DocMCP

Index any documentation website and search it from AI coding assistants via the Model Context Protocol (MCP).

Features

• Crawl & Index: Automatically crawl documentation sites via sitemap or recursive links

• Hybrid Search: Combines BM25 keyword search with vector embeddings for best results

• MCP Integration: Works with Claude Code, Claude Desktop, Cursor, and any MCP-compatible tool

• Multiple Providers: Anthropic (Voyage), OpenAI, or BM25-only (zero setup)

• Cross-Platform: Works on macOS, Linux, and Windows

Installation

npm install -g @pieeee/docmcp

Requirements

• Node.js 20+

• One of: Anthropic API key, OpenAI API key, or use BM25-only mode (no API needed)

Quick Start

# Initial setup
docmcp init

# Index a documentation site
docmcp add https://tailwindcss.com/docs

# List indexed docs
docmcp list

MCP Configuration

Claude Code

claude mcp add docmcp -- docmcp serve

Or add to your project's .mcp.json:

{
  "mcpServers": {
    "docmcp": {
      "command": "docmcp",
      "args": ["serve"]
    }
  }
}

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "docmcp": {
      "command": "docmcp",
      "args": ["serve"]
    }
  }
}

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "docmcp": {
      "command": "docmcp",
      "args": ["serve"]
    }
  }
}

CLI Commands

Add Command Options

docmcp add <url> [options]

Options:
  -n, --name <name>           Override auto-detected doc name
  -d, --depth <number>        Max crawl depth (default: 10)
  -m, --max-pages <number>    Max pages to crawl (default: unlimited)
  -i, --include <pattern...>  Only crawl URLs matching pattern (glob)
  -e, --exclude <pattern...>  Skip URLs matching pattern (glob)
  --delay <ms>                Delay between requests (default: 200)
  --concurrency <number>      Parallel requests (default: 3)
  --no-sitemap                Skip sitemap, force recursive crawl
  --openapi                   Treat URL as OpenAPI/Swagger JSON spec

OpenAPI/Swagger Support

You can index OpenAPI specs directly:

docmcp add https://api.example.com/openapi.json --openapi
docmcp add https://petstore.swagger.io/v2/swagger.json --openapi

This parses the spec and indexes all endpoints, parameters, and schemas for search.

MCP Tools

When connected as an MCP server, DocMCP exposes these tools:

search_docs

Search your indexed documentation:

search_docs(query: "how to center a div", doc?: "Tailwind", limit?: 5)

Parameters:

• query (required): Search query

• doc (optional): Filter to specific documentation

• limit (optional): Max results (default: 5)

Embedding Providers

Set your API key as an environment variable or enter it during docmcp init.

Data Storage

All data is stored in ~/.docmcp/:

~/.docmcp/
├── config.json    # Configuration (API keys stored here)
└── db/
    └── docs.db    # SQLite database with FTS5 + vector search

Platform Support

Windows Prerequisites

If installation fails on Windows due to native module compilation:

1. Install Visual Studio Build Tools

2. Or run: npm install --global windows-build-tools

3. Retry: npm install -g docmcp

How It Works

1. Crawl: DocMCP crawls documentation sites using sitemap or recursive link following

2. Parse: HTML is cleaned and converted to Markdown, preserving code blocks

3. Chunk: Content is split at heading boundaries into ~512 token chunks

4. Index: Chunks are stored in SQLite with FTS5 (BM25) and vector embeddings

5. Search: Queries use hybrid search combining keyword and semantic matching

Contributing

See CONTRIBUTING.md for development setup and guidelines.

License

MIT - see LICENSE for details.