It would be great if we could have the possibility to log HTTP request / response for api-gateway outoubnd HTTP calls.

Inbound HTTP calls for the api-gateway can already be logged using the RequestDumpHandler for Undertow, but this is not the case for outbound HTTP calls originating from the api-gateway.

Perhaps it is possible to implement this as a plugin, but then it becomes part of the service and it cannot be switched off.
Preferrably it is an option that can be switched on/off via a system property or via the Apiman GUI.

The headers of the HTTP request / response are the most important part to log.