Sharing Your AI Newsletter Creator with Clients: A Guide

I've created my AI Agent that is a Newsletter Creator for a specific niche. I want to deploy this as part of my toolset that I offer clients. I realize that I need to upgrade to Pro or Business first, but how do I share my agent with clients so that they have their own "workspace"? Or this even possible? I will have a paywall for them to get access. I would like to see what they see before making the subscription commitment.