Cargo Package README MCP Server

A Model Context Protocol (MCP) server for retrieving README files and package information from Rust crates on crates.io with comprehensive documentation extraction.

Features

• README Extraction: Retrieve complete README content and documentation from Rust crates
• Package Information: Access detailed package metadata, dependencies, and version information
• Crate Search: Search for Rust crates with filtering and sorting capabilities
• GitHub Integration: Automatic fallback to GitHub repositories for additional documentation
• Smart Caching: Built-in caching system for improved performance and reduced API calls
• Error Handling: Comprehensive error handling with detailed error messages

MCP Client Configuration

Add this server to your MCP client configuration:

{
  "mcpServers": {
    "cargo-package-readme": {
      "command": "npx",
      "args": ["cargo-package-readme-mcp-server"]
    }
  }
}

Available Tools

get_package_readme

Retrieves README content and documentation for a Rust crate from crates.io with automatic GitHub fallback.

Parameters:

• package_name (required): Name of the Rust crate to retrieve README for
• version (optional): Specific version of the crate (default: latest)

Examples:

Basic README retrieval:

{
  "name": "get_package_readme",
  "arguments": {
    "package_name": "serde"
  }
}

Specific version:

{
  "name": "get_package_readme", 
  "arguments": {
    "package_name": "tokio",
    "version": "1.0.0"
  }
}

get_package_info

Retrieves detailed package information including metadata, dependencies, and download statistics.

Parameters:

• package_name (required): Name of the Rust crate
• include_dependencies (optional): Include dependency information (default: true)

Example:

{
  "name": "get_package_info",
  "arguments": {
    "package_name": "actix-web",
    "include_dependencies": true
  }
}

search_packages

Search for Rust crates on crates.io with filtering and sorting options.

Parameters:

• query (required): Search query string
• limit (optional): Maximum number of results (1-100, default: 20)
• sort (optional): Sort order - "relevance", "downloads", "recent-downloads", "recent-updates" (default: "relevance")

Example:

{
  "name": "search_packages",
  "arguments": {
    "query": "web framework",
    "limit": 10,
    "sort": "downloads"
  }
}

Error Handling

Common error scenarios:

• Package not found on crates.io
• Network connection issues
• Invalid package names or versions
• GitHub API rate limits
• Malformed README content

License

MIT