“Headless”? What Is It and Do I Need to Go There?

**Executive summary:** This article explains the three-stage progression to "headless" agentic commerce—agents using websites (AG2UI), calling structured Model Context Protocol (MCP) endpoints (A2MCP), and full agent-to-agent interactions (A2A)—and argues organizations must prepare machine-speed endpoints and domain-based identity/trust (DNS-AID, DNSSEC, ANS) to remain competitive and secure in a future of autonomous shopping agents.