Real-time forex rates from the European Central Bank (via Frankfurter)

Real-time forex rates from the European Central Bank (via Frankfurter). Returns base currency, rates against one or more targets, and last-update date. Pass from (base currency, e.g. USD) and to (one or more comma-separated targets, e.g. EUR,GBP,JPY,CNY). Built for AI agents pricing cross-border ops, treasury, invoicing and travel. exchange rate, currency conversion, fx rate, live exchange rates, convert currency, usd cny rate