Register a New Callback for Event Notifications

Follow these steps to register a new callback for event notifications in Marketing Cloud Engagement.

1. In Marketing Cloud Engagement Setup, in the Quick Find Box, enter callbacks and then select URL Callbacks.
2. Click Register New.
3. Enter a name, URL, and maximum batch size for the callback.
4. Save the callback.
   Marketing Cloud Engagement sends a POST request to the URL for the callback. The request contains a JSON object with a callbackId value and a verificationKey value, as shown in this example.

   {
     "callbackId": "fd5f6273-5505-49ba-b094-c7a99b086e33",
     "verificationKey": "3py0I4jawlzoUNAEB1he4Dn9foUdT9yQZWtTexamP1e0="
   }

5. On the URL Callbacks page in Setup, next to the callback you created, click Verify.
6. In the Verification Key field, paste the verification key from the POST request that Marketing Cloud Engagement sent to your callback URL.
7. Click Verify.