The Adaptation Timeline
What has actually shipped in agentic commerce, what has not, and where a merchant stands today. Every milestone is dated and sourced. Last reviewed 2 October 2026.
The Protocols Are Published
OpenAI and Stripe open-source the Agentic Commerce Protocol (ACP). Google announces the Universal Commerce Protocol (UCP) at NRF with Shopify, Etsy, Wayfair, Target and Walmart. The standards for agent checkout exist on paper.
First Contact With Reality
OpenAI scales back in-chat Instant Checkout and routes buyers to merchant sites instead. Shopify switches on Agentic Storefronts for US merchants. Google hands the AP2 payments protocol to the FIDO Alliance.
Discovery Moves Faster Than Checkout
AI assistants send more shoppers to retail sites, and those visitors convert better than average. Buying inside the assistant stays rare. Being found, read and cited by AI matters now; agent checkout mostly does not yet.
Checkout Is Still US-First
Google's UCP checkout is rolling out to US merchants only, with Australia and Canada next and no UK date. Adobe Commerce has committed to UCP and ACP but not shipped them natively. For a UK merchant, the work that pays today is product data, AI visibility and measurement.
The Questions That Decide It
Does agent checkout reach the UK, and on whose rails? Do platforms below Shopify ship native support? Do assistants keep sending traffic to merchants, or keep the purchase for themselves? We track the evidence here as it lands, not the forecasts.