OneSignal incident

Intermittent errors on /api/v1/notifications api

Resolved after 34 minutes, affecting APIs & SDK Endpoints, on September 18, 2026.

resolved Sep 18, 2026, 01:23 AM UTC

/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.

Started
Sep 18, 2026, 12:48 AM UTC
Resolved
Sep 18, 2026, 01:23 AM UTC
Duration
34m
Detected by Pingoru
Sep 18, 2026, 12:48 AM UTC

Affected components

APIs & SDK Endpoints

Update timeline

  1. identified Sep 18, 2026, 12:48 AM UTC

    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. identified Sep 18, 2026, 01:13 AM UTC

    A fix is rolling out now for the affected notifications services that are overloaded. Things should be stable within the next 10 minutes.

  3. resolved Sep 18, 2026, 01:23 AM UTC

    /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.

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