AffirmerAu/MCP_Server

CPR MCP Server

This project provides a beginner-friendly Model Context Protocol (MCP) server implemented in TypeScript. The server exposes CPR (Cardiopulmonary Resuscitation) training resources — a structured lesson, a demonstration video link, and a reflective question — so that AI assistants and applications can pull trusted content on demand.

The server is transport-agnostic JSON-RPC over HTTP, making it easy to run locally or deploy to Render for wider access.

Features

• ✅ Structured CPR lesson covering danger checks, response, airway, breathing, compressions, and AED usage.
• 🎬 Demonstration video reference with guidance on what to watch for.
• ❓ Reflective check question so each interaction ends by confirming understanding.
• 📦 MCP-style JSON-RPC interface with initialize, resources/*, and prompts/* methods.
• 🌐 Built-in REST helpers (/resources, /prompts) for quick manual testing.
• ☁️ Render-ready with zero external dependencies.

Prerequisites

• Node.js 18 or newer (comes with npm).
• Git (for cloning the repository).

1. Clone the project

git clone <your-fork-or-repo-url>
cd MCP_Server

If you are starting from this template on a fresh machine, replace <your-fork-or-repo-url> with the repository address where you store your copy.

2. Install dependencies

The project only relies on TypeScript tooling, so installation is quick:

npm install

Tip: If you are working behind a proxy, configure npm config set proxy http://... before running the command.

3. Run the MCP server locally

Development mode (TypeScript directly)

npm run dev

This command uses ts-node-dev so the server restarts automatically when you edit files. You will see a console message similar to:

CPR MCP server listening on port 3000

Production build

npm run build
npm start

npm run build emits compiled JavaScript into dist/, and npm start runs the compiled code with Node.js.

By default the server listens on port 3000. Override this by exporting PORT before running the server:

PORT=8080 npm start

4. Explore the API

The server speaks JSON-RPC 2.0 at /mcp and also exposes helper endpoints for humans.

4.1 Quick health check

curl http://localhost:3000/

Response:

{
  "message": "CPR MCP Server is running.",
  "endpoints": {
    "rpc": "/mcp",
    "resources": "/resources",
    "prompts": "/prompts"
  }
}

4.2 List MCP resources

curl http://localhost:3000/resources

4.3 Fetch the lesson via JSON-RPC

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "resources/read",
    "params": {
      "uri": "cpr://lesson"
    }
  }'

4.4 Get the question prompt

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "prompts/get",
    "params": {
      "name": "cpr-quick-start"
    }
  }'

5. Deploy to Render

Render can host this server as a free web service.

1. Commit your changes and push them to a GitHub/GitLab repository.
2. Create a new Web Service on Render and connect your repository.
3. Choose the Node environment.
4. Set the Build Command to:

   npm install && npm run build
   

5. Set the Start Command to:

   npm start
   

6. Keep the default PORT environment variable that Render injects.
7. (Optional) Add a health check hitting / to ensure the service is ready.

When Render finishes deployment you will receive a public URL like https://cpr-mcp.onrender.com. Test it with the same curl commands, swapping localhost:3000 for your Render domain.

6. Customising the content

• Edit src/content/cprLesson.ts to update the lesson copy, link to a different video, or change the reflective question.
• Add more entries to RESOURCES in src/resources.ts to expose additional articles, downloads, or checklists.
• Create new entries in PROMPTS for other pre-composed tutor responses your MCP client can reuse.

After making changes, rebuild (npm run build) and redeploy.

7. Next steps

• Connect the MCP server to an MCP-compatible client (for example, a local AI assistant) by pointing it to the /mcp endpoint.
• Expand the protocol support with additional methods such as tools/list or tools/call if your client expects them.
• Add automated tests for JSON-RPC handlers to keep the CPR content verified.

Happy learning, and remember: ensure the area is safe before you begin CPR!