Tipo de Cambio del Banco de Finanzas (http://www.bdfnet.com/)

npm i exchange-rates-bdf

var ExchangeRate = require('exchange-rates-bdf');
var exchangeRate = new ExchangeRate();

exchangeRate.get(function(err, result) {
  console.log(result)
});

{
  usd: {
    buy: 26.86,
    sale: 27.32
  },
  eur: {
    buy: 27.2266,
    sale: 30.8644
  }
}