The Notification API is a technical and architectural concept describing how TripBuilder receives status updates from external live suppliers into an existing booking. It's the webhook receiver built into TripBuilder core where suppliers push a booking status change and it queues, persists, and applies that status update asynchronously to the relevant itinerary or checkout.

Use Notification API when a supplier or third-party integrator needs to push status changes back into TripBuilder after the initial booking call — instead of TripBuilder having to poll the supplier for updates. It's the standard ingestion point for Connect API suppliers (Activities, Ground Transports, Rental Cars, Accommodation).