Update slot reservation - Automate.ax

calcom.updateSlotReservation updates one Cal.com slot reservation.

automations/update-slot-reservation.automation.ts

import { automation, markSignificant } from "automate.ax"
import { calcom } from "automate.ax/calcom"

export default automation("Update slot reservation", () => {
  markSignificant(
    calcom.updateSlotReservation({
      uid: "reservation-uid",
      eventTypeId: 23,
      slotStart: "2026-09-10T17:30:00.000Z",
    }),
  )
})

Input

Pass these fields:

Field	Type	Required	Description
`uid`	`string`	Yes	—
`eventTypeId`	`number`	Yes	The ID of the event type for which slot should be reserved.
`slotStart`	`string (date-time)`	Yes	ISO 8601 date string in UTC representing the available slot.
`slotDuration`	`number`	No	By default slot duration is equal to event type length, but if you want to reserve a slot for an event type that has a variable length you can specify it here as a number in minutes. If you don’t have this set explicitly that event type can have one of many lengths you can omit this.
`reservationDuration`	`number`	No	Reservation length in minutes for authenticated API key, access token, or OAuth requests. No one else can book the event type at `start` during this period. Defaults to 5 minutes.

Output

Returns an object with these fields:

Field	Type	Required	Description
`eventTypeId`	`number`	Yes	The ID of the event type for which slot was reserved.
`slotStart`	`string (date-time)`	Yes	ISO 8601 date string in UTC representing the available slot.
`slotEnd`	`string (date-time)`	Yes	ISO 8601 date string in UTC representing the slot end.
`slotDuration`	`number`	Yes	By default slot duration is equal to event type length, but if you want to reserve a slot for an event type that has a variable length you can specify it here. If you don’t have this set explicitly that event type can have one of many lengths you can omit this.
`reservationUid`	`string`	Yes	The unique identifier of the reservation. Use it to update, get or delete the reservation.
`reservationDuration`	`number`	Yes	Reservation length in minutes. No one else can book the event type at `start` during this period.
`reservationUntil`	`string (date-time)`	Yes	ISO 8601 date string in UTC representing when the reservation expires.

Cal.com enforces account role, plan, and availability requirements. Provider rejections surface as structured action failures with the HTTP status and any Retry-After delay.