National Bank of Romania API
Live official reference exchange-rate data from the National Bank of Romania (BNR), the central bank of Romania, for the leu (RON): the BNR official reference rate for every published currency (normalised to one unit), a single currency's leu-per-unit rate and inverse, a currency's reference rate on a specific past date from the BNR yearly archive, and currency conversion between any two published currencies (including RON) cross-computed through the leu.
api.oanor.com/bnr-api