Major incident

OneSignal: Intermittent errors on /api/v1/notifications api

Current status of OneSignal: Operational — live OneSignal status

Timeline

1. Sep 18, 2026, 00:48 UTC
   identified
   We have identified the root cause and are working towards a resolution. Heavy load on one of our notification services is causing intermittent errors when trying to create a notification. Not all customers are affected. The team is working on adding more capacity to the affected service. We will provide another update in 15 minutes.
2. Sep 18, 2026, 01:13 UTC
   identified
   A fix is rolling out now for the affected notifications services that are overloaded. Things should be stable within the next 10 minutes.
3. Sep 18, 2026, 01:23 UTC
   resolved
   /api/v1/notifications create endpoint is now stable for all customers. The team has scaled up resources to handle increased load on our notifications service.

Updates as published by OneSignal.