MCP Weather SSE Server

A Model Context Protocol (MCP) server that connects to the OpenWeatherMap API through Server-Sent Events (SSE). This server provides real-time weather data to AI clients like Claude, CursorAI, or MCP-Inspector.

Features

• Implements the Model Context Protocol for seamless integration with AI tools
• Uses Server-Sent Events (SSE) transport for real-time communication
• Connects to the OpenWeatherMap API to fetch live weather data
• Provides three tools:
  • get_current_weather: Get current weather conditions for a city
  • get_weather_forecast: Get a multi-day weather forecast for a city
  • get_weather_by_coordinates: Get weather for specific geographic coordinates

Prerequisites

• Python 3.8+
• An OpenWeatherMap API key (sign up at openweathermap.org)

Installation

1. Clone this repository:

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

2. Create a virtual environment and install dependencies:

   python -m venv venv
   source venv/bin/activate  # On Windows: venv\Scripts\activate
   pip install mcp requests
   

Usage

Starting the Server

You can start the server with your OpenWeatherMap API key:

# Using command line argument
python mcp_weather_sse.py --api-key YOUR_API_KEY

# Using environment variable
export OPENWEATHER_API_KEY=YOUR_API_KEY
python mcp_weather_sse.py

# Customize host and port (default: 127.0.0.1:3001)
python mcp_weather_sse.py --host 0.0.0.0 --port 8080

Connecting with MCP Clients

Cursor AI

1. Open Cursor AI
2. Go to File → Preferences → Cursor Settings → MCP → Add New Server
3. Enter the following details:
   • Name: Weather SSE
   • Type: sse
   • URL: http://127.0.0.1:3001/sse

Claude Desktop

1. Open Claude Desktop
2. Go to Settings → MCP Servers
3. Add a new server with the following configuration:

   {
     "mcpServers": {
       "weather": {
         "type": "sse",
         "url": "http://127.0.0.1:3001/sse"
       }
     }
   }
   

MCP-Inspector

You can use the MCP-Inspector tool to test your server:

npm install -g @anthropic-ai/mcp-inspector
mcp-inspector http://127.0.0.1:3001/sse

Example Queries

Once connected, you can use the following queries to interact with the server:

1. "What's the current weather in New York?"
2. "Can you give me a 3-day forecast for Tokyo?"
3. "What's the weather at coordinates 40.7128, -74.0060?"

API Reference

get_current_weather

Get current weather conditions for a city.

Parameters:

• city (string): City name (e.g., 'London', 'New York')
• units (string, optional): Units of measurement ('metric' or 'imperial', default: 'metric')

get_weather_forecast

Get a multi-day weather forecast for a city.

Parameters:

• city (string): City name (e.g., 'London', 'New York')
• days (integer, optional): Number of days to forecast (1-5, default: 3)
• units (string, optional): Units of measurement ('metric' or 'imperial', default: 'metric')

get_weather_by_coordinates

Get weather for specific geographic coordinates.

Parameters:

• latitude (number): Latitude coordinate
• longitude (number): Longitude coordinate
• units (string, optional): Units of measurement ('metric' or 'imperial', default: 'metric')

Security Considerations

• The server binds to 127.0.0.1 by default, making it only accessible from your local machine
• For production use, implement proper authentication and HTTPS
• Consider rate limiting to avoid exceeding OpenWeatherMap API quotas

License

MIT

Acknowledgments

• Built with the Model Context Protocol
• Uses data from the OpenWeatherMap API