Klaviyo outage, 26 April 2026

API 503 Errors

Started
Resolved
26 Apr 2026, 08:11 UTC (after 47 min)
Impact
Minor
Affected
Server-side

Last update from Klaviyo

We confirmed that all API activity has been stable since the fix was released. Any requests that returned 503 errors during the outage window will need to be retried. This incident has been resolved.

26 Apr 2026, 08:11 UTC

Read the full incident on the official Klaviyo status page

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