rails-mcp-server: A Ruby gem implementation of a Model Context Protocol (MCP) server for Rails projects

by maquina-app · MCP Server · ★ 573

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How to install rails-mcp-server

gem install rails-mcp-server

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 75/100

Flagged: sudo usage. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

Quick Facts

Stars573
Forks36
LanguageRuby
CategoryMCP Server
LicenseMIT
Quality Score75/100
Open Issues2
Last Updated2026-09-28
Created2025-03-20
Platformsmcp, ruby
Est. Tokens~18k

About rails-mcp-server

Rails MCP Server A Ruby implementation of a Model Context Protocol (MCP) server for Rails projects. This server allows LLMs (Large Language Models) to interact with Rails projects through the Model Context Protocol, providing capabilities for code analysis, exploration, and development assistance.

Compatible Skills

These tools work well together with rails-mcp-server for enhanced workflows:

  • ruby-sdk — semantic(0.31)+complementary+same_lang+similar_pop+shared_platform (56%)
  • ruby_llm-agents — semantic(0.22)+complementary+same_lang+similar_pop+shared_platform (53%)
  • ruby_llm — semantic(0.19)+complementary+same_lang+similar_pop+shared_platform (52%)
  • fast-mcp — semantic(0.46)+same_lang+similar_pop+shared_platform (46%)

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

View on GitHub → Browse MCP Server tools