The service provides exchange rates for many currencies worldwide, allowing applications to convert amounts for transactions and to assess risk of changes in exchange rates over time. It is available as a widget to be embedded in HTML pages or as a web service with SOAP API.
API methods support retrieval of a foreign exchange rate for any pair of currencies by multiplying a "currency factor" by one currency value to determine the other value. Methods also support listing of datasets providing currency factors, providers of datasets, and timestamps of the datasets, which allows evaluation of data reliability.
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So far, we don't have a record of any changes to this API