@zomars @Agusti @Emrysal @Bailey I noticed that when trying to create a booking via API by doing a POST to

<https://api.cal.com/v1/bookings?apiKey=cal_live_***>

with the same request body, roughly half the requests succeed as they should. However, half the time I get a 500 with the error message

No available users found.

Since the request body is not changing between success or failure, this seems like a server issue. Any idea why this would be happening?

No available users found sounds to me like a conflict - so it found a existing event at the same time you are trying to book.. either in bookings or in your external connected calendars.