Cal.com

See the uptime of Cal.com

Mar 7, 2026

1 hour ago

Degraded service for creating bookings via API v2

API

Resolved · March 7 at 4:03 AM (in 15 minutes)

We identified and resolved the issue. Apologies for the disruption.

Investigating · March 7 at 3:48 AM (15 minutes earlier)

We are seeing 502 Bad Gateway errors on the api.cal.com/v2/bookings endpoint for POST.

Feb 12, 2026

23 days ago

We are currently experiencing problems with our email provider

AppAPI

Monitoring · February 12 at 10:04 PM

Queued emails from our primary email provider are now being sent. We are still using a secondary email provider to send emails as we continue to monitor the situation.

Note: Late booking reminder workflow emails may be sent as part of the queued emails.

Identified · February 12 at 4:58 PM (5 hours earlier)

Emails are being sent via an alternate provider until our primary provider has recovered and resumed operations.

Investigating · February 12 at 3:33 PM (1 hour earlier)

All emails being sent from Cal are currently not being delivered to inboxes. We are working with our email provider on resolving this issue and to send all queued emails during this time. There is no impact on scheduling bookings.

Jan 27, 2026

1 month ago

Degraded database performance

AppWebsiteAPI

Monitoring · January 27 at 6:06 PM

We have reverted a change that was causing extra load from all logged in users of the Cal.com app. The system is stabilizing and we are actively monitoring.

Investigating · January 27 at 4:18 PM (2 hours earlier)

A large spike in our database is causing degraded performance. We are urgently investigating.

Nov 18, 2025

4 months ago

Our upstream provider Cloudflare is experiencing Global Network Issues that are affecting Cal.com

AppWebsiteAPI

Monitoring · November 18 at 12:01 PM

We are actively monitoring https://www.cloudflarestatus.com/incidents/8gmgl950y3h7 for updates.

Aug 20, 2025

7 months ago

We are experiencing a major degradation of service across the app

App

Resolved · August 20 at 5:04 PM (in 18 minutes)

Our downstream provided resolved the issue triggering this. Service has been restored.

Identified · August 20 at 4:54 PM (10 minutes earlier)

One of our downstream providers has informed us they are fixing an issue and it will be addressed within the next few minutes.

Investigating · August 20 at 4:47 PM (8 minutes earlier)

Jun 11, 2025

9 months ago

Some requests to Google Calendar failing

Resolved · June 23 at 3:30 PM (in 12 days)

This has been resolved. Service is back to normal.

Investigating · June 23 at 2:13 PM (1 hour earlier)

We are again seeing some calls to Google Calendar APIs failing which will impact events being created and removed. We are urgently investigating.

Resolved · June 11 at 3:24 PM (12 days earlier)

We have confirmed the fix brings systems back to normal.

Monitoring · June 11 at 2:41 PM (43 minutes earlier)

We identified what was causing requests to Google Calendar to fail and are monitoring to verify systems are back to normal.

Investigating · June 11 at 2:28 PM (14 minutes earlier)

We are seeing a small % of failing requests to modify calendar events on Google Calendar.

Jun 20, 2025

9 months ago

We are experiencing some downtime due to database issues.

Resolved · June 20 at 1:41 PM (in 57 minutes)

Systems are back to normal.

Monitoring · June 20 at 1:14 PM (28 minutes earlier)

We have found the root cause and have a fix in place. We will continue to monitor to ensure all systems are back.

Investigating · June 20 at 12:44 PM (30 minutes earlier)

We large spike in traffic has caused stress on our database. We are investigating urgently.

Apr 23, 2025

11 months ago

Database issues causing 500s

Resolved · April 23 at 4:52 PM (in 4 hours)

We have found and fixed the root cause of these issues.

Identified · April 23 at 12:26 PM (4 hours earlier)

We are seeing 500s happening on both the web app and API due to a database overload issue. We are actively investigating and will provide updates as soon as possible.

Mar 24, 2025

1 year ago

Brief Booking Page downtime (404 Error)

Resolved · March 24 at 2:00 AM

Due to a faulty deployment, for a brief moment at 11pm EST the booking pages returned a 404 error for about 15 minutes. This was quickly resolved.

Feb 18, 2025

1 year ago

DDOS Database error (code 500)

Resolved · February 18 at 3:21 PM

We got hit by an uncaught DDOS which temporarily broke the application and threw a 500 error and experienced a downtime of 2 minutes.

Feb 4, 2025

1 year ago

Emails not being sent.

Resolved · February 4 at 12:50 PM

Emails are currently not being sent due to a false positive restriction in our Twilio Sendgrid account. The restriction is being lifted.

Apr 14, 2024

2 years ago

Planned Maintenance

Identified · April 14 at 5:03 PM

We are currently performing planned maintenance. Cal.com will be back up and running shortly.

Mar 12, 2024

2 years ago

We are currently investigating issues with our database.

Resolved · March 12 at 6:17 PM (in 9 minutes)

Problem has been solved.

Investigating · March 12 at 6:07 PM (9 minutes earlier)

We are currently investigating an issue with our database causing slowness of the system.

Feb 3, 2024

2 years ago

slowness of several endpoints

App

Resolved · February 3 at 9:33 PM (in 43 minutes)

We've successfully managed to fight off this attack and are recovering systems.

Identified · February 3 at 9:05 PM (28 minutes earlier)

We have identified a coordinated DDOS attack and failed SQL injection attempts from German IP addresses

Identified · February 3 at 8:55 PM (10 minutes earlier)

We are not excluding a third-party coordinated attack. Experiencing unusual activity on some serverless actions

Identified · February 3 at 8:50 PM (5 minutes earlier)

We are currently experiencing severe slowness on multiple endpoints