restful / SOAP inbound message capture

Hi experts,

  I was wondering if there's a way to see the incoming SOAP/restful messages on SM side... There's extaccess and I know you can define fields and stuff but is there a way to somehow capture the original incoming payload? ...which is an XML structure or a JSON string? Can I do that? Some local variable, some RAD or anything that gets me to the original payload. As far as I know with debughttp you do see the message in the logs, but I'd need them instantly upon arrival...

Thanks in advance!