yjacquin/fast-mcp

Health v2 · maintenance only

Adoption not part of the score

1187 stars · 106 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Fast MCP is a Ruby implementation of the Model Context Protocol (MCP), letting AI models call Ruby tools and read app resources. It supports STDIO, HTTP, and SSE transports and integrates with Rails, Sinatra, or any Rack app.

Use cases

• expose ruby methods as tools for llms
• add mcp server to a rails app
• connect claude or other ai clients to my ruby backend
• share application data as mcp resources
• secure ai endpoints with authentication
• filter mcp tools by user permissions

When to choose

• you have a Ruby or Rack-based application you want LLMs to interact with
• you need MCP tool/resource support with argument validation
• you want multiple transport options (STDIO, HTTP, SSE)

When to avoid

• your stack is Python, TypeScript, or another non-Ruby language
• you need an MCP client rather than a server
• you need features beyond tools/resources such as sampling

Facets

library · maturity active

mcp agent-framework middleware auth api-framework large-language-models backend web-development developer-tools ruby cli model-context-protocol rack rails sinatra stdio-transport sse dry-schema tools-and-resources ai-agents web-server

Member repositories

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markdown · JSON · MCP: product_card(name="yjacquin/fast-mcp")