# Device group management on /notification stops working

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

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

## What to use instead

Send to each FCM registration token with POST /v1/projects/{project}/messages:send instead of a device group; see Firebase's guide to migrating off device groups.

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

## 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.