docs-mcp-server

Docs MCP Server: Your AI's Up-to-Date Documentation Expert

AI coding assistants often struggle with outdated documentation and hallucinations. The Docs MCP Server solves this by providing a personal, always-current knowledge base for your AI. It indexes 3rd party documentation from various sources (websites, GitHub, npm, PyPI, local files) and offers powerful, version-aware search tools via the Model Context Protocol (MCP).

This enables your AI agent to access the latest official documentation, dramatically improving the quality and reliability of generated code and integration details. It's free, open-source, runs locally for privacy, and integrates seamlessly into your development workflow.

Why Use the Docs MCP Server?

LLM-assisted coding promises speed and efficiency, but often falls short due to:

• 🌀 Stale Knowledge: LLMs train on snapshots of the internet and quickly fall behind new library releases and API changes.
• 👻 Code Hallucinations: AI can invent plausible-looking code that is syntactically correct but functionally wrong or uses non-existent APIs.
• ❓ Version Ambiguity: Generic answers rarely account for the specific version dependencies in your project, leading to subtle bugs.
• ⏳ Verification Overhead: Developers spend valuable time double-checking AI suggestions against official documentation.

Docs MCP Server solves these problems by:

• ✅ Providing Up-to-Date Context: Fetches and indexes documentation directly from official sources (websites, GitHub, npm, PyPI, local files) on demand.
• 🎯 Delivering Version-Specific Answers: Search queries can target exact library versions, ensuring information matches your project's dependencies.
• 💡 Reducing Hallucinations: Grounds the LLM in real documentation for accurate examples and integration details.
• ⚡ Boosting Productivity: Get trustworthy answers faster, integrated directly into your AI assistant workflow.

✨ Key Features

• Accurate & Version-Aware AI Responses: Provides up-to-date, version-specific documentation to reduce AI hallucinations and improve code accuracy.
• Broad Source Compatibility: Scrapes documentation from websites, GitHub repos, package manager sites (npm, PyPI), and local file directories.
• Advanced Search & Processing: Intelligently chunks documentation semantically, generates embeddings, and combines vector similarity with full-text search.
• Flexible Embedding Models: Supports various providers including OpenAI (and compatible APIs), Google Gemini/Vertex AI, Azure OpenAI, and AWS Bedrock.
• Web Interface: Easy-to-use web interface for searching and managing documentation.
• Local & Private: Runs entirely on your machine, ensuring data and queries remain private.
• Free & Open Source: Community-driven and freely available.
• Simple Deployment: Easy setup via Docker or npx.
• Seamless Integration: Works with MCP-compatible clients (like Claude, Cline, Roo).

What is semantic chunking?

Semantic chunking splits documentation into meaningful sections based on structure—like headings, code blocks, and tables—rather than arbitrary text size. Docs MCP Server preserves logical boundaries, keeps code and tables intact, and removes navigation clutter from HTML docs. This ensures LLMs receive coherent, context-rich information for more accurate and relevant answers.

How to Run the Docs MCP Server

Choose your deployment method:

• Standalone Server (Recommended)
• Embedded Server
• Advanced: Docker Compose (Scaling)

Standalone Server (Recommended)

Run a standalone server that includes both MCP endpoints and web interface in a single process. This is the easiest way to get started.

Option 1: Docker

1. Install Docker.
2. Start the server:
   docker run --rm \ -e OPENAI_API_KEY="your-openai-api-key" \ -v docs-mcp-data:/data \ -p 6280:6280 \ ghcr.io/arabold/docs-mcp-server:latest \ --protocol http --port 6280
   Replace your-openai-api-key with your actual OpenAI API key.

Option 2: npx

1. Install Node.js 22.x or later.
2. Start the server:
   OPENAI_API_KEY="your-openai-api-key" npx @arabold/docs-mcp-server@latest
   Replace your-openai-api-key with your actual OpenAI API key.This will run the server on port 6280 by default.

Configure Your MCP Client

Add this to your MCP settings (VS Code, Claude Desktop, etc.):

Alternative connection types:

Restart your AI assistant after updating the config.

Access the Web Interface

Open http://localhost:6280 in your browser to manage documentation and monitor jobs.

CLI Usage with Standalone Server

You can also use CLI commands to interact with the local database:

Adding Library Documentation

1. Open the Web Interface at http://localhost:6280.
2. Use the "Queue New Scrape Job" form.
3. Enter the documentation URL, library name, and (optionally) version.
4. Click "Queue Job". Monitor progress in the Job Queue.
5. Repeat for each library you want indexed.

Once a job completes, the docs are searchable via your AI assistant or the Web UI.

Benefits:

• Single command setup with both web UI and MCP server
• Persistent data storage (Docker volume or local directory)
• No repository cloning required
• Full feature access including web interface

To stop the server, press Ctrl+C.

Embedded Server

Run the MCP server directly embedded in your AI assistant without a separate process or web interface. This method provides MCP integration only.

Configure Your MCP Client

Add this to your MCP settings (VS Code, Claude Desktop, etc.):

Replace sk-proj-... with your OpenAI API key and restart your application.

Adding Library Documentation

Option 1: Use MCP Tools

Your AI assistant can index new documentation using the built-in scrape_docs tool:

Option 2: Launch Web Interface

Start a temporary web interface that shares the same database:

Then open http://localhost:6281 to manage documentation. Stop the web interface when done (Ctrl+C).

Option 3: CLI Commands

Use CLI commands directly (avoid running scrape jobs concurrently with embedded server):

Benefits:

• Direct integration with AI assistant
• No separate server process required
• Persistent data storage in user's home directory
• Shared database with standalone server and CLI

Limitations:

• No web interface (unless launched separately)
• Documentation indexing requires MCP tools or separate commands

Scraping Local Files and Folders

You can index documentation from your local filesystem by using a file:// URL as the source. This works in both the Web UI and CLI.

Examples:

• Web: https://react.dev/reference/react
• Local file: file:///Users/me/docs/index.html
• Local folder: file:///Users/me/docs/my-library

Requirements:

• All files with a MIME type of text/* are processed. This includes HTML, Markdown, plain text, and source code files such as .js, .ts, .tsx, .css, etc. Binary files, PDFs, images, and other non-text formats are ignored.
• You must use the file:// prefix for local files/folders.
• The path must be accessible to the server process.
• If running in Docker:
  • You must mount the local folder into the container and use the container path in your file:// URL.
  • Example Docker run:
    docker run --rm \ -e OPENAI_API_KEY="your-key" \ -v /absolute/path/to/docs:/docs:ro \ -v docs-mcp-data:/data \ ghcr.io/arabold/docs-mcp-server:latest \ scrape mylib file:///docs/my-library
  • In the Web UI, enter the path as file:///docs/my-library (matching the container path).

See the tooltips in the Web UI and CLI help for more details.

Advanced: Docker Compose (Scaling)

For production deployments or when you need to scale processing, use Docker Compose to run separate services. The system selects a local in-process worker or a remote worker client based on configuration, keeping behavior consistent across modes.

Start the services:

Service architecture:

• Worker (port 8080): Handles documentation processing jobs
• MCP Server (port 6280): Provides /sse endpoint for AI tools
• Web Interface (port 6281): Browser-based management interface

Configure your MCP client:

Alternative connection types:

Access interfaces:

• Web Interface: http://localhost:6281
• MCP Endpoint (HTTP): http://localhost:6280/mcp
• MCP Endpoint (SSE): http://localhost:6280/sse

This architecture allows independent scaling of processing (workers) and user interfaces.

Configuration

The Docs MCP Server is configured via environment variables. Set these in your shell, Docker, or MCP client config.

See examples above for usage.

Embedding Model Options

Set DOCS_MCP_EMBEDDING_MODEL to one of:

• text-embedding-3-small (default, OpenAI)
• openai:snowflake-arctic-embed2 (OpenAI-compatible, Ollama)
• vertex:text-embedding-004 (Google Vertex AI)
• gemini:embedding-001 (Google Gemini)
• aws:amazon.titan-embed-text-v1 (AWS Bedrock)
• microsoft:text-embedding-ada-002 (Azure OpenAI)
• Or any OpenAI-compatible model name

Provider-Specific Configuration Examples

Here are complete configuration examples for different embedding providers:

OpenAI (Default):

Ollama (Local):

LM Studio (Local):

Google Gemini:

Google Vertex AI:

AWS Bedrock:

Azure OpenAI:

For more architectural details, see the ARCHITECTURE.md.

Development

To develop or contribute to the Docs MCP Server:

• Fork the repository and create a feature branch.
• Follow the code conventions in ARCHITECTURE.md.
• Write clear commit messages (see Git guidelines above).
• Open a pull request with a clear description of your changes.

For questions or suggestions, open an issue.

Architecture

For details on the project's architecture and design principles, please see ARCHITECTURE.md.

Notably, the vast majority of this project's code was generated by the AI assistant Cline, leveraging the capabilities of this very MCP server.

License

This project is licensed under the MIT License. See LICENSE for details.