Node.js MCP Weather Server with Azure Deployment

A Model Context Protocol (MCP) server built with Express.js and Node.js that provides weather information using the National Weather Service API. Ready for deployment to Azure App Service with Azure Developer CLI (azd).

🌟 Features

• Express.js Framework: Fast, unopinionated web framework for Node.js
• MCP Protocol Compliance: Full support for JSON-RPC 2.0 MCP protocol
• HTTP Transport: HTTP-based communication for web connectivity
• Weather Tools:
  • get_alerts: Get weather alerts for any US state
  • get_forecast: Get detailed weather forecast for any location
• Azure Ready: Pre-configured for Azure App Service deployment
• Web Test Interface: Built-in HTML interface for testing
• National Weather Service API: Real-time weather data from official US government source

💻 Local Development

Prerequisites

• Node.js 22+ (or Node.js 18+)
• npm (Node Package Manager)

Setup & Run

1. Clone and install dependencies:

   git clone <your-repo-url>
   cd remote-mcp-webapp-node
   npm install
   

2. Start the development server:

   npm run dev
   

3. Access the server:

   • Server: http://localhost:8000
   • Health Check: http://localhost:8000/health
   • Test Interface: http://localhost:8000/test

🔌 Connect to the Local MCP Server

Using VS Code - Copilot Agent Mode

1. Add MCP Server from command palette and add the URL to your running server's HTTP endpoint:

   http://localhost:8000
   

2. List MCP Servers from command palette and start the server
3. In Copilot chat agent mode, enter a prompt to trigger the tool:

   What's the weather forecast for San Francisco?
   

4. When prompted to run the tool, consent by clicking Continue

Using MCP Inspector

1. In a new terminal window, install and run MCP Inspector:

   npx @modelcontextprotocol/inspector
   

2. CTRL+click the URL displayed by the app (e.g. http://localhost:5173/#resources)
3. Set the transport type to HTTP
4. Set the URL to your running server's HTTP endpoint and Connect:

   http://localhost:8000
   

5. List Tools, click on a tool, and Run Tool

🚀 Quick Deploy to Azure

Prerequisites

• Azure CLI
• Azure Developer CLI (azd)
• Active Azure subscription

Deploy in 3 Commands

# 1. Login to Azure
azd auth login

# 2. Initialize the project
azd init

# 3. Deploy to Azure
azd up

After deployment, your MCP server will be available at:

• Health Check: https://<your-app>.azurewebsites.net/health
• MCP Capabilities: https://<your-app>.azurewebsites.net/mcp/capabilities
• Test Interface: https://<your-app>.azurewebsites.net/test

🔌 Connect to the Remote MCP Server

Follow the same guidance as above, but use your App Service URL instead.

🧪 Testing

Visit /test endpoint for an interactive testing interface.

🌦️ Data Source

This server uses the National Weather Service (NWS) API:

• Real-time weather alerts and warnings
• Detailed weather forecasts
• Official US government weather data
• No API key required
• High reliability and accuracy