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Aviation Weather MCP Server

Aviation Weather MCP Server

Public
finack/aviation-mcp

Provides aviation weather data via Model Context Protocol, including METARs, TAFs, PIREPs, and route forecasts, with a type-safe API client for accurate flight planning support.

typescript
0 tools
May 30, 2025
Updated Jun 4, 2025

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Aviation Weather MCP Server

This is a Model Context Protocol (MCP) server that provides aviation weather information for flight planning. It connects to the Aviation Weather API to fetch METARs, TAFs, PIREPs, and other data.

DISCLAIMER

DO NOT USE THIS TOOL FOR FLIGHT PLANNING OR IN-FLIGHT DECISION MAKING.

IMPORTANT DISCLAIMER: This Aviation Weather MCP server provides weather data sourced from aviationweather.gov for informational purposes only. The information provided by this tool should NEVER be used as the sole source for flight planning or in-flight decision making.

Weather data may be incomplete, delayed, or inaccurate. Additionally, the large language model interpreting this data may misunderstand or incorrectly represent critical information. Always consult official aviation weather sources and obtain a proper weather briefing from authorized providers before any flight.

This tool is not FAA-approved, is not a replacement for certified weather services, and should be used only as a supplementary reference. The developers assume no liability for decisions made based on information provided by this tool.

ALWAYS verify critical weather information through official channels.

Features

  • Type-safe API client automatically generated from the official Aviation Weather API Swagger definition
  • MCP tools for weather data:
    • get-metar: Get current weather observations
    • get-taf: Get terminal aerodrome forecasts
    • get-pireps: Get pilot reports near an airport
    • get-route-weather: Get comprehensive weather for a route between two airports

Setup

Prerequisites

  • Node.js 18 or higher
  • npm or yarn
  • curl (for fetching the Swagger YAML)

Installation

  1. Clone this repository:

    git clone https://github.com/yourusername/aviation-weather-mcp-server.git cd aviation-weather-mcp-server
  2. Install dependencies:

    npm install
  3. Build the server (this will fetch the latest Swagger definition, generate the API client, and compile the TypeScript):

    npm run build
  4. Start the server:

    npm start

Using with Claude for Desktop

To use this server with Claude for Desktop:

  1. Edit your Claude for Desktop configuration file:

    • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
    • Windows: %APPDATA%\Claude\claude_desktop_config.json
  2. Add the server to the configuration:

    { "mcpServers": { "aviation-weather": { "command": "node", "args": [ "/absolute/path/to/aviation-weather-mcp-server/build/index.js" ] } } }
  3. Restart Claude for Desktop

Example Queries

Once connected to Claude, you can ask questions like:

  • "What's the current weather at KJFK?"
  • "Is there a TAF available for KORD?"
  • "I'm planning to fly from KBOS to KPHL tomorrow. What's the weather looking like?"
  • "Are there any PIREPs near KDEN?"

Development

Project Structure

  • src/index.ts: Main server code
  • packages/aviation-weath-api: Autogenerate API client for Aviation Weather .gov

Building the aviation weather client

The build process follows these steps:

  1. npm run aviation-weather-api:clean: delete the existing client
  2. npm run aviation-weather-api:fetch: Fetches the latest Swagger definition from aviationweather.gov
  3. npm run aviation-weather-api:generate: Generates a typed TypeScript client from the Swagger definition

Building and running the app

  1. npm run build: Build the javascript client
  2. npm run start: Run the MCP server

Adding More Tools

To add new tools to the server, follow this pattern:

server.tool( "tool-name", { // Zod schema for parameters param1: z.string().describe("Parameter description"), param2: z.number().optional().describe("Optional parameter") }, async ({ param1, param2 }) => { try { // Implementation return { content: [{ type: "text", text: "Response text" }] }; } catch (error) { return { content: [{ type: "text", text: `Error: ${error.message}` }], isError: true }; } } );

How It Works

  1. The server fetches the latest Swagger definition from aviationweather.gov
  2. The OpenAPI Generator creates a type-safe client from this definition
  3. The server uses this client to make API calls with proper typing
  4. Error handling and response formatting ensure a smooth experience

License

MIT

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