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Track UTMs via Thank-You Page Webhook

UTM attribution overview

Send full HandL UTM Grabber attribution from Cal.com UTM Tracking Integration bookings to Zapier, Make, or your CRM using a custom confirmation page and webhook.

Primary setup: How to Track UTMs in Cal.com

Custom confirmation redirect

Configure your booking tool to redirect to a WordPress thank-you page after booking. Pass the customer email in the redirect URL if supported.

Webhook script on thank-you page

Use the script from Triggering Zapier on Thank you Page to merge URL parameters with handl_utm and send to your webhook.

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