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AssemblyAI: Some Streaming Sessions are Failing to be Established

Affected components: APIs - Realtime APIStreaming API

Timeline of updates

1. investigating2025-09-29 13:49 UTC

   Between 1:30p and 1:40p GMT there were an increased number of new streaming sessions that were failing to be established. Customers would have received the error message "received 3005 (registered) Session Cancelled: An error occurred; ".

2. investigating2025-09-29 13:50 UTC

   The Streaming API has now returned to full functionality. Our team is still investigating the root cause of this issue.

3. investigating2025-09-29 15:41 UTC

   Our team is still investigating the cause of the elevated errors, but the Streaming API is still continuing to function normally.

4. monitoring2025-09-29 19:32 UTC

   We have continued to see stable performance throughout the day. The Streaming API is operating normally and we are monitoring the effects of recent changes to ensure continued service stability. Our team continues working to determine the root cause of the earlier connection failures.

5. resolved2025-09-30 01:31 UTC

   We have continued to see good performance since rolling back the update that was identified to be the cause of this issue, so we are marking this issue as resolved.

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). AssemblyAI profile · Recent AssemblyAI incidents · Markdown · JSON