How to Test Klaviyo Webhooks

Klaviyo webhooks fire when profiles update, subscribe, or unsubscribe — letting you keep CRM and email systems in sync with audience changes.

Looking for the broader picture? See the 7 best webhook testing tools (2026), or if you're already on Webhook.site, the 60-second migration to HookRay.

1. Klaviyo Webhook Events

Klaviyo can send the following webhook events to your endpoint:

2. Set Up a Test Endpoint with HookRay

Follow these steps to start receiving Klaviyo 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 Klaviyo 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 Klaviyo Webhook Payload

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

{
  "data": {
    "type": "profile",
    "id": "01H6EXAMPLEPROFILEID",
    "attributes": {
      "email": "subscriber@example.com",
      "first_name": "Mei",
      "last_name": "Wong",
      "subscriptions": {
        "email": {
          "marketing": {
            "consent": "SUBSCRIBED"
          }
        }
      }
    }
  },
  "meta": {
    "event_type": "profile.subscribed_to_email"
  }
}

4. Frequently Asked Questions

5. Next Steps

• Use HookRay's webhook replay feature to re-send captured webhooks while building your handler
• Use the sample Klaviyo payload above as a cheat sheet for the fields you'll need to extract in your handler
• Check the Klaviyo webhook documentation for the complete event reference