Real-time Weather Forecasts with GPT-4o-mini and MCP Weather Tool

🌦️ What It Does

This workflow uses the n8n Agent node to call a live hosted Model Context Protocol (MCP) server that returns real-time weather forecasts.

• Supports current or 5-day forecasts
• Hosted MCP tool — no API key needed for weather data
• Based on OpenWeatherMap
• Workflow is fully preconfigured and ready to run

⚙️ How It Works

1. The Agent node sends a tool call to the MCP weather tool
2. The server replies with a short forecast
3. Output is returned to n8n and can be used however you like

🧪 Setup Steps

1. Clone or download the GitHub repo:

Github: weathertrax-mcp-agent-demo

1. Open the file: n8n-weather-agent.json

2. In n8n:

   • Go to Import Workflow → Paste JSON
   • Paste the contents of n8n-weather-agent.json

3. ✅ The Agent node is already configured:

   • The system prompt is included
   • The tool endpoint is pre-set

4. All you need to do is:

   • Add your OpenAI API key to the existing OpenAI Account credential
   • OR switch to another model provider

Then hit run and you're done ✅

🔗 Full project link:

Github: weathertrax-mcp-agent-demo GitHub repo