Hi,
If you are referring to programatically retrieving BTs already registered under associated application in controller UI, you might fine the following doc useful to retrieve data from controller UI using rest api:
https://docs.appdynamics.com/display/PRO40/Use+the+AppDynamics+REST+API
If you are referring to registering business trasnactions on application at controller UI, we confirm only requests (like Servlets, Webservice , Strutrs, spring beans) hitting the JVM/Server (say: tomcat, weblogic etc) will be sent by agent configured on the JVM where webapp received rest api requested will be registered at controller application under "Business trasanctions" screen Hope that clarifies product functionality.
We confirm you cannot directly registed a BT in controller UI without request hitting servlet/ ootb interceptors hitting the JVM with agent configured.
Regards,
Arun
