mcp-server-rubygems

A Model Context Protocol server for fetching rubygems metadata via rubygems.org API.

Tools

This MCP server provides the following tools for interacting with the RubyGems.org API:

Tool	Description
get_rubygem_info	Get information about a RubyGem
search_rubygems	Search for RubyGems matching a query string
get_gem_versions	Get all available versions of a specific RubyGem
get_gem_reverse_dependencies	Get gems that depend on a specific RubyGem
get_owner_gems	Get all RubyGems owned by a specific user or organization
get_gem_owners	Get the owners of a specific RubyGem

Usage

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-server-rubygems": {
      "command": "/path/to/mcp-server-rubygems/build/index.js"
    }
  }
}

It should be similar on MCP clients like Cursor, Cline, etc -- just add the command from above in your config.

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.