# OneSignal: Major incident: Subscription API - Creation Failures

**Summary:** 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. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-22 21:05 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://status.onesignal.com/incidents/01M35GAZEEMKKPMMRY4GM83WDC](https://status.onesignal.com/incidents/01M35GAZEEMKKPMMRY4GM83WDC)
- [Company: OneSignal](https://rewindex.com/company/onesignal.md)
- Versions: before (none: first archived) → after incident\_version:123/01M35GAZEEMKKPMMRY4GM83WDC@84e4f95cf143
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Subscription API - Creation Failures
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-22 21:05 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-22 21:30 UTC
```

**6. Added: Update** (investigating) · 2026-09-22 21:05 UTC

```diff
+ What’s happening: Customers are unable to create new subscriptions Who’s affected: All customers trying to create new subscriptions  Current Status: We are investigating the issue
```

**7. Added: Update** (monitoring) · 2026-09-22 21:19 UTC

```diff
+ We have applied a mitigation that should resolve the impact. We are monitoring to confirm effectiveness.
```

**8. Added: Update** (resolved) · 2026-09-22 21:30 UTC

```diff
+ The issue has been resolved. All impacted systems are now operating normally.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-22 21:05 UTC | Major incident: Subscription API - Creation Failures (this change) | outage |

All OneSignal changes: [timeline](https://rewindex.com/company/onesignal/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/if9bea7df6e2734 · Markdown: https://rewindex.com/change/if9bea7df6e2734.md · JSON: https://rewindex.com/api/v1/changes/if9bea7df6e2734 · Generated 2026-10-18T02:28:25.397Z