MCP Ruby Server Skeleton

What is MCP Ruby Server Skeleton?

The MCP Ruby Server Skeleton is a Ruby implementation of a Model Context Protocol (MCP) server that provides an interface for Large Language Models (LLMs) like Claude to call tools. It is designed for developers who want to build custom MCP servers in Ruby, starting with a built‑in tool that generates random numbers.

How to use MCP Ruby Server Skeleton?

Clone the repository, make the server script executable (chmod +x bin/run_server.rb), then run it directly with ./bin/run_server.rb or integrate it with Claude Desktop by adding a configuration entry to claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/claude_desktop_config.json, Windows: %APPDATA%\Claude\claude_desktop_config.json). After restarting Claude Desktop, you can prompt it to generate a random number.

Key features of MCP Ruby Server Skeleton

• Built‑in get-random-number tool (generates random integer between 1 and a specified max)
• MCP protocol version 2024‑11‑05 compatibility
• JSON‑RPC 2.0 compliant message handling
• Detailed logging via STDERR for debugging
• Standard I/O transport layer for communication
• Extensible architecture for adding custom tools

Use cases of MCP Ruby Server Skeleton

• Provide LLMs with a random number generation tool
• Serve as a starting template for building custom MCP servers in Ruby
• Integrate with Claude Desktop to extend its capabilities
• Test and prototype MCP protocol interactions in Ruby