Between the times of 14:57 UTC - 15:35 UTC, we saw elevated rates of errors, and Google Calendar users may have had slight delays to calendar reads and writes. Since 15:35 UTC everything has been functioning as normal.
Posted Jul 18, 2025 - 16:55 UTC
Monitoring
Google's API error rate has dropped again and held at a normal level for the past 10 minutes, and both read and write operations to Google Calendar profiles appear to be back to our normal level of performance.
We'll continue to monitor and confirm this holds out.
Posted Jul 18, 2025 - 15:48 UTC
Identified
Google is returning a higher rate of 5xx errors when we try to perform token refresh operations. Approximately 1/3rd of our attempts to refresh tokens are seeing this error.
The increase in errors started approximately 14:57 UTC.
It appears our normal mechanisms are allowing retries to be processed successfully, and limiting the impact to the wider service.
Updates to and from Google Calendar profiles may see slight delays during this time.