UCP, ACP and AP2: Which One to Build For
Four agentic commerce specifications, doing three different jobs. What UCP, ACP, AP2 and MCP each cover, where each sits, and which one a merchant implements.
ucp
Google Is Auto-Enabling Native Checkout on Products
From 22 September 2026 Google began telling merchants their products are eligible for native checkout in AI Mode and Gemini. Inclusion is automatic, not opt-in.