Calculates the estimated source or destination amount for a given currency pair and exchange. Uses the same rate logic as order creation.
Partner API key. Format: sk_branch_<32chars>, sk_personal_<32chars>, or pk_<32chars> (public, read-only)
Exchange office ID
1
Source currency ID
1
Destination currency ID
2
Amount to convert
1000
Whether amount is in source or destination currency
source, dest "source"