Mark No-Show

cal.mark_absent

ActionBusiness appsconnection required

Calls the Cal.com API with the connection's credentials.

Record that the host or named attendees did not turn up for a booking.

Connection

Required: Yes — the node will not save without one
Auth type: API key
Providers: Cal.com
Secret shape: the Cal.com API key (cal_live_… / cal_test_…), or {"api_key": "…"}
Config it needs: base_url
Resolved by: config.connection_id, else node.connection_id

3 fields, 1 required. A dotted path is a nested object and name[] an array of objects — the editor renders the same tree.

Field	Type	Required	Default	Constraints	Example
booking_uid The booking's uid, as it appears in Cal.com and in every webhook payload (not the numeric bookingId).	string	Yes	—	—	2NtaeaVcKfpmSZ4CthFdfk
host Mark the host absent. Leave unset to say nothing about the host and only update attendees.	boolean	No	—	—	—
attendees Attendees to update, as a JSON array of {"email": "…", "absent": true} objects.	array	No	—	array of object	[{"absent":true,"email":"john.doe@example.com"}]

Every value below is the contract’s own example or default — nothing invented.

{
  "attendees": [
    {
      "absent": true,
      "email": "john.doe@example.com"
    }
  ],
  "booking_uid": "2NtaeaVcKfpmSZ4CthFdfk"
}

One shape.

Field	Type	Example
booking The booking with its no-show flags updated.	object	—
marked True once Cal.com accepted the no-show update.	boolean	true

{
  "booking": {},
  "marked": true
}

In a technical demo we add the Cal.com connection, drop the node on the canvas and let Workflow Health pre-flight it before the first real run.