Is http monitoring agent in netdata measure all requests and responses in real time ?

So I have 17 api services connected with an iOS app now my question is, can netdata agent successfully measures the incoming request and responses between app and the api services.

Also how http agent works internally in the netdata agent Before I am in a confusion that netdata agent mocks the api endpoint call, not measuring the actual request and responses between app and service.

Can anyone clarify my confusion?