The Time Off API centers around two primary concepts: requests and history.
Requests represent an employee's ask to take time off. A request must be approved before it's recorded in the history, though users with sufficient permissions can create and approve a request in the same step.
History is a running log of every event that affects an employee's time off balance. The current balance is the sum of all history events, with accruals adding to it and time off used reducing it.