Open Source Exchange Rates API - free, hourly-updated JSON currency datafree, open source exchange rates and currency conversion JSON API, updated hourly, no rate limits.open source Exchange Rates No access fees, no rate limits, no ugly XML - just free, hourly updated exchange rates in JSON format The Open Source Exchange Rates API project was designed to address a glaring problem with exchange rate data on the internet: there's an untold number of free currency conve
