Cancel appointment
Cancel an appointment, optionally marking a no-show.
POST https://cotlet.dev/api/v1/acuity-scheduling/appointments/{appointment_id}/cancel
write Confirm
Cancels one appointment. A cancellation cannot be undone, but the appointment stays viewable. Pass a note to include it in the cancellation message, and mark_no_show to record that the client did not come. Acuity emails and texts the client unless send_notification is false. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| appointment_id integer required | integer | Appointment ID from list_appointments. |
| cancel_note string | string | Text included in the cancellation message to the client. |
| mark_no_show boolean | boolean | true records a no-show. Default: false. |
| send_notification boolean | boolean | false sends no email or text. Default: true. |
Request
curl -X POST https://cotlet.dev/api/v1/acuity-scheduling/appointments/1/cancel \
-H "Authorization: Bearer $COTLET_API_KEY"result = client.call("acuity-scheduling", "cancel_appointment", {"appointment_id":1})const result = await cotlet.call('acuity-scheduling', 'cancel_appointment', {"appointment_id":1});cotlet call acuity-scheduling cancel_appointment --data '{"appointment_id":1}'Example response
{
"appointment_id": 1840299,
"first_name": "Marc",
"last_name": "Dubois",
"type": "Annual review",
"datetime": "2026-11-05T14:00:00-0500",
"canceled": true,
"no_show": false,
"notified_client": true
}