Calendar
List open slots
The times that are actually free, grouped by day. Worked out from working hours, buffers, existing bookings and any connected Google or Outlook calendar - never offer a time this did not return. Requires scope calendar:read.
GET
List open slots
Authorizations
API key from Developer dashboard (Bearer token).
Query Parameters
From the event types endpoint.
ISO 8601 start of the window. Defaults to now.
ISO 8601 end. Defaults to 7 days after start; 62 days is the maximum span.
IANA timezone identifier, e.g. Europe/Athens. Must be an identifier, NOT an abbreviation like EEST - the calendar rejects those.

