# Chargebee: Major incident: API Service Degradation

**Summary:** Chargebee reported major API degradation across AU, EU and US, with intermittent 5xx errors caused by an internal change; reverting it restored stability. The stated impact window was 10:06 UTC to 10:17 UTC on 2026-05-18, while recorded start and resolution were both 2026-05-18 11:05 UTC (computed duration: 0 min). _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-05-18 11:05 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/cxh7rjf0h4dt](https://stspg.io/cxh7rjf0h4dt)
- [Company: Chargebee](https://rewindex.com/company/chargebee.md)
- Versions: before (none: first archived) → after incident\_version:294/td2vmq4hy5w0@1f6b8f2d3ffa
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ API Service Degradation
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-05-18 11:05 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-05-18 11:05 UTC
```

**6. Added: Affected components**

```diff
+ API (AU), API Endpoints - API (AU), API Endpoints - API (EU), API Endpoints - API (US), API (EU), API (US)
```

**7. Added: Update** (resolved) · 2026-05-18 11:05 UTC

```diff
+ We experienced an issue causing intermittent 5xx errors across all regions, which was traced back to an internal change. We have reverted it to restore full stability. We apologize for any inconvenience this may have caused. Update: Impact Window: 10:06 UTC to 10:17 UTC
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-05-18 11:05 UTC | Major incident: API Service Degradation (this change) | degradation |

All Chargebee changes: [timeline](https://rewindex.com/company/chargebee/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/i90afe646bb3faf · Markdown: https://rewindex.com/change/i90afe646bb3faf.md · JSON: https://rewindex.com/api/v1/changes/i90afe646bb3faf · Generated 2026-10-18T01:29:47.588Z