weather-mcp-auth

dorianlgs/weather-mcp-auth

3.1

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A simple MCP weather server using FastMCP and the National Weather Service API.

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Weather MCP Server

A simple MCP (Model Context Protocol) weather server written in Python using FastMCP and the National Weather Service API.

Features

  • Weather Alerts: Get active weather alerts for any US state
  • Weather Forecasts: Get detailed weather forecasts for specific coordinates
  • FastMCP Integration: Built with FastMCP for easy MCP tool registration
  • NWS API: Uses the official National Weather Service API

Tools

get_alerts(state: str)

Get weather alerts for a US state.

Parameters:

  • state: Two-letter US state code (e.g., "CA", "NY", "TX")

get_forecast(latitude: float, longitude: float)

Get weather forecast for specific coordinates.

Parameters:

  • latitude: Latitude coordinate
  • longitude: Longitude coordinate

Installation

This project uses uv for dependency management.

  1. Install dependencies: 
    uv sync

Usage

Run the MCP server:

uv run weather.py

The server will start and listen for MCP connections.

Requirements

  • Python 3.10+
  • uv package manager

Dependencies

  • httpx>=0.28.1 - HTTP client for API requests
  • mcp[cli]>=1.2.0 - Model Context Protocol implementation

API

This server uses the National Weather Service API which provides free access to weather data for the United States.