We updated the Delivery Promise Notification API with a new PATCH endpoint that lets marketplaces update delivery promises (SLAs) for an external seller item in near real time. This keeps shipping estimates accurate across the storefront and reduces customer friction caused by outdated delivery information.

• New endpoint: PATCH Update delivery promises for an external seller’s item.
• New deliveryZoneIds: Added new deliveryZoneIds values to the PUT Update product availability endpoint.

This change improves the accuracy and timeliness of delivery information shown to shoppers. With this endpoint, marketplaces can promptly adjust SLAs for external seller offers when logistics inputs change, reducing customer friction and preventing outdated delivery promises from being shown.

If you integrate with the Delivery Promise Notification API:

• Review the updated schema and examples.
• Update your marketplace integration to call the new endpoint whenever delivery-related inputs for an external seller item change.
• For more information about this feature, see the Delivery Promise guide.