# Device group management on /gcm/notification stops working

Calls to /gcm/notification on Firebase Cloud Messaging stop working on September 29, 2027.

On September 29, 2027, device group management on /gcm/notification will be decommissioned. Calls to the /gcm/notification endpoint will fail after that day. Firebase Cloud Messaging announced that all InstanceId server APIs and device groups are deprecated.

## What to use instead

Send to each FCM registration token using POST /v1/projects/{project}/messages:send instead of a device group. Because device groups have no direct replacement, your code must maintain its own list of registration tokens and dispatch to each one individually.

Device groups have no replacement: the code must keep its own list of registration tokens and send to each.

- API: Firebase Cloud Messaging (fcm.googleapis.com)
- Kind: Removal
- Announced: September 1, 2026
- Takes effect: September 29, 2027
- Calls after that day: fail
- Calls it hits: `/gcm/notification`
- Source: [Announcement](https://firebase.google.com/docs/cloud-messaging/troubleshooting)
- Verified: November 6, 2026, against Firebase Cloud Messaging's own pages
- Page: https://www.okapi.bot/providers/firebase-cloud-messaging/breaking-changes/device-group-management-on-gcm-notification-stops-working/

## Firebase Cloud Messaging's words

> All the InstanceId server APIs and the device group feature are deprecated and will be decommissioned on September 29, 2027.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent