Warhammer Oracle

Warhammer 40K rules, unit stats, and game flow. An MCP server.

Ask your AI assistant about datasheets, stratagems, detachments, enhancements, keywords, phase sequences, wound math, and more. Covers Warhammer 40,000, Combat Patrol, and Kill Team.

Installation

npx warhammer-oracle

Or install globally:

npm install -g warhammer-oracle

Configuration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "warhammer-oracle": {
      "command": "npx",
      "args": ["-y", "warhammer-oracle"]
    }
  }
}

Claude Code

claude mcp add warhammer-oracle -- npx -y warhammer-oracle

Tools

lookup_unit

Look up a unit datasheet by name. Returns stat profiles, ranged and melee weapons, abilities, and keywords.

"Look up the Intercessor Squad datasheet"
"What are the stats for a Leman Russ Battle Tank?"

Parameters: unit_name (required), faction (optional), game_mode (optional: 40k, combat_patrol, kill_team)

lookup_keyword

Look up a keyword or rule. Returns the official definition, a plain English explanation, examples, and which game modes it applies to.

"What does Devastating Wounds do?"
"Explain the Feel No Pain keyword"

Parameters: keyword (required), game_mode (optional)

lookup_phase

Look up a game phase by name. Returns step-by-step instructions and tips.

"Walk me through the Shooting phase"
"How does the Firefight phase work in Kill Team?"

Parameters: phase_name (required), game_mode (optional, default: 40k)

search_units

Search units by name, faction, or keywords. Returns a compact list (max 10 results) with faction, points, and keywords.

"Find all Necron units under 100 points"
"Search for units with the Fly keyword"

Parameters: query (required), faction (optional), max_points (optional), game_mode (optional)

compare_units

Compare 2-4 units side by side. Shows full datasheets for each unit in a single response.

"Compare Intercessors vs Tactical Marines"
"Compare the Leman Russ, Predator, and Hammerhead side by side"

Parameters: units (required, array of 2-4 unit names)

game_flow

Show the full turn sequence for a game mode, or highlight where you are in the turn and what comes next.

"Show me the 40K turn sequence"
"I'm in the Shooting phase — what's next?"
"Show the Kill Team turn sequence"

Parameters: current_phase (optional), game_mode (optional, default: 40k)

lookup_stratagem

Look up a Warhammer 40,000 stratagem by name. Returns CP cost, phase timing, target, and effect.

"What does Fire Overwatch do?"
"Show me the Command Re-roll stratagem"

Parameters: name (required), faction (optional), phase (optional), detachment (optional)

search_stratagems

Search stratagems by name, faction, phase, or detachment. Returns a compact list (max 10).

"What stratagems can I use in the Fight phase?"
"Show me Gladius Task Force stratagems"

Parameters: query (required), faction (optional), phase (optional), detachment (optional)

lookup_detachment

Look up a detachment by name. Returns the detachment ability, available enhancements, and associated stratagems.

"Show me the Gladius Task Force detachment"
"What does the Warhost detachment do for Aeldari?"

Parameters: name (required), faction (optional)

lookup_enhancement

Look up a character enhancement by name. Returns points cost, detachment, and effect.

"What does Adept of the Codex do?"
"Show me Aeldari enhancements"

Parameters: name (required), faction (optional), detachment (optional)

lookup_ploy

Look up a Kill Team ploy by name. Returns type (strategic/tactical), CP cost, timing, and effect.

"What does the Bolster ploy do in Kill Team?"
"Show me Legionaries ploys"

Parameters: name (required), faction (optional), type (optional: strategic, tactical)

wound_calculator

Calculate expected damage output for an attack profile against a target. Handles re-rolls, weapon keywords (Lethal Hits, Devastating Wounds, Sustained Hits, Torrent), invulnerable saves, and Feel No Pain.

"Calculate damage: 10 attacks, BS3+, S5 AP-1 D2 vs T4 Sv3+"
"How much damage does a lascannon do to a Leman Russ?"

Parameters: attacks, hit_skill, strength, toughness, armour_save, damage (all required); armour_penetration, invulnerable_save, feel_no_pain, reroll_hits, reroll_wounds, weapon_keywords, wounds_per_model, game_mode (all optional)

Data

All data is embedded at build time — no network calls at runtime.

Game modes

• Warhammer 40,000 (40k) — full-scale battles
• Combat Patrol (combat_patrol) — smaller, starter-friendly format
• Kill Team (kill_team) — squad-level skirmish game

Development

npm install
npm run build
npm test

To refresh unit data from BSData:

npm run fetch-data
npm run build

License

MIT (for the MCP server code).

Unit data sourced from the BSData community project. Game rules and army rules are the intellectual property of Games Workshop. This tool provides reference data for personal use during gameplay.