Sivo APIs expect amounts to be provided in the currency's smallest denomination. For example, to transfer US$10.00 you would set the amount value to 1000, which represents a thousand cents (calculated as 10 multiplied by 100 cents per dollar).
For decimals that do not use cents (e.g. JPY) you won't need to multiply the amount. In this case, ¥10 is represented as 10.