsystem operations |
| Niagara | Visual effects and particle systems |
| Gameplay Abilities | manage_gas operations |
| Smart Objects | AI smart object operations |
Optional Plugins (Auto-enabled)
| Plugin | Required For |
|---|---|
| Level Sequence Editor | manage_sequence operations |
| Control Rig | animation_physics operations |
| GeometryScripting | manage_geometry operations |
| Behavior Tree Editor | manage_ai Behavior Tree operations |
| Niagara Editor | Niagara authoring |
| Environment Query Editor | AI/EQS operations |
| MetaSound | manage_audio MetaSound authoring |
| StateTree | manage_ai State Tree operations |
| Enhanced Input | manage_networking input mapping operations |
| Chaos Cloth | Cloth simulation |
| Interchange | Asset import/export |
| Data Validation | Data validation |
| PCG | manage_pcg graph authoring and execution when enabled for the build |
| Procedural Mesh Component | Procedural geometry |
| OnlineSubsystem | Session/networking operations |
| OnlineSubsystemUtils | Session/networking operations |
💡 Optional plugins are auto-enabled by the MCP Automation Bridge plugin when needed. PCG support is compiled for source projects when the project explicitly enables PCG. Versioned release packages for UE 5.2+ include PCG support.
Step 4: Configure MCP Client
Option A: Native MCP Transport (Direct HTTP — no bridge needed)
The plugin includes a built-in MCP Streamable HTTP server. AI clients connect directly to the plugin over HTTP — no TypeScript bridge, no Node.js, no npm.
Enable in Unreal:
- Edit > Project Settings > Plugins > MCP Automation Bridge
- Check Enable Native MCP
- Set port (default:
3000) - Optionally set Native MCP Instructions for project-specific guidance
- Restart the editor
Configure your MCP client to use Streamable HTTP transport at:
http://localhost:3000/mcp
Claude Code:
claude mcp add unreal-engine --transport http http://localhost:3000/mcp
Or manually in ~/.claude/settings.json or project .mcp.json:
{
"mcpServers": {
"unreal-engine": {
"type": "url",
"url": "http://localhost:3000/mcp"
}
}
}
Cursor (.cursor/mcp.json):
{
"mcpServers": {
"unreal-engine": {
"url": "http://localhost:3000/mcp"
}
}
}
Verify it works:
- Status bar — look for
● MCP :3000 (2)in the bottom-right of the editor. Green dot = server running, number in parens = active sessions. Click it to open settings. - Output Log — filter by
LogMcpNativeTransportto see connections, tool calls, and session activity:LogMcpNativeTransport: Native MCP server started on http://localhost:3000/mcp LogMcpNativeTransport: MCP session initialized: ... (client: claude-code 2.1.92, active sessions: 1) LogMcpNativeTransport: tools/call: inspect (RequestId=...) LogMcpNativeTransport: tools/call completed: ... (tool=inspect, success=true)
Features:
- SSE streaming for real-time progress during long operations
- Multiple concurrent sessions (Cursor + Claude Code + others simultaneously)
- Dynamic tool management — core tools load by default, enable more via
manage_tools - Python execution via
execute_pythonaction (inline code or .py files) - Capability token authentication — enable in project settings for network security
Option B: TypeScript Bridge (stdio — classic setup)
Add to your Claude Desktop / Cursor config file:
Using Clone/Build:
{
"mcpServers": {
"unreal-engine": {
"command": "node",
"args": ["path/to/Unreal_mcp/dist/cli.js"],
"env": {
"UE_PROJECT_PATH": "C:/Path/To/YourProject",
"MCP_AUTOMATION_PORT": "8091"
}
}
}
}
Using NPX:
{
"mcpServers": {
"unreal-engine": {
"command": "npx",
"args": ["unreal-engine-mcp-server"],
"env": {
"UE_PROJECT_PATH": "C:/Path/To/YourProject"
}
}
}
}
Configuration
Environment Variables
# Required
UE_PROJECT_PATH="C:/Path/To/YourProject"
# Automation Bridge
MCP_AUTOMATION_HOST=127.0.0.1
MCP_AUTOMATION_PORT=8091
# LAN Access (optional)
# SECURITY: Set to true to allow binding to non-loopback addresses (e.g., 0.0.0.0)
# Only enable if you understand the security implications.
MCP_AUTOMATION_ALLOW_NON_LOOPBACK=false
# Logging
LOG_LEVEL=info # debug | info | warn | error
# Optional
MCP_CONNECTION_TIMEOUT_MS=5000
MCP_REQUEST_TIMEOUT_MS=120000
ASSET_LIST_TTL_MS=10000
# Optional Prometheus metrics endpoint
# Loopback-only by default. Non-loopback metrics requires both explicit opt-in and a token.
# MCP_METRICS_PORT=9100
# MCP_METRICS_HOST=127.0.0.1
# MCP_METRICS_ALLOW_NON_LOOPBACK=false
# MCP_METRICS_TOKEN=change-me
# Custom content mount points (comma-separated)
# Plugins with CanContainContent register mount points beyond /Game/.
# MCP_ADDITIONAL_PATH_PREFIXES=/ProjectObject/,/ProjectAnimation/
LAN Access Configuration
By default, the automation bridge only binds to loopback addresses (127.0.0.1) for security. To enable access from other machines on your network:
TypeScript (MCP Server):
MCP_AUTOMATION_ALLOW_NON_LOOPBACK=true
MCP_AUTOMATION_HOST=0.0.0.0
Unreal Engine Plugin:
- Go to Edit → Project Settings → Plugins → MCP Automation Bridge
- Under Security, enable "Allow Non Loopback"
- Under Connection, set "Listen Host" to
0.0.0.0 - Restart the editor
⚠️ Security Warning: Enabling LAN access exposes the automation bridge to your local network. Only use on trusted networks with appropriate firewall rules. Enable capability token authentication (Require Capability Token in project settings) to prevent unauthorized access when using LAN mode.
Available Tools
23 exposed MCP tools in broad all-tools mode. Related actions live directly on their parent tools so clients load less context without losing capabilities.
Core Tools
| Tool | Description |
|---|---|
manage_asset | Assets, Materials, Render Targets, Behavior Trees |
manage_blueprint | Blueprints, SCS components, graph editing, UMG widgets, layout, bindings, animations |
control_actor | Spawn, delete, transform, physics, tags |
control_editor | PIE, Camera, viewport, screenshots |
manage_level | Load/save, streaming, lighting |
system_control | UBT, Tests, Logs, Project Settings, CVars, Python Execution |
inspect | Object Introspection |
manage_tools | Dynamic tool management (enable/disable at runtime) |
World Building
| Tool | Description |
|---|---|
build_environment | Landscapes, foliage, procedural terrain, lighting, spline roads/rivers/fences |
manage_level_structure | Levels, sublevels, World Partition, streaming, data layers, HLOD, volumes |
manage_geometry | Procedural mesh creation and editing with Geometry Script |
manage_pcg | PCG graph assets, subgraphs, input/sampler/filter/spawner nodes, pin connections, execution, partition grid size, and node settings |
Gameplay Systems
| Tool | Description |
|---|---|
animation_physics | Animation BPs, skeletons, sockets, physics assets, cloth, vehicles, ragdolls, Control Rig, IK |
manage_effect | Niagara, particles, debug shapes, GPU simulations |
manage_gas | Gameplay Ability System: abilities, effects, attributes |
manage_character | Character creation, movement, advanced locomotion |
manage_combat | Weapons, projectiles, damage, melee combat |
manage_ai | AI controllers, Behavior Trees, EQS, perception, State Trees, Smart Objects, NavMesh/pathfinding |
manage_inventory | Items, equipment, loot tables, crafting |
manage_interaction | Interactables, destructibles, triggers |
Utility
| Tool | Description |
|---|---|
manage_audio | Audio Assets, Components, Sound Cues, MetaSounds, Attenuation |
manage_sequence | Sequencer, cinematics, bindings, tracks, playback, keyframes |
manage_networking | Replication, RPCs, network prediction, sessions, split-screen, LAN/voice, game framework, input mappings |
Blueprints • Materials • Textures • Static Meshes • Skeletal Meshes • Levels • Sounds • Particles • Niagara Systems • Behavior Trees
Docker
docker build -t unreal-mcp .
docker run -it --rm -e UE_PROJECT_PATH=/project unreal-mcp
Documentation
| Document | Description |
|---|---|
| Handler Mappings | TypeScript to C++ routing |
| Plugin Extension | C++ plugin architecture |
| Testing Guide | How to run and write tests |
| Roadmap | Development roadmap |
Development
npm run build # Build TypeScript
npm run lint # Run ESLint
npm run test:unit # Run unit tests
npm run test:all # Run all tests
Community
| Resource | Description |
|---|---|
| Project Roadmap | Track roadmap progress and priorities |
| Discussions | Ask questions, share ideas, get help |
| Issues | Report bugs and request features |
Contributing
Contributions welcome! Please:
- Include reproduction steps for bugs
- Keep PRs focused and small
- Follow existing code style
License
MIT — See LICENSE
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LOG_LEVELLogging level: debug, info, warn, error (default: info)
MCP_ROUTE_STDOUT_LOGSRoute standard output to standard error to avoid protocol corruption (default: true)
UE_PROJECT_PATHAbsolute path to your Unreal .uproject file
UE_EDITOR_EXEPath to UnrealEditor-Cmd.exe (optional)
UE_SCREENSHOT_DIRDirectory to save screenshots (optional)
MCP_AUTOMATION_PORTAutomation bridge WebSocket port (default: 8091)
MCP_AUTOMATION_HOSTAutomation bridge WebSocket host (default: 127.0.0.1). Set to 0.0.0.0 for LAN access (requires MCP_AUTOMATION_ALLOW_NON_LOOPBACK=true)
MCP_AUTOMATION_ALLOW_NON_LOOPBACKSECURITY: Allow binding to non-loopback addresses (e.g., 0.0.0.0) for LAN access. Only enable if you understand the security implications. (default: false)
MCP_AUTOMATION_CLIENT_MODERun as client connecting to UE (false) or server listening for UE (true) (default: false)
MCP_AUTOMATION_USE_TLSUse wss:// for the automation bridge client connection (default: false)
MCP_CONNECTION_TIMEOUT_MSConnection timeout in milliseconds (default: 5000)
MCP_REQUEST_TIMEOUT_MSRequest timeout in milliseconds (default: 30000)
MCP_AUTOMATION_MAX_MESSAGES_PER_MINUTEMax inbound automation bridge messages per minute before disconnect (default: 600)
MCP_AUTOMATION_MAX_AUTOMATION_REQUESTS_PER_MINUTEMax inbound automation request messages per minute before disconnect (default: 120)
Categories
Registryactive
Packageunreal-engine-mcp-server
TransportSTDIO
Resources6
Tools verifiedJun 10, 2026
UpdatedJun 5, 2026
