# Cartesia: Major incident: Degraded API Performance in US Regions

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-10-07 16:29 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://status.cartesia.ai/incidents/01M4CAGW6BB52AVXQXAK4Q7ECF](https://status.cartesia.ai/incidents/01M4CAGW6BB52AVXQXAK4Q7ECF)
- [Company: Cartesia](https://rewindex.com/company/cartesia.md)
- Versions: before (none: first archived) → after incident\_version:674/01M4CAGW6BB52AVXQXAK4Q7ECF@d9ab269c19bf
- Change 1 of 1 for this incident

Incident page (full timeline): [Degraded API Performance in US Regions](https://rewindex.com/company/cartesia/incidents/01M4CAGW6BB52AVXQXAK4Q7ECF.md)
## What changed

**1. Added: Title**

```diff
+ Degraded API Performance in US Regions
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-07 16:29 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-07 22:23 UTC
```

**6. Added: Update** (investigating) · 2026-10-07 16:29 UTC

```diff
+ Customers in the US regions are facing increased latency for some API requests.
```

**7. Added: Update** (monitoring) · 2026-10-07 16:50 UTC

```diff
+ The root cause has been identified as a change that led to increased load in our internal caching service. We have mitigated the issue on our end and are continuing to monitor the state of our service.
```

**8. Added: Update** (investigating) · 2026-10-07 21:13 UTC

```diff
+ Our caching service briefly experienced increased load due to the same configuration change, leading to increased latency in US regions again.
```

**9. Added: Update** (monitoring) · 2026-10-07 21:16 UTC

```diff
+ This degradation has been quickly mitigated; we are closely monitoring performance for all key endpoints in the US regions.
```

**10. Added: Update** (resolved) · 2026-10-07 22:23 UTC

```diff
+ The replacement for the offending change has been deployed. The incident is resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-07 16:29 UTC | Major incident: Degraded API Performance in US Regions (this change) | major |

All Cartesia changes: [timeline](https://rewindex.com/company/cartesia/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/ia636dbef49d55f · Markdown: https://rewindex.com/change/ia636dbef49d55f.md · JSON: https://rewindex.com/api/v1/changes/ia636dbef49d55f · Generated 2026-10-20T00:00:45.133Z