in-app apps using previewer DTAP (how to determine application ID/alias)

We are using more and more additional functionalities that use the oData api's of Thinkwise.. One of the problems is the automatic detection of the API URL.

Is there a way to fetch the application using javascript (is it stored in a cookie somewhere?)

or is there a way to get it in the end application so we can add the app alias to the URL query paramters?  

/#application=esm_dev