Cal.com experienced a minor incident on September 15, 2026 affecting App and API, lasting 57m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Sep 15, 2026, 06:30 PM UTC
We are currently investigating reports of degraded performance affecting the Cal.com web application
- monitoring Sep 15, 2026, 07:08 PM UTC
We have identified the root cause of the ongoing performance degradation affecting Cal.com. An high-volume query began flooding our system starting at 18:00 UTC, leading to resource contention and slower response times. Our engineering team has successfully reverted the change that introduced the query. We are now observing system metrics stabilize as services recover. Core scheduling and booking flows should progressively return to normal. We will continue to monitor closely and provide a final resolution update shortly.
- resolved Sep 15, 2026, 07:27 PM UTC
Performance metrics have returned to baseline, and booking flows, calendar syncs, and user dashboards are fully functional. Thank you for your patience and understanding while we resolved this issue!