Why there isn't a complete piwik api?

I have been wondering why there isn’t a complete Piwik Api attched with the Piwik Download? I’ve discoved generateDoc.bat in dir misc.but it’s hard to config and when I use the Zend to generate the Api,it told me memory exhausted style_emoticons/<#EMO_DIR#>/sad.gif .
So I will appreciate it if you send me one or tell me how to get it.
My email is: frankvictor@qq.com
or frankvictor.fl@gmail.com
Thank you! style_emoticons/<#EMO_DIR#>/rolleyes.gif

Here you go: http://dev.piwik.org/trac/wiki/API/Reference