BlogSendGrid Webhooks

How to Test SendGrid Webhooks

SendGrid sends Event Webhooks for email delivery events — delivered, opened, clicked, bounced, and spam reports.

SendGrid Official Webhook Docs

1. SendGrid Webhook Events

SendGrid can send the following webhook events to your endpoint:

delivered
open
click
bounce
dropped
deferred
spam_report
unsubscribe
group_unsubscribe
group_resubscribe

2. Set Up a Test Endpoint with HookRay

Follow these steps to start receiving SendGrid 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 SendGrid 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 SendGrid Webhook Payload

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

payload.json
{
  "email": "user@example.com",
  "event": "delivered",
  "sg_message_id": "abc123.filter0001.12345",
  "timestamp": 1710000000,
  "category": [
    "marketing"
  ]
}

4. Common Issues & Troubleshooting

Webhook not arriving?

Check that your endpoint URL is correct and publicly accessible. SendGrid 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 SendGrid's side. Check your webhook configuration and event selection.

Need to verify webhook signatures?

SendGrid 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 SendGrid-specific fields highlighted automatically
  • Check the SendGrid webhook documentation for the complete event reference

Ready to test SendGrid webhooks?

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Start Testing SendGrid Webhooks — Free

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