The HTTP / 2-based Apple Push Notification Service (APNs) API provider allows you to take advantage of great features such as authentication with a JSON Web Token, enhanced error message and feedback per alert. If you send push notifications with the older binary protocol, we strongly recommend upgrading to the API provider’s API.
To give you extra time to prepare, the deadline to upgrade to the APNs Provider API has been extended to March 31, 2021. APNs will no longer support the older binary protocol after this date.
Learn about the APNs Vendor API