You can use the Yandex.Direct API to create applications for managing advertising campaigns, such as automating routine operations, using your own bid management algorithms, downloading statistics, and completing many other tasks.
Account access may be suspended for advertisers using Yandex units who haven't made payments for over a year (calling API methods results in the error 54). To continue using the API, you need to switch your account to a payment currency. More details
In statistics provided by the GetBannersStat (Live) and CreateNewReport (Live) methods, the time range of available data has changed for an ad's average position and the device type. Data is now available beginning from November 1, 2014.