# Vapi: Increased rate of call failures

- Impact (vendor’s label): critical
- Status: resolved
- Started: 2026-08-19 18:16 UTC · Resolved: 2026-08-20 17:20 UTC · Duration: 23 h
- Updates: 8 · Affected components: Vapi API, Vapi API \[Weekly\], Vapi SIP, Vapi Dashboard, SIP Outbound
- Vendor status page: n/a
- [Company: Vapi](https://rewindex.com/company/vapi.md)

## Timeline of updates

- **downtime** 2026-08-19 18:16 UTC: We're seeing an increased rate of call failures and the team is actively investigating
- **downtime** 2026-08-19 18:36 UTC: We are confirming that calls are not connecting in the US. Our team is still investigating. Next update in 30 min or sooner.
- **downtime** 2026-08-19 19:01 UTC: 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.
- **degraded** 2026-08-19 19:26 UTC: We have rolled out a mitigation measure and are seeing improvements in call success rate.
- **degraded** 2026-08-19 19:55 UTC: 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.
- **degraded** 2026-08-19 20:02 UTC: We are seeing recovery on all affected services and have moved to monitoring status.
- **resolved** 2026-08-19 20:19 UTC: The incident is resolved.
- **resolved** 2026-08-20 17:20 UTC: Incident Report available at https://drive.google.com/file/d/1ORxSZb8NYgVlmPoqnUEdTmlIua3NSl\_k/view

## Rewindex changes for this incident

- 2026-08-19 18:16 UTC: [Critical incident: Increased rate of call failures](https://rewindex.com/change/iaee037ff831be3.md)


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Canonical: https://rewindex.com/company/vapi/incidents/1021689 · Markdown: https://rewindex.com/company/vapi/incidents/1021689.md · JSON: https://rewindex.com/api/v1/companies/vapi/incidents/1021689 · Generated 2026-10-19T21:07:28.499Z