By either exposing an endpoint that others will invoke into your system or making an HttpClient call to a web service outside your system, you need to take into account the nature of RPC-style communication and the Fallacies of Distributed
transactional boundaries
A collection of 2 posts
NServiceBus Transactional Boundaries and Web Service Integrations
Over a year ago, back when my team was working on a new system we’ve been building at work, we were still in the process of “discovering” the endpoints we needed to break out as we progressed through our