ExchangeRate-API
Fixer.io
Exchangeratesapi.io
Currencyapi.com
Open Exchange Rates
Currencylayer
BankExchange
xChangeApi
CodeHerald
ExchangeRate-API.com offers an easy-to-use JSON currency conversion API with unlimited free requests. The service supports all 160 major currency codes and an incredibly accessible API request format. ExchangeRate-API has been a popular option for developers to get exchange rate data since 2010!
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ExchangeRate-API
CodeHeraldFixer.io - Fixer provides a free, simple, and lightweight API for current and historical foreign exchange rates and currency conversion. The API tracks rates published daily by the European Central Bank.
Exchangeratesapi.io - Simple API for Global Currency Exchange Rates
Currencyapi.com - Currencyapi.com is a free, reliable & feature complete currency exchange rates API. 170+ world currencies & 60 second update rate.
Open Exchange Rates - Free, hourly-updated exchange rates - a simple, accurate, open-source JSON API. Free for personal use, a bargain for everybody else.
Currencylayer - Free and startup-friendly currency converter JSON API for real-time and historical exchange rates - reliable and accurate, supporting 168 world currencies.
BankExchange - Exchange rates JSON API, for historical exchange rates from 53 central banks from around the world...