MetService CAP MCP Server

An edge-compatible Model Context Protocol (MCP) server built with Hono, mcp-handler, TypeScript, and Zod. It fetches the public MetService CAP Atom feed at https://alerts.metservice.com/cap/atom, parses it with fast-xml-parser, and exposes the current alerts as MCP tools.

This project follows the structure of Vercel's examples/starter/hono-mcp template and is configured for Vercel Edge deployment.

MCP endpoint

• POST /mcp - Streamable HTTP MCP endpoint.

• GET / - Basic server discovery response.

Related MCP server: Weather Server

Tools

get_active_road_warnings

Fetches the live MetService CAP Atom feed and returns active warnings targeting SH1 Desert Road. If none are active, the tool returns a clear status.

get_all_alerts

Fetches the live MetService CAP Atom feed and returns all active alert entries with normalized Atom/CAP fields and the raw parsed entry.

Development

npm install
npm run typecheck
npm run dev

Point MCP clients at:

http://localhost:3000/mcp

Deploy

npm install
npm run build
vercel deploy --prod

vercel.json configures the Hono entrypoint for Vercel Edge runtime.