National Bank of Ukraine API
Live official exchange-rate data from the National Bank of Ukraine (NBU), the central bank of Ukraine, for the hryvnia (UAH): the NBU official daily rate for every one of 45-plus currencies, a single currency's rate (hryvnia-per-unit and inverse), the daily time series of a currency's official rate over a date range and currency conversion between any two currencies (including UAH) cross-computed through the hryvnia at NBU rates.
api.oanor.com/nbu-api