The agentic commerce stack just locked in.
Four open protocols. Each ratified by serious infrastructure in the same window:
- MCP (Anthropic) — agents calling tools
- A2A (Google) — agents talking to agents
- UCP (Google Shopify) — agents transacting with merchants
- AP2 (Google) — agents paying under bounded authority
The endorsers tell the whole story. On the payments side: Visa, Mastercard, Amex, Stripe, Adyen. On the merchant side: Walmart, Target, Home Depot, Macy's, Best Buy, Etsy, Wayfair. The two sides of the commerce balance sheet ratified the same standard inside a single news cycle.
Two things follow.
First, protocols stop being a differentiator. They become infrastructure, the way REST stopped being a differentiator around 2010. The retailer who ships UCP and AP2 cleanly gets parity with the rest of the market. Nothing more.
Second, the competitive rent moves up the stack. The retailer who knows what to do with the agentic transaction once it lands — which customer to recognize across surfaces, which reward to fire at the moment of payment, which signal to capture about an agent-driven purchase that a human never sees — wins the next decade of margin per customer.
Every agentic purchase is a customer telling you exactly what they want, what they decided to spend, and what their bounded authority is. That's the cleanest behavioral signal in the history of commerce.
Most retailers are about to receive it and throw it away.
That gap is the next category split.