Fixer.io is an API that returns foreign exchange rates based on daily and historical feeds from the European Central Bank. These foreign exchange reference rates are generally updated by 3pm Central European Time. The API quotes rates against the Euro by default, but users can request quotes made against a different currency.
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The fixer.io SDK is a client to fetch currency conversion rates written in Node.js. It is a JSON API for current and historical foreign exchange rates published by the European Central Bank. It allows you to Get historical rates, Request specific exchange rates, Get the latest foreign exchange and more.