When using the new Rentals feature inside Calendars, booking webhooks do not include rental-specific data such as check-in date, check-out date, or custom fields.
Custom Data keys are sent but arrive empty, which makes native integrations unreliable.
This forces developers to use workarounds like:
Sending only mediumId via webhook
Calling the GHL API (Get Appointments for Contact) to retrieve dates
It would be very helpful if Rentals Calendars exposed:
  • start_date / end_date
  • rental custom fields
  • full booking object
directly in webhooks, similar to standard Appointments. This is critical for PMS and OTA integrations.