Action MCP Example

@seuros

代码仓库

基本信息

分类

开发工具

传输方式

stdio

作者

seuros

关于 Action MCP Example

A minimal Rails API template for creating MCP (Model Context Protocol) servers with robust tool execution capabilities and examples.

#agents#rails-api#claude #mcp-server

Action MCP Example 配置

使用下面的配置,将此服务器添加到你的 MCP 客户端。

{
  "mcpServers": {
    "mcp_rails_template": {
      "command": "npx",
      "args": [
        "@modelcontextprotocol/inspector",
        "--url",
        "http://localhost:8080/mcp"
      ]
    }
  }
}

Action MCP Example 工具

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点击上方按钮,在临时沙箱中运行此服务器并实时获取工具列表。

概览

What is Action MCP Example 🚀?

A simple Ruby on Rails application demonstrating how to integrate and use the ActionMCP gem. It is intended for developers who want to see how to define MCP components (prompts, resource templates, tools) within a Rails project.

How to use Action MCP Example 🚀?

Clone the repository, run bin/setup, copy .env.example to .env and fill in required values (e.g., API keys). Set up PostgreSQL (e.g., via make up for Docker on port 5466), then start the Rails server with bin/rails s. The ActionMCP server runs on port 62770, proxied by Nginx at /mcp. You can test interactively using the MCP Inspector: npx @modelcontextprotocol/inspector --url http://localhost:8080/mcp.

Key features of Action MCP Example 🚀

JWT‑based authentication with predefined test users
Adventure story prompt generator
Gemfile dependency resource template (JSON over gemfile://{environment})
Weather forecast tool via Open‑Meteo API
RuboCop style analysis tool for Ruby snippets
Dependency info tool (production, test, runtime)
Ruby code static analysis tool (classes, modules, methods)

Use cases of Action MCP Example 🚀

Generate a short narrative adventure story from a hero name and genre
Fetch weather data for given latitude/longitude coordinates
Analyze a Ruby code snippet for style offenses using RuboCop
Retrieve project dependencies (Gemfile) as structured JSON
Index and query Ruby source files for classes, modules, and methods

常见问题

What are the runtime requirements?

Ruby (see `.ruby-version`) and PostgreSQL (or Docker for a temporary instance). The ActionMCP gem is sourced from [https://github.com/seuros/mcp](https://github.com/seuros/mcp).

How does authentication work?

JWT tokens are used. Test users (e.g., `test@example.com` / `password123`) are loaded from fixtures. Tokens can be generated in the Rails console. A pre‑configured `.mcp.json` file with a long‑lived token is provided.

Where does the MCP server run?

The ActionMCP server runs as a standalone server on port `62770` (via `mcp.ru`). Nginx proxies `/mcp` requests to this server.

What MCP components are included?

**Prompts**: `epic_adventure_prompt.rb`. **Resource Templates**: `gemfile_template.rb`. **Tools**: `dependency_info_tool.rb`, `fetch_weather_by_location_tool.rb`, `rubocop_tool.rb`, `ruby_code_analyzer_tool.rb`.

How can I test the MCP server interactively?

Use the MCP Inspector: `npx @modelcontextprotocol/inspector --url http://localhost:8080/mcp`. Make sure Docker is running (`docker compose up`) before executing the inspector command.

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