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Cal.com Outage History

Every past Cal.com outage tracked by IsDown, with detection times, duration, and resolution details.

There were 7 Cal.com outages since February 2025. The 6 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor April 15, 2026

April 2026: Delayed webhook delivery

Detected Apr 15, 2026 11:12 AM EDT · Resolved Apr 15, 2026 12:20 PM EDT · Duration about 1 hour

Cal.com experienced delayed webhook delivery due to DNS resolution issues with one of their providers in the us-east-1 region. The incident affected the main App component and caused webhooks to be sent with delays rather than in real-time. The issue lasted 1.1 hours while the team worked with their provider to resolve the DNS problems.

Minor April 6, 2026

April 2026: Intermittent issues loading data on app.cal.com dashboard

Detected Apr 6, 2026 7:54 AM EDT · Resolved Apr 6, 2026 8:14 AM EDT · Duration 21 minutes

Cal.com experienced intermittent issues on the app.cal.com dashboard where users encountered errors claiming a commercial license was needed. The App component was affected for 21 minutes. The incident was resolved after investigation into the licensing error messages.

Major March 6, 2026

March 2026: Degraded service for creating bookings via API v2

Detected Mar 6, 2026 10:48 PM EST · Resolved Mar 6, 2026 11:04 PM EST · Duration 16 minutes

Cal.com experienced 502 Bad Gateway errors on their API v2 bookings endpoint, preventing users from creating new bookings through the API. The incident affected the API component and lasted 16 minutes before being resolved.