AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
Agentic commerce needs a capability-negotiation layer, not a fixed API: UCP has merchants declare what they support and agents negotiate down to what they can handle, a pattern worth studying for any AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition →-to-service protocol.
