No History Logging for Inbound Rest API

From IFS APP10 ( and of course IFS Cloud) , we are encouraged to use Rest API as main intergration method.

While, what supprised me is there is NO history loggin for Inbound Rest API . 

So, we don’t konw:

1. if we received a message from External System
2. what’s the inbound message content
3. what’s the API result (error ? succees)
4. what’s the detailed response we send back to External System

without information above, it is impossible to trobule-shooting any intergration issue.

So, I would like to know when R&D supposed to implement such important function?

At least , an projection - “Action” should be logged.