rack-mcp

A Ruby gem that implements the Model Context Protocol (MCP) to provide AI assistants with Ruby code execution capabilities. Works with Rails, Sinatra, Hanami, Roda, and any other Rack-based framework. The code is executed in your application's context for debugging and investigation. Think of it giving AI assistant lighting-speed access to ruby console without the need to write script, reload or restart.

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Last updated: 1/27/2026

Installation

Add this MCP to your configuration:

{
  "mcpServers": {
    "rack-mcp": {
      // See GitHub repository for configuration
    }
  }
}