There's a reference implementation of an API client included in SCI 1.4
It is located in /opt/ruckuswireless/sci/scripts/oss-api.php and you can simply run it to pull data, and even upload it to some remote FTP server.
Note: The API is for SCI's canned reports, not Custom Reports ("Analyzer Report"). Custom reports are essentially a GUI that translates dragging of fields on the screen to dynamic SQL queries - the API is thus SQL in that case, and you can simply query the DB directly, the same way the Analyzer Tool does.