OneSignal incident

Intermittent errors on /api/v1/notifications api

Minor Resolved View vendor source →

OneSignal experienced a minor incident on September 18, 2026 affecting APIs & SDK Endpoints, lasting 34m. The incident has been resolved; the full update timeline is below.

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

    Status: 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. Affected components APIs & SDK Endpoints (Partial outage)

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

    Status: Identified A fix is rolling out now for the affected notifications services that are overloaded. Things should be stable within the next 10 minutes. Affected components APIs & SDK Endpoints (Partial outage)

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

    Status: 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. Affected components APIs & SDK Endpoints (Operational)