Create a new event call with minimal payload
API key required in Authorization header. Format: iclosed-<token>
ISO 8601 date-time in UTC (e.g. 2026-02-27T12:00:00.000Z)
1^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$Timezone for the booking
1Contact ID (optional if email or phoneNumber is provided)
Invitee email (required when contactId is not provided); must be valid when provided
255^(?!\.)(?!.*\.\.)([A-Za-z0-9_'+\-\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\-]*\.)+[A-Za-z]{2,}$Invitee phone (required when contactId is not provided); must be valid when provided
Invitee first name
Invitee last name
Event ID (optional if linkPrefix is provided)
Event link prefix (e.g. "company/meeting"); resolved to eventId when provided
1Event call created