Weather MCP Server

Weather MCP Server

A Model Context Protocol (MCP) server that provides weather information and alerts using the National Weather Service (NWS) API.

Features

• Get weather alerts for any US state
• Get detailed weather forecasts for any location using latitude and longitude
• Easy-to-use MCP interface
• Docker support for easy deployment

Prerequisites

• Python 3.13 or higher
• Docker and Docker Compose (for containerized deployment)

Installation

Local Development

1. Clone the repository
2. Install dependencies using uv:

   pip install uv
   uv venv
   uv pip install .
   uv run src/main.py
   

Docker Deployment

Simply use Docker Compose to build and run the server:

docker compose up -d

The server endpoint will be available at http://localhost:8001/sse.

Available Tools

get_alerts(state: str)

Get active weather alerts for a US state.

Parameters:

• state: Two-letter US state code (e.g., "CA" for California, "NY" for New York)

get_forecast(latitude: float, longitude: float)

Get detailed weather forecast for a specific location.

Parameters:

• latitude: Latitude of the location
• longitude: Longitude of the location

Development

The project uses Docker volumes for development, allowing code changes to be reflected without rebuilding the container. The source code is mounted at /app/src in the container.

Technical Details

• Built with Python's MCP framework
• Uses httpx for async HTTP requests
• Implements proper error handling and request timeouts
• Uses uv for dependency management
• Containerized with Docker for easy deployment

Environment Variables

• PYTHONUNBUFFERED=1: Ensures Python output is sent directly to the terminal without buffering

Port

The server runs on port 8000 inside the container and is mapped to port 8001 on the host machine.