Open Exchange Rates API: Add Real-Time Data for 161 World Currencies into Any Application

Janet Wagner, Contributing Writer
Jan. 30 2013, 11:20AM EST

The Open Exchange Rates API currently provides real-time, hourly-updated exchange rates and historical data for 161 world currencies that can be used in web and mobile applications, frameworks and with any programming language.

Open Exchange Rates API - JSON Data

In addition to providing real-time currency exchange rates, the Open Exchange Rates API provides historical exchange rates data dating back to 1999. API responses are returned in JSON (JSONP support is also available) and all API calls must include an App ID which is provided after signing up for an account.

Per the official website, some of the features the Open Exchange Rates API offers include:

  • Hourly-updated exchange rates
  • Easy to access and integrate
  • Supports JSON, JSONP and HTTPS
  • Historical data back to 1999
  • Code is open-source
  • For use in any application, framework or programming language.


Applications currently using the Open Exchange Rates API are showcased on the API site and include WooCommerce Currency Converter, Calculator², iGotCharts + Units & Currency Converter, and Currency Exchange Fee Calculator.

Developers interested in using the Open Exchange Rates API can find more information in the API documentation and FAQ.

Janet Wagner is a data journalist and full stack developer based in Toledo, Ohio. Her focus revolves around APIs, data visualization, machine learning, and data-driven journalism. Follow her on Twitter: @webcodepro, Google+, or send her an email.