One-shot tool to send a sample payload to your GHL Inbound Webhook so the "Select reference payload" dropdown lights up.
If you refresh the GHL page before hitting Save on the trigger, GHL throws away the URL and gives you a fresh one. So do these steps in order — without refreshing.
↻ reload icon inside the "MAPPING REFERENCE" panel — next to "Select reference payload." (This is a panel-level refresh, not a browser refresh.)If GHL still re-generates the URL on you, just paste the new one in the field above and fire again. Repeat until it sticks. Then save.