The AI Server Assistant page is a demo of the agents Broadbent AI builds. It is not a one-size product. You can try the demo, then ask for an agent designed around your systems. It takes a request in plain language, analyses it, and asks you to review an action before it runs.
Broadbent AI Chat is the separate chat product at chat.broadbent.ai. It uses the Broadbent AI model on Broadbent infrastructure. Credits for Chat, the assistant work, App Builder, and sFTP Client come from one pool.