The Channel API did not scale well enough for the workloads it was intended for and so did not find wide adoption. Accordingly, support for the Channel API will be turned off on October 31, 2017.
You can use the Firebase Realtime Database to achieve superior realtime functionality in your application. Firebase is a more robust and customizable solution than the Channels API, and it allows communication with a broader set of clients. It currently supports Android, iOS, and apps, and web browser apps.
Migrating from the Channel API
See Using Firebase for realtime events on App Engine for information on replacing Channel API functionality with the Firebase Realtime Database.
Where to get help
If you run into any trouble migrating your application, and you have a support package, you can get help through your normal support channel. If you don't have a support package, you can get help through the support contact form.
With any deprecation there is a follow-up decommission where the API or service is formally removed.
The following table lists the Channel API service shutdown (turndown) schedule:
|Decommission Date||Decommission Event|
|October 31, 2017||The Channel API will be permanently disabled.|