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POST
/
v2
/
slots
/
reservations
Reserve a slot
curl --request POST \
  --url https://api.cal.com/v2/slots/reservations \
  --header 'Content-Type: application/json' \
  --header 'cal-api-version: <cal-api-version>' \
  --data '
{
  "eventTypeId": 1,
  "slotStart": "2024-09-04T09:00:00Z",
  "slotDuration": "30",
  "reservationDuration": 5
}
'
{
  "status": "success",
  "data": {
    "eventTypeId": 1,
    "slotStart": "2024-09-04T09:00:00Z",
    "slotEnd": "2024-09-04T10:00:00Z",
    "slotDuration": "30",
    "reservationUid": "e84be5a3-4696-49e3-acc7-b2f3999c3b94",
    "reservationDuration": 5,
    "reservationUntil": "2023-09-04T10:00:00Z"
  }
}

Headers

​
cal-api-version
string
default:2024-09-04
required

Must be set to 2024-09-04. If not set to this value, the endpoint will default to an older version.

​
Authorization
string

value must be Bearer <token> where <token> is api key prefixed with cal_ or managed user access token

​
x-cal-client-id
string

For platform customers - OAuth client ID

Body

application/json
​
eventTypeId
number
required

The ID of the event type for which slot should be reserved.

Example:

1

​
slotStart
string
required

ISO 8601 datestring in UTC timezone representing available slot.

Example:

"2024-09-04T09:00:00Z"

​
slotDuration
number

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.

Example:

"30"

​
reservationDuration
number

ONLY for authenticated requests with api key, access token or OAuth credentials (ID + secret).

For how many minutes the slot should be reserved - for this long time noone else can book this event type at `start` time. If not provided, defaults to 5 minutes.
Example:

5

Response

201 - application/json
​
status
enum<string>
required
Available options:
success,
error
Example:

"success"

​
data
object
required