Anthropic, Visa, Mastercard: how AI agents shop — and who pays

What happened

On 2 September 2026 Anthropic published open blueprints for two kinds of AI agent under the name Claude Commerce Agents. One searches a merchant's catalogue, compares products and assembles the basket; the other works in the back office and analyses sales figures, stock, prices and campaigns. Reference implementations for retail, travel, telecommunications and ticketing are included. Explicitly not included are a payment protocol, a checkout of its own and an advertising layer — those remain with the merchant and with partners. According to the reports, Shopify and Priceline are already running customer-facing agents on this basis, while Visa, Mastercard and Accenture are bringing the building blocks into their customer networks. Anthropic itself cites baskets up to 35 per cent larger and a conversion rate 60 per cent higher; those are vendor figures and have not been independently verified.

Who it affects

Online merchants in Germany and Austria currently rebuilding their shops for wallets and Wero. Payment managers who want to extend their checkout contract. And every bricks-and-mortar merchant with a secondary online business who needs to know whether the next customer is a human being or a piece of software.

Assessment

The interesting news is not the agent, it is the gap. A provider who builds a shopping AI and deliberately leaves out the till is saying: the payment process still belongs to the merchant and their partners. That is exactly the question being fought over in agentic commerce right now — whoever controls the basket ultimately controls the terms. Stripe's billion-euro purchase of OpenRouter aimed at the same spot, just from the other side.

From a payment network operator's perspective that means two things for merchants. First: anyone signing a checkout contract today should check whether it will still fit in two years, when part of the traffic comes from agents. Second: vendor figures on basket sizes are marketing until a third party has done the maths. I would not advise anyone to rebuild their shop because of a press release — but I would advise checking your own contracts for term and notice periods before the market sorts itself out.

What to do now

Take out the checkout contract and note the term, the notice period and the price adjustment clause.
Check whether your own product catalogue is machine-readable (structured data, availability, prices) — that is the precondition without which no agent will find the shop.
Ask your payment service provider in writing how it classifies agentic payments and who is liable for the authorisation in the event of a dispute.