MCP Weather Server for Claude
An MCP server for Claude that provides real-time weather alerts and forecasts using the U.S. National Weather Service API. Built with fastmcp and httpx, it exposes two tools: get_alerts (by state) and get_forecast (by lat/lon). Uses stdio transport for Claude integration.
内容
MCP Weather Server for Claude
This project implements an MCP server using the fastmcp interface, designed to serve as a Claude tool. It connects to the U.S. National Weather Service (NWS) API to provide real-time weather alerts and forecasts.
✨ Features
- 🔔 Get Active Alerts: Retrieve current weather alerts by U.S. state.
- 🌤️ Get Forecast: Fetch detailed forecasts by latitude and longitude.
- ⚡ Asynchronous & Fast: Built with
httpxandfastmcpfor high-performance async operations.
🧠 Powered by Claude
This server is built to serve as a Claude-compatible external tool via the MCP protocol, using stdio transport.
🛠️ Code Overview
Main Components
FastMCP: Initializes the MCP server.make_nws_request(): A helper for calling the NWS API with retries and headers.get_alerts(state: str): Claude-accessible tool to get weather alerts for a given U.S. state.get_forecast(latitude: float, longitude: float): Claude-accessible tool to get the forecast for any lat/lon pair.
Example Tool Usage
await get_alerts("CA")
await get_forecast(37.7749, -122.4194)
🌐 External API
National Weather Service API: https://weather.gov/documentation/services-web-api
📄 License
MIT License. Feel free to fork, modify, and use this server as a base for your own Claude tools.
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