DocsFetcher MCP Server

📚 DocsFetcher MCP Server

An MCP server that fetches package documentation from multiple language ecosystems for LLMs like Claude without requiring API keys.

✨ Features

• 🌐 Supports multiple programming languages (JavaScript, Python, Java, .NET, Ruby, PHP, Rust, Go, Swift)
• 📦 Fetches documentation for packages by name or URL
• 🔍 Crawls documentation sites to extract comprehensive information
• 📄 Extracts README, API docs, code examples, and repository info
• 🧠 Provides structured data for LLM summarization
• 💬 Includes specialized prompts for documentation analysis
• 🔑 No API key required - works natively with Claude Desktop and Cursor IDE

🚀 Installation

Claude Desktop

1. Open Claude Desktop → Settings → Developer
2. Click "Edit Config" and add:

Cursor IDE Configuration

1. Open Cursor IDE → Settings → MCP -> Add New MCP Servier
2. Add:

Prerequisites

• 📋 Node.js 18 or later

🏃‍♂️ Running Locally

Once installed, you can run the server locally with:

For development with auto-restart on file changes:

The server will start on the default port (usually 3000). You should see output like:

To specify a custom port:

🛠️ Available Tools

1. fetch-url-docs: 🔗 Fetch docs from a specific URL
2. fetch-package-docs: 📦 Fetch docs for a package with optional language specification
3. fetch-library-docs: 🧠 Smart tool that works with either package name or URL
4. fetch-multilingual-docs: 🌍 Fetch docs for a package across multiple language ecosystems

📝 Available Prompts

1. summarize-library-docs: 📚 Create a comprehensive library summary
2. explain-dependency-error: 🐛 Generate dependency error explanations

💡 Example Queries

Basic Library Information

• "What is Express.js and how do I use it?"
• "Tell me about the React library"
• "How do I use requests in Python?"

Multi-language Support

• "Show me documentation for lodash in JavaScript"
• "Compare pandas in Python and data.table in R"

Using Tools

• "@fetch-package-docs with packageName='express' and language='javascript'"
• "@fetch-package-docs with packageName='requests' and language='python'"
• "@fetch-multilingual-docs with packageName='http' and languages=['javascript', 'python', 'rust']"

Using Prompts

• "@summarize-library-docs with libraryName='express'"
• "@explain-dependency-error with packageName='dotenv'"

❓ Troubleshooting

Local Installation

• Server not showing up: ✅ Verify absolute path in configuration
• Connection errors: 🔄 Restart Claude Desktop or Cursor IDE
• Fetch failures: ⚠️ Some packages may have non-standard documentation
• Language support: 🌐 If a language isn't working, try using the package's direct URL

📄 License

MIT