FX rates: daily exchange rates for USD, EUR, ARS, BRL and 160 currencies. FX rates and currency conversion reference: daily exchange rates for up to 20 currencies against one base (USD, EUR, GBP, JPY, BRL, MXN, ARS and about 160 more) with rate, reference date and source URL from Frankfurter (central-bank data, MIT licence). Use this when an agent needs an official-style exchange rate to price, invoice or convert amounts and must cite where it came from. Daily rates, no Price: 0.001 USDC per call (x402 on Base). Without payment_signature it returns the payment requirements. Free sample: textokit_sample.