# Device group management on /iid/notification stops working

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

Calls to the /iid/notification endpoint will fail on September 29, 2027. Firebase Cloud Messaging will decommission this endpoint alongside all InstanceId server APIs and the device group feature. Any requests relying on device group management through this endpoint will no longer work after that day.

## What to use instead

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

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: `/iid/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-iid-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