About the Open Exchange Rates API
Open Exchange Rates provides a simple, lightweight and portable JSON API with live and historical foreign exchange (forex) rates for over 200 worldwide and digital currencies, via a simple and easy-to-integrate API, in JSON format. Data are tracked and blended algorithmically from multiple reliable sources, ensuring fair and unbiased consistency.
Exchange rates published through the Open Exchange Rates API are collected from multiple reliable providers, blended together and served up in JSON format for everybody to use. There are no complex queries, confusing authentication methods or long-term contracts.
End-of-day rates are available historically for all days going back to 1st January, 1999.