# Vapi: Critical incident: Increased rate of call failures

**Summary:** _summary pending_
- Kind: Major incident · Label: critical (vendor)
- Changed: 2026-08-19 18:16 UTC · Detected: 2026-10-19 17:03 UTC
- Source: n/a
- [Company: Vapi](https://rewindex.com/company/vapi.md)
- Versions: before (none: first archived) → after incident\_version:667/1021689@57ae49497505
- Change 1 of 1 for this incident

Incident page (full timeline): [Increased rate of call failures](https://rewindex.com/company/vapi/incidents/1021689.md)
## What changed

**1. Added: Title**

```diff
+ Increased rate of call failures
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-08-19 18:16 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-20 17:20 UTC
```

**6. Added: Update** (downtime) · 2026-08-19 18:16 UTC

```diff
+ We're seeing an increased rate of call failures and the team is actively investigating
```

**7. Added: Update** (downtime) · 2026-08-19 18:36 UTC

```diff
+ We are confirming that calls are not connecting in the US. Our team is still investigating. Next update in 30 min or sooner.
```

**8. Added: Update** (downtime) · 2026-08-19 19:01 UTC

```diff
+ Calls are still failing to connect. Our team has a working hypothesis and we will post as soon as we can confirm the root cause. Next update will be in 30 min or earlier.
```

**9. Added: Update** (degraded) · 2026-08-19 19:26 UTC

```diff
+ We have rolled out a mitigation measure and are seeing improvements in call success rate.
```

**10. Added: Update** (degraded) · 2026-08-19 19:55 UTC

```diff
+ Some customers are reporting concurrency limits issues. We are resetting all limits to zero for all subscriptions. This change will propagate over the next few minutes.
```

**11. Added: Update** (degraded) · 2026-08-19 20:02 UTC

```diff
+ We are seeing recovery on all affected services and have moved to monitoring status.
```

**12. Added: Update** (resolved) · 2026-08-19 20:19 UTC

```diff
+ The incident is resolved.
```

**13. Added: Update** (resolved) · 2026-08-20 17:20 UTC

```diff
+ Incident Report available at https://drive.google.com/file/d/1ORxSZb8NYgVlmPoqnUEdTmlIua3NSl_k/view
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-19 18:16 UTC | Critical incident: Increased rate of call failures (this change) | critical |

All Vapi changes: [timeline](https://rewindex.com/company/vapi/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/iaee037ff831be3 · Markdown: https://rewindex.com/change/iaee037ff831be3.md · JSON: https://rewindex.com/api/v1/changes/iaee037ff831be3 · Generated 2026-10-19T21:43:55.372Z