David - did you find a way to get this to a project screen rather than a viz?  I have raised this question internally but I have not found a way to do this yet. 

Patrick

Good morning David.

I haven't played around with getting a certain Site since mine just uses Default.  To get to a certain Project though, all you have to do is https://{server}/trusted/{token}/#/projects/{projectNumber}/workbooks.  The {projectNumber} you can get just by going into Project normally, and you'll see in the URL an integer value for the project.  I'm assuming you can do the same with directing to another Site.  Just need the id of the Site.  For some reason, the API returns guid values but in the URL they use integer id's.  To test, I just logged into my site and grabbed everything past the server name and pasted this in after the trust token.

Hope this helps.