This section documents the endpoints under their main business functions:
Authentication - Used to authenticate a merchant and receive authentication token required for API calls
Loading - Adding credit to a physical or digital card number
Redeeming - using the physical card number as a method of payment for goods received (with a pin or without a pin)
Balance - check the current balance on a physical or digital card (with a pin or without a pin)
Reverse - undo a transaction that has already been completed
Card Actions - various functions that can happen at card level