io.github.jaredco-ai/weather-mcp-server

🌦 WeatherTrax MCP Server

Fast, reliable weather data for Claude and other MCP clients.
Get current conditions and multi-day forecasts for any location worldwide.

🌐 Remote MCP Server (no install required)
https://mcp-weathertrax.jaredco.com/mcp

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⚡ 10-Second Demo

Ask Claude:

“What’s the weather in Miami tomorrow?”

Claude will call the MCP weather server and return a forecast instantly.

Example API call:

curl -X POST https://mcp-weathertrax.jaredco.com/tools/weatherTool \
  -H "Content-Type: application/json" \
  -d '{"location":"Miami","query_type":"current"}'

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🚀 Features

• Real-time Weather Data – Current conditions, temperature, humidity, wind speed
• Multi-day Forecasts – Up to 14-day forecasts
• Planning Tool – 7-day forecasts optimized for events or construction
• Flexible Locations – City names, ZIP codes, or coordinates
• Token-Efficient – Compact responses optimized for LLM usage
• Production-Ready – Rate limiting and monitoring
• Public API – No API keys required
• MCP Compliant – Full JSON-RPC 2.0 support

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⚡ Quick Start

Claude

In Claude or Claude Desktop, open Settings → Connectors → Add connector and use:

Name: WeatherTrax
URL:  https://mcp-weathertrax.jaredco.com/mcp

You can now ask:

What’s the weather in New York this weekend?

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🌐 Direct API Usage

Health Check

curl https://mcp-weathertrax.jaredco.com/healthz

MCP Manifest

curl https://mcp-weathertrax.jaredco.com/.well-known/mcp/manifest

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💡 Usage Examples

Current Weather

curl -X POST https://mcp-weathertrax.jaredco.com/tools/weatherTool \
  -H "Content-Type: application/json" \
  -d '{
    "location": "San Francisco, CA",
    "query_type": "current"
  }'

Example response:

{
  "summary": "It is currently 54°F and Clear in San Francisco.",
  "temp_high": 54,
  "temp_low": 54,
  "condition": "Clear",
  "wind": "5 mph W",
  "humidity": 65
}

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Multi-Day Forecast

curl -X POST https://mcp-weathertrax.jaredco.com/tools/weatherTool \
  -H "Content-Type: application/json" \
  -d '{
    "location": "New York",
    "query_type": "multi_day",
    "num_days": 3
  }'

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🛠 Available Tools

weatherTool

Retrieve current weather or forecasts.

Input:

{
  "location": "city name or coordinates",
  "query_type": "current | multi_day",
  "num_days": "optional forecast length"
}

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weatherPlanningTool

7-day planning forecast for outdoor work or events.

Input:

{
  "location": "city or place",
  "context": "construction | travel | event",
  "timeframe": "optional timeframe hint"
}

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🔗 MCP Protocol Integration

This server supports the full MCP JSON-RPC protocol.

Example tool call:

curl -X POST https://mcp-weathertrax.jaredco.com/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{
    "jsonrpc":"2.0",
    "id":1,
    "method":"tools/call",
    "params":{
      "name":"weatherTool",
      "arguments":{
        "location":"London",
        "query_type":"current"
      }
    }
  }'

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🧪 Testing

Run locally in one terminal:

npm install
npm start

In another terminal, run the protocol tests:

npm test

Release smoke suite:

npm run test:full

npm run test:full currently runs the same supported end-to-end smoke suite. The old pre-Streamable-HTTP regression harness remains available as npm run test:legacy; it is retained for reference and is not a release gate.

Deployment configuration

Set these server-side environment variables; never commit them:

Variable	Required	Purpose
WEATHER_API_KEY	Yes	World Weather Online API key.
PORT	No	HTTP listener port; defaults to 3000.
TRUST_PROXY	Production-dependent	Number of trusted reverse-proxy hops; set to 1 for a single known proxy.
ALLOWED_ORIGINS	No	Comma-separated browser origins allowed to call MCP; defaults to https://claude.ai.

The service exposes aggregate, non-identifying operational counters at /metrics. Do not place this endpoint behind a public dashboard without adding appropriate access control.

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🔒 Privacy

Privacy policy available at:

https://mcp-weathertrax.jaredco.com/privacy

Key points:

• Aggregate operational metrics only; locations and raw provider responses are not logged
• Short-lived in-memory caching reduces duplicate provider requests
• No cookies or tracking
• HTTPS enforced

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🛠 Development

Clone the repo:

git clone https://github.com/jaredco/weather-mcp-server.git
cd weather-mcp-server
npm install
npm start

Server runs locally at:

http://localhost:3000

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📦 Technology Stack

• Node.js
• Express 5
• @modelcontextprotocol/sdk
• World Weather Online API
• Railway hosting

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📄 License

MIT License.

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🌟 Acknowledgments

Built using the Model Context Protocol by Anthropic.

Weather data provided by World Weather Online.

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📊 Status

Server: Production
API Version: 1.0.1
MCP Protocol: 2025-03-26

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Made with ☀️ for Claude and MCP