Abstract: There is provided a method for, an apparatus for, and a computer program for a second network repository function for causing an apparatus of the second network repository function to when operating in a second domain: signal an indication to a first network repository function operating in a first domain, the indication indicating whether at least one network entity in the second domain is capable of performing discovery and/or selection of a network function instance in the second domain on behalf of a network entity located in the first domain.

Abstract: Embodiments of the present disclosure relate to methods, apparatuses and computer readable storage media for indirect communication. In example embodiments, a method is provided. The method comprises receiving, at a second service communication proxy (SCP), a service request and an access token from a first SCP, the service request originating from a first network function (NF) for requesting a service from a second NF and comprising a header indicating scope information about the requested service; verifying the access token based on the header of the service request; and in response to the verification of the access token succeeding, transmitting the service request to the second NF without transmitting the access token to the second NF. As such, the verification of the access token is offloaded from the second NF to the SCPp, thereby reducing the overhead on the second NF.