About
Simple Weather MCP Server Example
README
Node.js server implementing Model Context Protocol (MCP) for accessing weather information in the US.
This is an example explained in MCP Quickstart.
It has been hosted as an npm package
for convenient use with npx.
Usage with Claude Desktop
Merge the following JSON fragment into your claude_desktop_config.json.
Please refer to the "Testing your server with Claude for Desktop" section of
MCP Quickstart for details.
# MacOS/Linux
code ~/Library/Application\ Support/Claude/claude_desktop_config.json
# Windows
code $env:AppData\Claude\claude_desktop_config.json
{
"mcpServers": {
"weather": {
"command": "npx",
"args": [
"-y",
"@h1deya/mcp-server-weather"
],
}
}
}
Tools
- get-alerts
- Get weather alerts for a US state.
- Input:
state(string): Two-letter US state code (e.g. CA, NY)
- get-forecast
- Get weather forecast for a location in the US
- Inputs:
latitude(number): Latitude of the locationlongitude(number): Longitude of the location
Example Queries
- Tomorrow's weather in Palo Alto?
- Any weather alerts in California?
Original Author and License
This example is based on the code explained in MCP Quickstart (github), whose license is CC-BY-4.0. The completed code examples are also hosted in this repo, whose license is MIT (Copyright (c) 2025 Model Context Protocol). So I've chosen the MIT license for this repo.
Installing Weather Js
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/hideya/mcp-server-weather-jsFAQ
Is Weather Js MCP free?
Yes, Weather Js MCP is free — one-click install via Unyly at no cost.
Does Weather Js need an API key?
No, Weather Js runs without API keys or environment variables.
Is Weather Js hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Weather Js in Claude Desktop, Claude Code or Cursor?
Open Weather Js on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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