Paperless-NGX MCP Server

An MCP (Model Context Protocol) server for interacting with a Paperless-NGX API server. This server provides tools for managing documents, tags, correspondents, and document types in your Paperless-NGX instance.

Quick Start

Installation

Add these to your MCP config file:

// STDIO mode (recommended for local or CLI use)

"paperless": {
  "command": "npx",
  "args": [
    "-y",
    "@baruchiro/paperless-mcp@latest",
  ],
  "env": {
    "PAPERLESS_URL": "http://your-paperless-instance:8000",
    "PAPERLESS_API_KEY": "your-api-token",
    "PAPERLESS_PUBLIC_URL": "https://your-public-domain.com"
  }
}

// HTTP mode (recommended for Docker or remote use)

"paperless": {
  "command": "docker",
  "args": [
    "run",
    "-i",
    "--rm",
    "ghcr.io/baruchiro/paperless-mcp:latest",
  ],
  "env": {
    "PAPERLESS_URL": "http://your-paperless-instance:8000",
    "PAPERLESS_API_KEY": "your-api-token",
    "PAPERLESS_PUBLIC_URL": "https://your-public-domain.com"
  }
}

3. Get your API token:

   1. Log into your Paperless-NGX instance
   2. Click your username in the top right
   3. Select "My Profile"
   4. Click the circular arrow button to generate a new token

4. Replace the placeholders in your MCP config:

   • http://your-paperless-instance:8000 with your Paperless-NGX URL
   • your-api-token with the token you just generated
   • https://your-public-domain.com with your public Paperless-NGX URL (optional, falls back to PAPERLESS_URL)

Environment Variables

That's it! Now you can ask Claude to help you manage your Paperless-NGX documents.

Example Usage

Here are some things you can ask Claude to do:

• "Show me all documents tagged as 'Invoice'"
• "Search for documents containing 'tax return'"
• "Create a new tag called 'Receipts' with color #FF0000"
• "Download document #123"
• "List all correspondents"
• "Create a new document type called 'Bank Statement'"

Available Tools

Document Operations

list_documents

Get a paginated list of all documents.

Parameters:

• page (optional): Page number
• page_size (optional): Number of documents per page

list_documents({
  page: 1,
  page_size: 25
})

get_document

Get a specific document by ID.

Parameters:

• id: Document ID

get_document({
  id: 123
})

search_documents

Full-text search across documents.

Parameters:

• query: Search query string

search_documents({
  query: "invoice 2024"
})

download_document

Download a document file by ID.

Parameters:

• id: Document ID
• original (optional): If true, downloads original file instead of archived version

download_document({
  id: 123,
  original: false
})

get_document_thumbnail

Get a document thumbnail (image preview) by ID. Returns the thumbnail as a base64-encoded WebP image resource.

Parameters:

• id: Document ID

get_document_thumbnail({
  id: 123
})

bulk_edit_documents

Perform bulk operations on multiple documents.

Parameters:

• documents: Array of document IDs
• method: One of:
  • set_correspondent: Set correspondent for documents
  • set_document_type: Set document type for documents
  • set_storage_path: Set storage path for documents
  • add_tag: Add a tag to documents
  • remove_tag: Remove a tag from documents
  • modify_tags: Add and/or remove multiple tags
  • delete: Delete documents
  • reprocess: Reprocess documents
  • set_permissions: Set document permissions
  • merge: Merge multiple documents
  • split: Split a document into multiple documents
  • rotate: Rotate document pages
  • delete_pages: Delete specific pages from a document
• Additional parameters based on method:
  • correspondent: ID for set_correspondent
  • document_type: ID for set_document_type
  • storage_path: ID for set_storage_path
  • tag: ID for add_tag/remove_tag
  • add_tags: Array of tag IDs for modify_tags
  • remove_tags: Array of tag IDs for modify_tags
  • permissions: Object for set_permissions with owner, permissions, merge flag
  • metadata_document_id: ID for merge to specify metadata source
  • delete_originals: Boolean for merge/split
  • pages: String for split "[1,2-3,4,5-7]" or delete_pages "[2,3,4]"
  • degrees: Number for rotate (90, 180, or 270)

Examples:

// Add a tag to multiple documents
bulk_edit_documents({
  documents: [1, 2, 3],
  method: "add_tag",
  tag: 5
})

// Set correspondent and document type
bulk_edit_documents({
  documents: [4, 5],
  method: "set_correspondent",
  correspondent: 2
})

// Merge documents
bulk_edit_documents({
  documents: [6, 7, 8],
  method: "merge",
  metadata_document_id: 6,
  delete_originals: true
})

// Split document into parts
bulk_edit_documents({
  documents: [9],
  method: "split",
  pages: "[1-2,3-4,5]"
})

// Modify multiple tags at once
bulk_edit_documents({
  documents: [10, 11],
  method: "modify_tags",
  add_tags: [1, 2],
  remove_tags: [3, 4]
})

// Modify custom fields
bulk_edit_documents({
  documents: [12, 13],
  method: "modify_custom_fields",
  add_custom_fields: [
    { field: 2, value: "year" }
  ],
  remove_custom_fields: []
})

// Set an empty custom field value, e.g. a date field used as a pending marker
bulk_edit_documents({
  documents: [14],
  method: "modify_custom_fields",
  add_custom_fields: [
    { field: 9, value: "" }
  ],
  remove_custom_fields: []
})

post_document

Upload a new document to Paperless-NGX.

Two upload modes:

1. Base64 mode (traditional): Provide file (base64-encoded content) + filename
2. Filesystem mode (efficient): Provide file_path (absolute path on server)

Security Note: When using file_path, set the PAPERLESS_MCP_UPLOAD_PATHS environment variable (colon-separated list of allowed directories) to restrict uploads to specific locations. Without this, any file on the server's filesystem could be uploaded.

Parameters:

• file (optional): Base64 encoded file content. Either file or file_path required.
• file_path (optional): Absolute path to file on server's filesystem. Either file or file_path required.
• filename (optional): Name of the file. Required with file, optional with file_path (derives from path).
• title (optional): Title for the document
• created (optional): DateTime when the document was created (e.g. "2024-01-19" or "2024-01-19 06:15:00+02:00")
• correspondent (optional): ID of a correspondent
• document_type (optional): ID of a document type
• storage_path (optional): ID of a storage path
• tags (optional): Array of tag IDs
• archive_serial_number (optional): Archive serial number
• custom_fields (optional): Array of custom field IDs

File size limit: 100MB for both modes

// Base64 mode (traditional)
post_document({
  file: "base64_encoded_content",
  filename: "invoice.pdf",
  title: "January Invoice",
  created: "2024-01-19",
  correspondent: 1,
  document_type: 2,
  tags: [1, 3],
  archive_serial_number: "2024-001",
  custom_fields: [1, 2]
})

// Filesystem mode (more efficient for large files)
post_document({
  file_path: "/var/uploads/invoice.pdf",
  title: "January Invoice",
  correspondent: 1,
  document_type: 2,
  tags: [1, 3]
})

Tag Operations

list_tags

Get all tags.

list_tags()

create_tag

Create a new tag.

Parameters:

• name: Tag name
• color (optional): Hex color code (e.g. "#ff0000")
• match (optional): Text pattern to match
• matching_algorithm (optional): Number between 0 and 6: 0 - None 1 - Any word 2 - All words 3 - Exact match 4 - Regular expression 5 - Fuzzy word 6 - Automatic

create_tag({
  name: "Invoice",
  color: "#ff0000",
  match: "invoice",
  matching_algorithm: 5
})

Correspondent Operations

list_correspondents

Get all correspondents.

list_correspondents()

create_correspondent

Create a new correspondent.

Parameters:

• name: Correspondent name
• match (optional): Text pattern to match
• matching_algorithm (optional): Number between 0 and 6: 0 - None 1 - Any word 2 - All words 3 - Exact match 4 - Regular expression 5 - Fuzzy word 6 - Automatic

create_correspondent({
  name: "ACME Corp",
  match: "ACME",
  matching_algorithm: 5
})

Document Type Operations

list_document_types

Get all document types.

list_document_types()

create_document_type

Create a new document type.

Parameters:

• name: Document type name
• match (optional): Text pattern to match
• matching_algorithm (optional): Number between 0 and 6: 0 - None 1 - Any word 2 - All words 3 - Exact match 4 - Regular expression 5 - Fuzzy word 6 - Automatic

create_document_type({
  name: "Invoice",
  match: "invoice total amount due",
  matching_algorithm: 1
})

Custom Field Operations

list_custom_fields

Get all custom fields.

list_custom_fields()

get_custom_field

Get a specific custom field by ID.

Parameters:

• id: Custom field ID

get_custom_field({
  id: 1
})

create_custom_field

Create a new custom field.

Parameters:

• name: Custom field name
• data_type: One of "string", "url", "date", "boolean", "integer", "float", "monetary", "documentlink", "select"
• extra_data (optional): Extra data for the custom field, such as select options

create_custom_field({
  name: "Invoice Number",
  data_type: "string"
})

update_custom_field

Update an existing custom field.

Parameters:

• id: Custom field ID
• name (optional): New custom field name
• data_type (optional): New data type
• extra_data (optional): Extra data for the custom field

update_custom_field({
  id: 1,
  name: "Updated Invoice Number",
  data_type: "string"
})

delete_custom_field

Delete a custom field.

Parameters:

• id: Custom field ID

delete_custom_field({
  id: 1
})

bulk_edit_custom_fields

Perform bulk operations on multiple custom fields.

Parameters:

• custom_fields: Array of custom field IDs
• operation: One of "delete"

bulk_edit_custom_fields({
  custom_fields: [1, 2, 3],
  operation: "delete"
})

Mail Operations

Tools for managing Paperless mail accounts and the mail rules that drive automatic email ingestion. Account passwords/tokens are never exposed: they are redacted from every tool response.

list_mail_accounts

List mail accounts so you can pick the account ID needed when creating a mail rule. Passwords are redacted.

Parameters:

• page (optional): Page number
• page_size (optional): Number of results per page

list_mail_accounts()

get_mail_account

Get a single mail account by ID. Password/token fields are redacted.

Parameters:

• id: Mail account ID

get_mail_account({
  id: 1
})

process_mail_account

Manually trigger Paperless mail processing for one account. This can consume matching mails according to the account's enabled mail rules.

Parameters:

• id: Mail account ID

process_mail_account({
  id: 1
})

list_mail_rules

List mail rules with optional pagination.

Parameters:

• page (optional): Page number
• page_size (optional): Number of results per page

list_mail_rules()

get_mail_rule

Get a single mail rule by ID.

Parameters:

• id: Mail rule ID

get_mail_rule({
  id: 1
})

create_mail_rule

Create a mail rule. Use list_mail_accounts first to choose the account.

Required parameters:

• name: Rule name
• account: Mail account ID
• folder: IMAP folder to scan (e.g. "INBOX")

Common optional parameters:

• enabled (default true): Whether the rule is active
• filter_from / filter_to / filter_subject / filter_body: Match incoming mail
• maximum_age: Only process mail newer than this many days
• action: 1=Delete, 2=Move to folder, 3=Mark as read, 4=Flag, 5=Tag
• action_parameter: Target folder/tag for the chosen action
• assign_title_from: 1=Subject, 2=Attachment filename, 3=Do not assign
• assign_tags / assign_correspondent / assign_document_type: Metadata to apply
• assign_correspondent_from: 1=None, 2=Mail address, 3=Sender name, 4=Use assign_correspondent
• attachment_type: 1=Attachments only, 2=All files incl. inline
• consumption_scope: 1=Attachments only, 2=Full mail as .eml, 3=Both
• pdf_layout: 0=System default, 1=Text+HTML, 2=HTML+text, 3=HTML only, 4=Text only

create_mail_rule({
  name: "Invoices",
  account: 1,
  folder: "INBOX",
  filter_subject: "invoice",
  action: 3,
  attachment_type: 1
})

update_mail_rule

Patch an existing mail rule. Only the fields you supply are changed.

Parameters:

• id: Mail rule ID
• ...any of the create_mail_rule fields to update

update_mail_rule({
  id: 1,
  enabled: false
})

delete_mail_rule

Delete a mail rule. Requires an explicit confirmation flag. This changes future mail ingestion behavior but does not delete any existing documents.

Parameters:

• id: Mail rule ID
• confirm: Must be true to confirm deletion

delete_mail_rule({
  id: 1,
  confirm: true
})

Error Handling

The server will show clear error messages if:

• The Paperless-NGX URL or API token is incorrect
• The Paperless-NGX server is unreachable
• The requested operation fails
• The provided parameters are invalid

Testing

Unit tests

Run the unit test suite (no external dependencies required):

npm test

E2E tests

The E2E suite boots an empty Paperless-ngx instance, runs the compiled MCP server, and drives a deterministic serial scenario through tools/call requests — creating a tag, correspondent, and document type, uploading a PDF, then exercising list / get / search / download / thumbnail / bulk-edit on the same document. No LLM and no Paperless REST client outside MCP.

Prerequisites: Docker, Docker Compose, and jq.

# 1. Build the MCP server
npm run build

# 2. Start Paperless-ngx
docker compose -f docker-compose.e2e.yml up -d

# 3. Wait for Paperless to be ready, then get a token
TOKEN=$(curl -s -X POST http://localhost:8000/api/token/ \
  -H 'Content-Type: application/json' \
  -d '{"username":"admin","password":"admin123"}' | jq -r '.token')

# 4. Start the MCP server
node build/index.js --http --port 3001 \
  --baseUrl http://localhost:8000 --token "$TOKEN" &
MCP_PID=$!

# 5. Run the E2E tests
MCP_URL=http://localhost:3001/mcp \
PAPERLESS_URL=http://localhost:8000 \
PAPERLESS_TOKEN="$TOKEN" \
npm run test:e2e

# 6. Cleanup
kill "$MCP_PID"
docker compose -f docker-compose.e2e.yml down -v

E2E tests also run automatically in CI on every pull request and push to main, covering both the build/index.js CLI and the published Docker image.

Development

Want to contribute or modify the server? Here's what you need to know:

1. Clone the repository
2. Install dependencies:

npm install

3. Make your changes to server.js
4. Test locally:

node server.js http://localhost:8000 your-test-token

The server is built with:

• litemcp: A TypeScript framework for building MCP servers
• zod: TypeScript-first schema validation

API Documentation

This MCP server implements endpoints from the Paperless-NGX REST API. For more details about the underlying API, see the official documentation.

Running the MCP Server

The MCP server can be run in two modes:

1. stdio (default)

This is the default mode. The server communicates over stdio, suitable for CLI and direct integrations.

npm run start -- <baseUrl> <token>

2. HTTP (Streamable HTTP Transport)

To run the server as an HTTP service, use the --http flag. You can also specify the port with --port (default: 3000). This mode requires Express to be installed (it is included as a dependency).

npm run start -- <baseUrl> <token> --http --port 3000

• The MCP API will be available at POST /mcp on the specified port.
• Each request is handled statelessly, following the StreamableHTTPServerTransport pattern.
• GET and DELETE requests to /mcp will return 405 Method Not Allowed.

Per-request API token (HTTP/Docker mode)

In HTTP mode, clients authenticate by supplying a Paperless-NGX API token via the standard Authorization header:

Authorization: Bearer <paperless-ngx-api-token>

The token is passed straight through to Paperless-NGX, so each client's own Paperless permissions are enforced end-to-end. This lets a single server instance serve multiple users, each with their own token. The same behaviour applies to both /mcp and /sse endpoints.

⚠️ Breaking change in v2.0.0 — HTTP mode is now authenticated by default.

Previously, a request with no Authorization header silently fell back to the server-configured PAPERLESS_API_KEY, which left the HTTP endpoint open to anyone who could reach the port. As of v2.0.0, requests without a Bearer token are rejected with 401 Unauthorized. The server token is never used for unauthenticated requests unless you explicitly opt in with --no-auth.

Migrating from v1.x: if you relied on the old fallback (a single shared PAPERLESS_API_KEY with clients that don't send a token), you have two options:

1. Recommended: have each client send Authorization: Bearer <paperless-token>.
2. Restore the old behaviour (trusted/local networks only): start the server with the --no-auth flag, e.g. append it to the Docker command/args or your CLI invocation. This requires a server token (PAPERLESS_API_KEY or --token) to be configured.

services:
  paperless-mcp:
    container_name: paperless-mcp
    image: ghcr.io/baruchiro/paperless-mcp:latest
    environment:
      - PAPERLESS_URL=http://your-paperless-ngx-server:8000
      - PAPERLESS_API_KEY=your-paperless-api-key
      - PAPERLESS_PUBLIC_URL=https://paperless-ngx.yourpublicurl.com
    ports:
      - "3000:3000"
    restart: unless-stopped

docker-compose up -d

name: Paperless
version: 0.0.1
schema: v1
mcpServers:
  - name: Paperless
    type: sse
    url: http://localhost:3000/sse

Credits

This project is a fork of nloui/paperless-mcp. Many thanks to the original author for their work. Contributions and improvements may be returned upstream.

Debugging

To debug the MCP server in VS Code, use the following launch configuration:

{
    "type": "node",
    "request": "launch",
    "name": "Debug Paperless MCP (HTTP, ts-node ESM)",
    "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
    "args": [
        "--esm",
        "src/index.ts",
        "--http",
        "--baseUrl",
        "http://your-paperless-instance:8000",
        "--token",
        "your-api-token",
        "--port",
        "3002"
    ],
    "env": {
        "NODE_OPTIONS": "--loader ts-node/esm",
    },
    "console": "integratedTerminal",
    "skipFiles": [
        "<node_internals>/**"
    ]
}

Important: Before debugging, uncomment the following line in src/index.ts (around line 175):

// await new Promise((resolve) => setTimeout(resolve, 1000000));

This prevents the server from exiting immediately and allows you to set breakpoints and debug the code.