mcp weather

A Model Context Protocol (MCP) server that provides hourly weather forecasts using the AccuWeather API.

Quick Start

You need an AccuWeather API key (free tier available).
Sign up here and create an app to get your key.

Export your API key as an environment variable:

export ACCUWEATHER_API_KEY=your_api_key_here

Then run the MCP Weather server directly with:

npx -y @timlukahorstmann/mcp-weather

Or, for HTTP/REST access via supergateway:

npx -y supergateway --stdio "npx -y @timlukahorstmann/mcp-weather" 
  --port 4004 
  --baseUrl http://127.0.0.1:4004 
  --ssePath /messages 
  --messagePath /message 
  --cors "*" 
  --env ACCUWEATHER_API_KEY="$ACCUWEATHER_API_KEY"

MCP Server Config Example

For integration with Claude Desktop or other MCP-compatible clients, add this to your config (e.g. claude_desktop_config.json):

{
  "mcpServers": {
    "weather": {
      "command": "npx",
      "args": ["-y", "@timlukahorstmann/mcp-weather"],
      "env": {
        "ACCUWEATHER_API_KEY": "your_api_key_here"
      }
    }
  }
}

Overview

This MCP server allows large language models (like Claude) to access real-time weather data. When integrated with an LLM, it enables the model to:

• Fetch accurate, up-to-date weather forecasts
• Provide hourly weather data for any location
• Access temperature, conditions, and other weather details

Prerequisites

• Node.js ≥18
• An AccuWeather API key (set via .env or your shell)

Setup

1. Clone this repository:

   git clone https://github.com/TimLukaHorstmann/mcp-weather.git
   cd mcp-weather

2. Install dependencies:

   npm install

3. Get an AccuWeather API key:

4. Register at AccuWeather API

5. Create a new app and obtain an API key

6. Create a .env file with your API key:

   ACCUWEATHER_API_KEY=your_api_key_here

7. Build the project:

   npm run build

Usage with Claude Desktop

1. Configure Claude Desktop to use this MCP server:
2. Open Claude Desktop
3. Go to Settings > Developer > Edit Config
4. Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "weather": {
      "command": "npx",
      "args": ["-y", "@timlukahorstmann/mcp-weather"],
      "env": {
        "ACCUWEATHER_API_KEY": "your_api_key_here"
      }
    }
  }
}

1. Restart Claude Desktop

2. In a new conversation, enable the MCP server by clicking the plug icon and selecting "weather"

3. Now you can ask Claude for weather forecasts, such as:

4. "What s the weather forecast for New York City?"
5. "Will it rain in London tomorrow?"
6. "How hot will it be in Tokyo this afternoon?"

Development

• Install dev dependencies: npm install
• Lint your code: npm run lint
• Build: npm run build
• Run tests: npm test
• Start in dev mode: npm run dev

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.