The University of Auckland This document describes how the GeneRic Autonomic Signaling Protocol (GRASP) defined by RFC 8990 may be used as a rendezvous mechanism for one Autonomic Service Agent to find another, and then to establish a generic communication channel between them. Such a channel could be used for any form of agent-to-agent communication, not limited to GRASP exchanges. This document updates RFC 8990 by adding a transport identifier registry.