How to Use the n8n HTTP Request Node for API Integration

steps

1. Remove the OpenWeatherMap Node:

   • Disable the existing OpenWeatherMap node by clicking the "Disable" button.
   • Unlink the node by removing input/output connections, then delete it from the workflow.

2. Review OpenWeatherMap API Documentation:

   • Visit the OpenWeatherMap API documentation and locate the endpoint that retrieves weather data by city name. Here's an example URL format:
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     https://api.openweathermap.org/data/2.5/weather?q={CITY_NAME}&appid={API_KEY}&units={UNIT}

   • Note that the API requires query parameters for q (city name), appid (API key), and optionally units (e.g., metric for Celsius).

3. Add the HTTP Request Node:

   • Click the “+” button in the n8n workflow editor and search for the HTTP Request node.
   • Add it to your workflow where the OpenWeatherMap node was previously connected.

4. Configure the HTTP Request Node:

   • Set the HTTP Method to GET (the method required by the OpenWeatherMap API).
   • In the URL field, enter the base URL:
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     https://api.openweathermap.org/data/2.5/weather

   • Enable the Send Query Parameters option.

5. Add Query Parameters:

   • Click "Add Parameter" and provide the following keys and example values (replace with your actual API key):
     • Name: q, Value: Toronto
     • Name: appid, Value: YourOpenWeatherMapAPIKey
     • Name: units, Value: metric

6. Test the Setup:

   • Click the “Execute Node” button to send a test request.
   • Verify the response in the node's output. You should see JSON data containing weather details for the specified city.

7. Dynamic City Input via Webhook:

   • Add a Webhook node before the HTTP Request node to accept city inputs dynamically.
   • Reconnect the Webhook node to the HTTP Request node and update the q parameter to reference the Webhook's input field (e.g., "city").

8. Finalize and Test Workflow:

   • Save and test the workflow by triggering the Webhook with different city names (e.g., ?city=Rome).
   • Validate that the HTTP Request responds accurately with weather data for the specified city.