Ligament/npm-package-mcp-server

📦 NPM Package MCP Server

A powerful Model Context Protocol (MCP) server that enables AI assistants to fetch, explore, and analyze source code from any NPM package in real-time.

🚀 Quick Start

# Install
npm install -g npm-package-mcp-server

# Run
npm-package-mcp-server

✨ Features

• 📦 Fetch Any NPM Package: Download and explore source code from millions of packages
• 🔍 Smart File Discovery: List and filter files with intelligent code detection
• 📄 Selective Code Reading: Get specific files or entire codebases
• 🏷️ Version Control: Support for any published package version
• 🧹 Auto Cleanup: Automatic temporary file management
• 🔒 Type Safe: Full TypeScript support with comprehensive error handling
• ⚡ ES Modules: Modern JavaScript with optimal performance
• 🤖 AI-Ready: Perfect integration with Claude, ChatGPT, and other AI assistants

🎯 Use Cases

• Code Analysis: Analyze libraries before adopting them
• Learning: Study well-written open source code
• AI Development: Enable AI assistants to understand package internals
• Documentation: Generate docs by analyzing source code
• Security Auditing: Review dependencies for security issues
• Migration Planning: Understand APIs when upgrading packages

📖 API Reference

Tools Available

get_npm_package_code

## 🔧 Installation & Setup

### Option 1: Global Installation
```bash
npm install -g npm-package-mcp-server
npm-package-mcp-server

Option 2: Local Development

git clone https://github.com/Ligament/npm-package-mcp-server.git
cd npm-package-mcp-server
npm install
npm run build
npm start

Option 3: Docker

docker run -it npm-package-mcp-server

🤖 AI Assistant Integration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "npm-packages": {
      "command": "npm-package-mcp-server"
    }
  }
}

Other MCP Clients

Works with any MCP-compatible client. Configure stdio transport with the server command.

🏗️ Architecture

graph TD
    A[AI Assistant] --> B[MCP Client]
    B --> C[NPM Package MCP Server]
    C --> D[NPM Registry]
    C --> E[Package Extraction]
    C --> F[File System]
    E --> G[Code Analysis]
    G --> A

📊 Supported Packages

• ✅ All public NPM packages
• ✅ Scoped packages (@org/package)
• ✅ Any published version
• ✅ TypeScript and JavaScript
• ✅ React, Vue, Angular, Node.js packages
• ✅ Monorepo packages

🔥 Popular Packages to Explore

Try these commands with your AI assistant:

"Analyze the lodash utility functions"
"Show me the React hooks implementation"
"Explore the Express.js middleware system"
"Review the TypeScript compiler source"

🛠️ Development

Scripts

npm run build      # Compile TypeScript
npm run dev        # Development with hot reload
npm run test       # Run tests
npm run clean      # Clean build artifacts

Contributing

1. Fork the repository
2. Create feature branch: git checkout -b feature/amazing-feature
3. Commit changes: git commit -m 'Add amazing feature'
4. Push to branch: git push origin feature/amazing-feature
5. Open a Pull Request

📈 Performance

• Fast Downloads: Optimized npm registry API usage
• Memory Efficient: Streams large packages
• Smart Caching: Temporary file management
• Error Recovery: Robust error handling

🔒 Security

• Read-Only: Never modifies packages
• Sandboxed: Temporary extraction directories
• No Execution: Only reads source code
• Public Packages Only: No private registry access

🐛 Troubleshooting

📄 License

MIT © Ligament

🌟 Star History

🤝 Related Projects

• Model Context Protocol
• Claude Desktop
• NPM Registry API