https://www.zoho.eu/books/api/v3/#Currency_List_Currencies
It returns a response like:
[
{
"currency_code": "AUD",
"currency_format": "1,234,567.89",
"currency_id": "777524000000000105",
"currency_name": "AUD- Australian Dollar",
"currency_symbol": "$",
"effective_date": "",
"exchange_rate": 0,
"is_base_currency": false,
"price_precision": 2
},
<...>
{
"currency_code": "USD",
"currency_format": "1,234,567.89",
"currency_id": "777524000000000097",
"currency_name": "USD- US Dollar",
"currency_symbol": "$",
"effective_date": "",
"exchange_rate": 0,
"is_base_currency": true,
"price_precision": 2
},
<...>
]
The base currency has the "is_base_currency": true mark.
The same list through the user interface:
