Cal.com - Atako

Let your agents list event types, check availability, create/reschedule/cancel bookings, and manage schedules via the Cal.com API.

Connection

Authentication: API key.

Sign in at app.cal.com → Settings → Security → API Keys → New API Key. Name it, copy the key (starts with cal_ for test mode, cal_live_ for live mode).See Cal.com’s documentation.

Read actions (8)

Action	Description
`get_available_slots`	Get available time slots. Provide start (ISO datetime string, UTC), end (ISO datetime string, UTC), and timeZone (IANA tz string, e.g. “Europe/Paris”). Identify the event type with either eventTypeId (number) OR username (string) + eventTypeSlug (string).
`get_booking`	Retrieve a single booking by its UID (string, not numeric ID).
`get_event_type`	Retrieve a single event type by its numeric ID.
`get_me`	Get the authenticated user’s profile (probe).
`get_schedule`	Retrieve a single schedule by its numeric ID.
`list_bookings`	List bookings. Filters: status (upcoming\|past\|cancelled\|recurring\|unconfirmed), attendeeEmail (string), eventTypeId (number), afterStart (ISO datetime string), beforeEnd (ISO datetime string), take (integer 1-100), skip (integer).
`list_event_types`	List all event types for the authenticated user.
`list_schedules`	List all schedules for the authenticated user.

Write actions (6)

Action	Description
`cancel_booking`	Cancel a booking. Arguments: bookingUid (string, path), cancellationReason (optional string).
`create_booking`	Create a booking. Arguments: start (ISO datetime string in UTC, e.g. “2026-01-15T09:00:00Z”), eventTypeId (number) OR eventTypeSlug (string) + username (string), attendee object with name (string), email (string), timeZone (IANA tz string, e.g. “America/New_York”), language (optional string, e.g. “en”), guests (optional array of email strings), metadata (optional object of string key-value pairs), bookingFieldsResponses (optional object of custom field slug → value).
`create_event_type`	Create an event type. Arguments: title (string), slug (string), lengthInMinutes (integer, e.g. 30), description (optional string).
`create_schedule`	Create a schedule. Arguments: name (string), timeZone (IANA tz string, e.g. “Europe/Paris”), isDefault (optional boolean), availability (optional array of objects with days (array of day strings: Monday-Sunday), startTime (HH:MM string), endTime (HH:MM string)).
`reschedule_booking`	Reschedule an existing booking. Arguments: bookingUid (string, path), start (ISO datetime string in UTC), reschedulingReason (optional string).
`update_event_type`	Update an event type. Arguments: eventTypeId (number, path). Any of: title (string), slug (string), lengthInMinutes (integer), description (string).

Permissions

Every action above must be explicitly granted to an agent before it can be used. See Permissions for the grant model and Security for how credentials are protected.

Last reviewed against the provider API: September 2026.