Summary
Connects Claude and other MCP clients to World Weather Online's API with eight exposed tools covering current conditions, 14-day forecasts, historical data back to 2008, marine reports with swell and tides, ski resort conditions at different elevations, astronomy data, timezone lookups, and 12-year climate averages. Deployed as a streamable HTTP server, so you pass your WWO API key as a query parameter in the URL. Reach for this when you need comprehensive weather data beyond basic forecasts, especially for marine conditions, ski planning, or historical analysis. The search_location tool handles autocomplete, and all the geographic endpoints work worldwide.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
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Get the MCP →World Weather Online — MCP Server (Railway)
MCP server for World Weather Online. Lets AI assistants like Claude, Cursor, and others call WWO weather data directly as tools.
Deploy to Railway
Step 1 — Push to GitHub
- Create a new repository on github.com (call it
wwo-mcp-server) - Open Terminal in this folder and run:
git init
git add .
git commit -m "Initial commit"
git remote add origin https://github.com/YOUR_USERNAME/wwo-mcp-server.git
git push -u origin main
Step 2 — Deploy on Railway
- Go to https://railway.app and sign up / log in with GitHub
- Click New Project → Deploy from GitHub repo
- Select your
wwo-mcp-serverrepository - Railway detects Node.js automatically and deploys
Your server will be live at a URL like:
https://wwo-mcp-server-production.up.railway.app
Step 3 — Add Custom Domain
-
In Railway dashboard → your project → Settings → Networking → Custom Domain
-
Type
mcp.worldweatheronline.comand click Add -
Railway shows you a CNAME value like:
wwo-mcp-server-production.up.railway.app -
Go to your DNS provider and add:
Type Name Value CNAME mcp wwo-mcp-server-production.up.railway.app -
SSL certificate is provisioned automatically within minutes
Step 4 — Test
Visit your health endpoint:
https://mcp.worldweatheronline.com/health
Test in MCP Inspector:
https://mcp.worldweatheronline.com/mcp?key=YOUR_WWO_API_KEY
Connecting AI Clients
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"world-weather-online": {
"url": "https://mcp.worldweatheronline.com/mcp?key=YOUR_API_KEY"
}
}
}
Cursor / Windsurf
Add to .cursor/mcp.json:
{
"mcpServers": {
"world-weather-online": {
"url": "https://mcp.worldweatheronline.com/mcp?key=YOUR_API_KEY"
}
}
}
Available Tools
| Tool | Description |
|---|---|
get_weather | Current conditions + 14-day forecast |
get_historical_weather | Past weather from 2008 onwards |
get_marine_weather | Swell, tides, water temperature |
get_ski_weather | Top/mid/base elevation forecasts |
search_location | Location autocomplete |
get_astronomy | Sunrise, sunset, moon phase |
get_timezone | Local time + UTC offset |
get_climate_averages | Monthly 12-year climate averages |
Local Development
npm install
npm run dev
Server runs at http://localhost:3000
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →
