Outage in Telnyx
SDK Client Credential API Failure
Resolved Major
August 04, 2026 - Started 5 days ago
- Lasted 1 day
Incident Report
Summary AI Generated
**Telnyx experienced a 40-hour major outage affecting the Client Credential API**, causing HTTP 503 errors that prevented telephony token creation and validation, resulting in Voice SDK authentication failures, failed registrations, and new call setup failures. Existing active calls were largely unaffected. The root cause was a backend capacity issue, resolved by scaling up service pods and increasing CPU and memory allocation, after which 503 errors ceased and the service stabilized.
customers may receive HTTP 503 responses from the Client Credential API, which can prevent telephony token creation or validation. This may cause Voice SDK authentication failures, failed registrations, and new call setup failures. Existing active calls are likely unaffected unless they require a fresh token/API call.
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Latest Updates ( sorted recent to last )
MONITORING
5 days ago - at 08/04/2026 07:00PM
We identified a capacity issue in the backend service that manages telephony tokens and client SDK credentials. This caused intermittent failures for some credential-related API requests.
We increased the number of service pods and raised CPU and memory allocation to better handle request volume. Since making these changes, we are no longer seeing the related 503 errors at the API gateway.
The service is currently stable, and we will continue monitoring closely while the incident remains in the monitoring phase.
INVESTIGATING
5 days ago - at 08/04/2026 05:19PM
customers may receive HTTP 503 responses from the Client Credential API, which can prevent telephony token creation or validation. This may cause Voice SDK authentication failures, failed registrations, and new call setup failures. Existing active calls are likely unaffected unless they require a fresh token/API call.
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