BlogTwilio Webhooks

How to Test Twilio Webhooks

Twilio sends webhook callbacks for SMS delivery status, incoming messages, voice calls, and other communication events.

Twilio Official Webhook Docs

1. Twilio Webhook Events

Twilio can send the following webhook events to your endpoint:

message.sent
message.delivered
message.failed
message.received
call.initiated
call.ringing
call.answered
call.completed
recording.completed
transcription.completed

2. Set Up a Test Endpoint with HookRay

Follow these steps to start receiving Twilio webhooks for testing:

  1. Go to HookRay and click "Start Testing — Free" to get your unique webhook URL.
  2. Copy the URL (e.g., https://h.hookray.com/abc123).
  3. In your Twilio dashboard, navigate to the webhook settings and paste the HookRay URL as your endpoint.
  4. Select the events you want to receive (see list above).
  5. Trigger a test event — HookRay will show the incoming webhook in real-time.

3. Sample Twilio Webhook Payload

Here's an example of what a Twilio webhook payload looks like:

payload.json
{
  "MessageSid": "SM1234567890abcdef",
  "AccountSid": "AC1234567890abcdef",
  "From": "+15551234567",
  "To": "+15559876543",
  "Body": "Hello from Twilio!",
  "MessageStatus": "delivered"
}

4. Common Issues & Troubleshooting

Webhook not arriving?

Check that your endpoint URL is correct and publicly accessible. Twilio cannot reach localhost URLs — use HookRay's cloud URL instead.

Getting 400 or 500 errors?

HookRay accepts any payload and returns 200 OK by default, so the issue is likely on Twilio's side. Check your webhook configuration and event selection.

Need to verify webhook signatures?

Twilio signs webhook requests for security. Use HookRay to capture the raw headers and body, then implement signature verification in your application code.

5. Next Steps

  • Use HookRay's webhook replay feature to re-send captured webhooks while building your handler
  • Enable smart parsing (Pro plan) to see Twilio-specific fields highlighted automatically
  • Check the Twilio webhook documentation for the complete event reference

Ready to test Twilio webhooks?

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