USD or EUR. The value of a currency is represented in micros. For USD, $5.50 is encoded as 5.50*1e6, or 5,500,000. To represent a “whole value”, you need to multiply the local micro by 1e6 (1_000_000) for all currencies.
The Ads API recognizes official currencies of all countries where the X SMB Ads product is available. For a complete list of these countries, please click here.
Most currencies have a “precision” of two (like USD: $1.23).
AED,VEF,PKR,IDR,HKD,QAR,PHP,NZD,INR,EUR,ARS,THB,MXN,EGP,DZD,SAR,LBP,COP,TRY,SGD,MAD,AUD,USD,MYR,CAD,BRL,GBP.
VND,KRW,CLP,JPY
KWD,IQD,BHD,TND