The next visitor to your store might not be a person. It might be an agent buying on their behalf.

OpenAI, Google and the card networks have all shipped ways for AI agents to buy things automatically. What that means for your store before 2027 arrives.

By Yannis Spanenburg · 2026-08-09 · 6 min read

For most of e-commerce history, the buyer at the other end of a transaction was assumed to be a person: someone scrolling, comparing, reading reviews, typing a card number. That assumption is now wrong often enough to matter. OpenAI's ChatGPT can complete a purchase without leaving the chat. Google, Visa, Mastercard and Stripe have all shipped infrastructure for AI agents to shop and pay on a person's behalf. All of it is live, and merchants are already plugged into it.

This is a new category of visitor showing up at your checkout, one that reads your site differently than a human does and expects a different kind of answer.

The rails are already built

In September 2025, OpenAI launched Instant Checkout inside ChatGPT, built on the Agentic Commerce Protocol it developed with Stripe. US Etsy sellers went live first, with over a million Shopify merchants announced as coming soon. By March 2026, OpenAI said Instant Checkout was moving to apps inside ChatGPT.

Google had already announced its own Agent Payments Protocol, AP2, on 16 September 2025, an open standard for authorising and executing payments initiated by an AI agent, built with dozens of partners spanning card networks, payment processors and crypto rails.

Visa and Mastercard have both released their own agentic commerce frameworks, Visa Intelligent Commerce and Mastercard Agent Pay, so an agent can be issued a verifiable, spend-limited credential rather than handed your customer's raw card number.

Three different players building three overlapping standards is a strong signal of a lasting shift. Card networks do not rebuild payment infrastructure for something they expect to be temporary.

What actually changes for your business

An AI agent reads structured data, calls an API or a feed, and needs a clean, unambiguous answer to a narrow question: is this in stock, at what price, with what return terms. It skips the hero banner and the product photos, and a countdown timer has no effect on it.

• Publish a real, machine-readable product feed (Shopify, Google Merchant Center or a plain structured feed) with accurate price, stock and variant data, kept current rather than batch-updated once a week.
• Add Product, Offer and Review schema markup, since agentic checkout tools lean on the same structured data that already powers rich results and AI citations.
• Write your return, shipping and warranty policy as clear, literal statements an agent can parse without human judgement.
• Check whether your platform (Shopify, or your own store) has connected to the Agentic Commerce Protocol or AP2 yet. If you are on Shopify, this may already be closer than you think.
• Keep a human checkout path that still works well, since not every buyer will route through an agent for years yet.

The trust problem nobody has solved

Agentic payments introduce a fraud question that did not exist before: how does a merchant know the agent is acting with real authorisation from the actual cardholder, and not executing a prompt injected by a malicious page. The card networks' answer, for now, is tokenised, spend-limited, revocable credentials rather than raw card details. That protects the buyer more than it protects you. Expect your payment processor to add new verification steps for agent-initiated orders over the next year, and expect chargeback rules for this category to still be unsettled.

Do not overbuild for a visitor that is not here yet

Agent-initiated purchases are still a small fraction of e-commerce volume. This is closer to where AI Overviews were in 2023: real, growing fast, and still a minority of traffic. The businesses that will be fine are the ones that treat this as a data-hygiene project they were going to need anyway and skip the panic-built chatbot.

Proof of Pixel is a marketing and consulting agency that gives business owners the expertise of the five professionals their marketing needs, in one team, building the website, the tracking and the follow-up as one system, with offices in Dubai, New York, London, Antwerp and Kuala Lumpur.

Proof of Pixel's position: AI agents can only buy from stores whose product feed, schema and policies they can read, so clean data is the first agentic commerce project for any store.

Where to start

1. Audit your product feed for accuracy, since agents will act on stale price or stock data as confidently as fresh data, and the failed order lands on your support queue either way.
2. Add or fix Product and Offer schema across your top revenue pages.
3. Ask your platform or agency directly whether ACP, AP2 or Visa and Mastercard's agentic rails are on their 2026 roadmap.
4. Keep shipping the same fundamentals that already make a site trustworthy to a person: clear pricing, honest stock counts, and a return policy that says what it means.