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OneSignal: Intermittent errors on /api/v1/notifications api
OneSignal reported major intermittent errors creating notifications through /api/v1/notifications, affecting some customers from 2026-09-18 00:48 UTC until resolution at 2026-09-18 01:23 UTC (34 min). Heavy load on a notification service caused the errors; OneSignal scaled up resources and confirmed the endpoint was stable for all customers.
Machine-written from the archived incident (Sol). Check the timeline before relying on it.
Affected components: APIs & SDK Endpoints
Timeline of updates
- 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.
- identified
A fix is rolling out now for the affected notifications services that are overloaded. Things should be stable within the next 10 minutes.
- 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.
Rewindex changes for this incident
- Major incident: Intermittent errors on /api/v1/notifications api 2026-09-18 00:48 UTC
Impact, status and times are the vendor’s own, as last archived. View on status.onesignal.com (opens in new tab). OneSignal profile · Recent OneSignal incidents · Markdown · JSON