Let's take a step back: what is the original requirement? And not what you imagine it is (like the GOURL thing ).

If need to embed some OBIEE content into something else there are the webservices, ADF has other ways to do it as well. Authentication would need to be done by some kind of SSO if needed, or if you use webservices you can have a technical account setup for that and store the output of the calls and deliver that via your app. Also acting as a kind of proxy to protect your OBIEE.

There just isn't a single "do this and that" answer, even the doc covers various ways when it is about integration.