National Bank of Kazakhstan API
Live official exchange-rate data from the National Bank of the Republic of Kazakhstan (NBK), the central bank of Kazakhstan, for the tenge (KZT) — each rate with its direction (rose or fell) and the day's change: the NBK official rate for every published currency (normalised to one unit) with the day's change and direction, a single currency's tenge-per-unit rate and inverse plus change, a currency's official rate on a specific past date, and currency conversion between any two published currencies (including KZT) cross-computed through the tenge.
api.oanor.com/nbk-api