One feature that highlights the enterprise grade of Oracle BI (OBIEE) Server is the ability to not only interact with the web interface but also to use the Application program Interface (API) to automate certain tasks.
Oracle BI provides a list of API Methods which can be invoked using SOAP. The List of available methods can be viewed using the following URL within your installation:
The methods available as API are also documented in the official Bookshelf: https://docs.oracle.com/cd/E28280_01/bi.1111/e16364/methods.htm#BIEIT180
and here: https://docs.oracle.com/cd/E12096_01/books/AnyWebServ/AnyWebServ_Overview3.html
Some more Marketing specific WebServices are described here: