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OneSignal change history: Subscription API - Creation Failures
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Subscription API - Creation Failures OneSignal’s Subscription API had a major outage preventing all customers from creating new subscriptions from 2026-09-22 21:05 UTC to 2026-09-22 21:30 UTC, lasting 25 min. A mitigation was applied at 21:19 UTC, and OneSignal confirmed all impacted systems were operating normally at resolution. | Major incident |