ActionMCP MCP Server

Rails Engine with MCP compliant Spec.

What the server does

ActionMCP is designed for production Rails environments and does not support STDIO transport. STDIO is not included because it is not production-ready and is only suitable for desktop or script-based use cases. Instead, ActionMCP is built for robust, network-based deployments.

Think of it as a universal interface for connecting AI assistants to external data sources and tools.

Available tools

The toolset is worth reading before you wire it up, because it tells you what the integration is really for:

• Pagination — All list endpoints (tools/list, prompts/list, resources/list, resources/templates/list) support cursor-b

Credentials and setup notes

• Ruby: 3.4.8+ or 4.0.0+ - Rails: 8.1.1+ - Database: PostgreSQL, MySQL, or SQLite3 ActionMCP is tested against Ruby 3.4.8 and 4.0.0 with Rails 8.1.1+.

Where it fits

Worth knowing first

• It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
• Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Setup and compatibility

This listing has no verified copy-paste launch configuration. Use the project documentation to confirm the entry point, runtime and authentication before registering it in your MCP client. A package name or repository alone is not a runnable configuration.

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