mcp-server-rubygems
A Model Context Protocol server that allows interaction with the RubyGems.org API to fetch metadata about Ruby packages, search gems, and explore dependencies and ownership information.
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README
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.
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