Outage in Amplitude
Experiment Management API Degradation
Resolved MajorIncident Report
Summary AI Generated
Amplitude's Experiment Flags Management API (/api/1/flags) experienced a 2.5-hour degradation, returning incomplete or empty responses when customers attempted to list feature flags via the API. The issue was isolated to the management API only - feature flags remained visible in the Amplitude UI and continued to evaluate correctly for end users. The team identified the root cause, deployed a fix, and fully resolved the incident with no data loss.
Since 2026-03-20 approximately 09:00 AM PT (16:00 UTC), the Experiment Flags Management API (/api/1/flags) has been returning incomplete results. Customers using the Flags Management API may see empty responses when listing feature flags, even though flags remain visible and functional in the Amplitude UI. The Experiments API (/api/1/experiments) is not affected.
Our team has identified the root cause and a fix has been deployed. We are monitoring the rollout to confirm the issue is fully resolved. No data has been lost, and flags continue to evaluate correctly for end users. No customer action is needed at this time.
We will provide the next update by 2026-03-20 12:00 PM PT (19:00 UTC).
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Latest Updates ( sorted recent to last )
RESOLVED
3 days ago - at 03/20/2026 08:00PM
This incident has been resolved.
MONITORING
3 days ago - at 03/20/2026 07:13PM
We have verified the fix, and the management-api is now fully operational. We will remain in a period of active monitoring to ensure continued stability.
IDENTIFIED
3 days ago - at 03/20/2026 05:31PM
Since 2026-03-20 approximately 09:00 AM PT (16:00 UTC), the Experiment Flags Management API (/api/1/flags) has been returning incomplete results. Customers using the Flags Management API may see empty responses when listing feature flags, even though flags remain visible and functional in the Amplitude UI. The Experiments API (/api/1/experiments) is not affected.
Our team has identified the root cause and a fix has been deployed. We are monitoring the rollout to confirm the issue is fully resolved. No data has been lost, and flags continue to evaluate correctly for end users. No customer action is needed at this time.
We will provide the next update by 2026-03-20 12:00 PM PT (19:00 UTC).
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