MCP Demo App

A simple Node.js/Express API server using TypeScript for managing products and orders, with Model Context Protocol (MCP) integration.

Features

- RESTful API for products and orders - Bearer token authentication - Data stored in JSON files - MCP server exposing tools for product/order queries - TypeScript for type safety

Project Structure

├── src/
│   ├── server.ts         # Main Express API server
│   ├── mcpServer.ts      # MCP server exposing tools
│   └── data/
│       ├── products.json # Product data
│       └── orders.json   # Order data
├── dist/                 # Compiled JS output
├── package.json          # Project metadata and scripts
├── tsconfig.json         # TypeScript config
└── .gitignore            # Ignored files

Getting Started

Prerequisites

- Node.js (v16+ recommended) - npm

Install Dependencies

npm install

Build the Project

npm run build

Run the API Server

npm run dev   # For development (with nodemon)
npm start     # For production (after build)

Run the MCP Server

npm run mcp

Authentication

All API endpoints (except /health) require a Bearer token. Example valid tokens: - valid_token_123 - client_abc_token

Include the token in the Authorization header:

Authorization: Bearer valid_token_123

API Endpoints

Health Check

- GET /health — Returns { status: 'ok' }

Products

- GET /products — List all products - GET /products/:productId — Get product by ID

Orders

- GET /orders — List all orders (optionally filter by customerId) - GET /orders/:orderId — Get order by ID

MCP Server Tools

The MCP server (src/mcpServer.ts) exposes the following tools: - getProductInfo(productId) — Get product details and related orders - listProducts() — List all products - getProductOrders(productId) — Get all orders for a product - searchProducts(query) — Search products by name or category

Example Data

Products (src/data/products.json)

[
  { "id": "p1", "name": "Cloud Widget", "category": "Widgets", "price": 99.99 },
  { "id": "p2", "name": "Data Analyzer", "category": "Analytics", "price": 199.99 },
  { "id": "p3", "name": "API Gateway", "category": "Infrastructure", "price": 149.99 }
]

Orders (src/data/orders.json)

[
  { "id": "o101", "productId": "p1", "customerId": "cust_abc", "quantity": 2, "orderDate": "2023-10-26T10:00:00Z", "status": "shipped" },
  { "id": "o102", "productId": "p2", "customerId": "cust_xyz", "quantity": 1, "orderDate": "2023-10-27T15:30:00Z", "status": "processing" },
  { "id": "o103", "productId": "p3", "customerId": "cust_abc", "quantity": 3, "orderDate": "2023-10-28T09:15:00Z", "status": "delivered" }
]

Development Notes

- TypeScript config: see tsconfig.json - Ignored files: dist/, node_modules/ - Data is persisted in JSON files in src/data/

License

MIT