The documentation says:
To make our platform support all currencies and to prevent rounding errors, amounts are stored as natural numbers, pared with an exponential. This exponential defines at which position the decimal point/comma is placed, counting from the right.
Say we have and amount of $12.34 USD. It will be stored and presented as 1234 with an exponential of 2. Some currencies, like the Japanese Yen, have no exponential. A transaction amount of ¥1,000 JPY is stored as 1000.
https://api.spryngpayments.com/v1/#section/Using-the-API/Currencies-and-Amounts
So, which currencies besides Japanese Yen are zero-decimal?