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Update your apps to the latest Firebase Cloud Messaging APIs and SDKs


On December 5th, 2023 you may have received an email that begins as follows....

We’re writing to remind you that starting June 20, 2024 the legacy Firebase Cloud Messaging (FCM) APIs will be discontinued.

What do you need to know?

On June 20, 2024, we’re reducing the number of Firebase Cloud Messaging (FCM) legacy register APIs and legacy send APIs that provide similar functionality. This step will allow us to provide you with a more consistent experience and align with Google security standards to improve security, reliability and performance.

Because of these API decommissions, some already-deprecated SDKs and features will stop working after June 20, 2024.

Please consult the tables below to find which Firebase Cloud Messaging (FCM) APIs and corresponding services/SDKs/features will be discontinued and replaced with new alternatives.


We are currently looking into this and will update this article with details as we have more details. You can use Using Email to stay updated on KB updates to watch this article so that you get email updates as it is updated. When we have any action for you to take we'll also send out an email to all customers so that you don't have to search the KB to be aware of the change.


Currently, our development team is looking at this issue and the solution. The planned fix for this is targeted for 15.4.0 which should be at the beginning of May 2024. The changes will be communicated, but plan on upgrading to 15.4.0 before the June 20th, 2024, EOL for Firebase to get the changes in place.