Ruby MCP SDK

The official Ruby SDK for building Model Context Protocol (MCP) servers and clients. This SDK provides elegant, Ruby-idiomatic APIs for creating beautiful MCP applications with full gem ecosystem integration.

Features

• Native Ruby implementation with blocks and iterators
• Thread-safe server and client implementations
• Built-in Rack middleware for web integration
• RSpec testing utilities and matchers
• ActiveRecord integration for Rails applications
• Comprehensive logging with Ruby Logger
• Gem-based plugin architecture

Installation

Add to your Gemfile:

gem 'mcp-ruby-sdk'

Or install directly:

gem install mcp-ruby-sdk

Getting Started

Build elegant MCP applications in Ruby with full Rails integration, perfect for web applications and Ruby-based automation tools.

Rails Integration

• Controllers: MCP action integration
• ActiveRecord: Model-based MCP servers
• Middleware: Request/response processing
• Background Jobs: Sidekiq/Resque integration

Learning Resources

Get started with Ruby MCP development using these comprehensive guides:

• Building Your First MCP Server: Create your first Ruby MCP server in 5 minutes
• Rails ActiveRecord Integration: Expose your database models to AI agents safely
• Tools vs. Resources Explained: Understand MCP primitives with Ruby analogies
• RSpec Testing Strategies: Test your MCP tools without needing Claude
• Stdio vs. SSE Transport: Choose the right transport for local dev and production