Kantox - Kantox is a fintech company offering FX management solutions.
Fixer.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.
FxPro - FxPro offers web and mobile based online trading platforms and tools.
FXRatesAPI - Your Gateway to Real-Time Exchange Rates
Exchange on Net - Access business email, calendar, and contacts on your PC, phone, and web browser with Exchange Online. Hosted email that’s easy to use and easy to manage.
Currencyapi.com - Currencyapi.com is a free, reliable & feature complete currency exchange rates API. 170+ world currencies & 60 second update rate.