Railagent MCP Server

A Model Context Protocol (MCP) server that provides structured workflows and tools for AI agents working with software development projects, with

Local serverstdio

What is the Railagent MCP server?

A Model Context Protocol (MCP) server that provides structured workflows and tools for AI agents working with software development projects, with specialized focus on Rails applications. The railagent mcp server wraps that behind the Model Context Protocol, so an assistant can use it through 7 defined tools rather than through you.

Adding it to your client

Installation goes through your MCP client rather than a global install: point it at cestbalez/railagent on a container image and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.

Its toolset

Everything the assistant can do here goes through one of these:

  • build_functional_requirements — Collects comprehensive project requirements
  • build_prd — Generates Product Requirements Documents from functional requirements
  • build_frd — Creates Feature Requirements Documents for specific features
  • build_tdd — Breaks down features into detailed implementation plans with commit-level subtasks
  • build_architecture — Generates comprehensive architecture documentation
  • initialize_task — Sets up implementation subtasks from TDD plans
  • execute_task — Executes individual tasks with review checkpoints

Caveats

  • 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.
  • MCP clients confirm each tool call by default. Leave that on until you have watched what the railagent mcp server does with a few real requests.

When to reach for it

Plenty of knowledge and memory servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Railagent's toolset — build_functional_requirements, build_prd, build_frd and 4 more — is a fair guide to whether it matches your workflow. It is maintained by railwave-labs; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Available tools

ToolWhat it does
build_functional_requirementsCollects comprehensive project requirements
build_prdGenerates Product Requirements Documents from functional requirements
build_frdCreates Feature Requirements Documents for specific features
build_tddBreaks down features into detailed implementation plans with commit-level subtasks
build_architectureGenerates comprehensive architecture documentation
initialize_taskSets up implementation subtasks from TDD plans
execute_taskExecutes individual tasks with review checkpoints

How to install the Railagent MCP server

{
  "mcpServers": {
    "Railagent": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "cestbalez/railagent:latest"
      ]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Example prompts to try

  • Use Railagent to build functional requirements.
  • Use Railagent to build prd.
  • Use Railagent to build frd.

Frequently asked questions

It connects Railagent to MCP-compatible AI assistants such as Claude and Cursor, exposing 7 tools (build_functional_requirements, build_prd, build_frd, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Railagent directly.