Rails MCP Server: Install & Setup

Install Rails in Claude Code

Claude Code

claude mcp add rails -- uvx rails-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "rails": {
      "command": "uvx",
      "args": [
        "rails-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Rails MCP server do?

Self-hosted default-deny action registry, append-only spend-intent ledger and human sign-off audit trail for gating irreversible agent actions.

Is the Rails MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Rails run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Rails to Claude Code?

Run: claude mcp add rails -- uvx rails-mcp

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