Free/ Busy API
The Free/ Busy data gives you information about a particular user's availability at a particular period of time. Using this API, you can get the free/ busy schedules of a list of attendees or one particular user as well and schedule your meetings accordingly.
The/freebusy endpoint is used to access and make changes to the API. The method that is used in Free/ Busy API is GET.
Methods:
GET - Get user's free/ busy details
Gets the free/ busy details of a particular user across all the calendars.