MCP Weather Alerts Tool using FastMCP + Claude Desktop

@nahilahmed

Basic information

About MCP Weather Alerts Tool using FastMCP + Claude Desktop

A Python MCP (Model Context Protocol) server that fetches real-time weather alerts by U.S. state using api.weather.gov, built with FastMCP and integrated into Claude Desktop.

#mcp #weather-alerts #fastmcp #claude-desktop

MCP Weather Alerts Tool using FastMCP + Claude Desktop config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mcp-weather-alert-tool": {
      "command": "uv",
      "args": [
        "init",
        "mcpcrashcourse",
        "#",
        "start",
        "new",
        "project"
      ]
    }
  }
}

MCP Weather Alerts Tool using FastMCP + Claude Desktop tools

Tool list not available yet

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We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is MCP Weather Alerts Tool using FastMCP + Claude Desktop?

This project implements a custom MCP (Model Context Protocol) server using the FastMCP Python SDK, integrating with Claude Desktop to enable an AI assistant to retrieve real-time weather alerts for any U.S. state via the api.weather.gov API.

How to use MCP Weather Alerts Tool using FastMCP + Claude Desktop?

Install dependencies using uv add "mcp[cli]" httpx and place the weather.py tool in a server/ folder. Launch interactively with uv run mcp dev server/weather.py and test via MCP Inspector at http://localhost:6757. For Claude Desktop, add a weather entry to claude_desktop_config.json pointing to uv run mcp run <path>/server/weather.py, restart the app, and ask for alerts by state (e.g., “What are the weather alerts for Texas?”).

Key features of MCP Weather Alerts Tool using FastMCP + Claude Desktop

Implements a custom MCP server with FastMCP Python SDK
Uses httpx to call real-time weather alerts from api.weather.gov
Returns structured information: event, severity, description, and instructions
Integrates directly with Claude Desktop as an MCP tool
Testable interactively via MCP Inspector

Use cases of MCP Weather Alerts Tool using FastMCP + Claude Desktop

Ask Claude Desktop to retrieve active weather alerts for any U.S. state
Integrate live alert data into AI-powered workflows or assistants
Prototype and debug MCP tools using the built-in MCP Inspector UI

Frequently asked questions

What runtime and dependencies are required?

Python 3.x with `uv` package manager, plus `mcp[cli]` and `httpx`. The project uses `uv.lock` for dependency locking.

How can I test the tool without Claude Desktop?

Run `uv run mcp dev server/weather.py` to launch the MCP Inspector at `http://localhost:6757`, where you can call `get_alerts` with a state code.

Where does the weather alert data come from?

All data is fetched live from the official [api.weather.gov](https://www.weather.gov/documentation/services-web-api) endpoint `/alerts/active`, which is free and does not require an API key.

How do I integrate this tool with Claude Desktop?

Add a server entry to `claude_desktop_config.json` with the `uv run mcp run` command pointing to your `weather.py` file. Restart Claude Desktop, then ask a weather-related question.

What are the core MCP primitives used?

The server implements a **Tool** (`get_alerts`), which is analogous to a POST endpoint. MCP also defines Resources (static data) and Prompts (reusable LLM templates), but this project focuses on a single tool.

Comments

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