4. Testing Webhooks & External APIs

Mock external services for reliable testing.

14m Lesson 4 of 4

Testing workflows that depend on external services requires techniques to simulate incoming data and mock API responses.

Tools & Techniques

- webhook.site: Free service to inspect webhook payloads
- Postman/curl: Send test payloads to your webhook URL
- Request Bin: Capture and inspect outgoing requests
- Pin data: Mock API responses by pinning example output

Code Examples

Test a Webhook with curl

bash

# Send a test payload to your n8n webhook
curl -X POST https://your-n8n.com/webhook-test/your-id \
  -H "Content-Type: application/json" \
  -d '{
    "event": "order.created",
    "order_id": "TEST-001",
    "customer": {
      "name": "Test User",
      "email": "test@example.com"
    },
    "items": [
      {"product": "Widget A", "qty": 2, "price": 29.99}
    ]
  }'

Pro Tips

💡Use the -test suffix webhook URL during development — it doesn't require the workflow to be active

Comprehension Quiz

Answer 2 of 2 correctly to unlock lesson completion.

1. What tool can you use to send test payloads to a webhook?

2. What is the -test suffix URL for?

Pass the quiz above to unlock lesson completion

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All lessons in this chapter

1. Data Pinning Basics12m 2. Editing Pinned Data for Edge Cases12m 3. Node-Level & Branch Testing12m 4. Testing Webhooks & External APIs14m