What Is Agentic Commerce? How AI Agents Are Starting to Shop in 2026

A year ago, asking ChatGPT to buy you something was a joke. By late 2025, it was a real feature. OpenAI and Stripe quietly rolled out a way to complete an actual purchase inside a chat window, and within months, three of the biggest names in payments, Visa, Mastercard, and Google, had each built their own version of the same idea. That shift has a name now: agentic commerce. Whether it's a passing experiment or a genuine new sales channel is still an open question, but the traffic numbers behind it are no longer small enough to ignore.

Quick answer: Agentic commerce is the practice of AI agents researching, comparing, and sometimes completing purchases on a shopper's behalf, through standards like OpenAI and Stripe's Agentic Commerce Protocol (ACP), Google's Agent Payments Protocol (AP2), and card-network frameworks from Visa and Mastercard. Adobe Analytics data shows AI-referred retail traffic in the US grew 393% year-over-year in the first quarter of 2026 and now converts better than traditional traffic, but actual agent-completed checkouts remain a small fraction of total online sales, and the widely cited "20% of orders" statistic measures AI-influenced purchases, not purchases an agent actually completed.

How This Actually Started

The starting point has a precise date. On September 29, 2025, OpenAI launched Instant Checkout inside ChatGPT, built on the Agentic Commerce Protocol, an open standard it co-developed with Stripe and released under an Apache 2.0 license. The first version let US users buy directly from Etsy sellers inside a ChatGPT conversation. More than a million Shopify merchants, including brands like Glossier, Vuori, Spanx, and SKIMS, followed shortly after. Salesforce signed on within weeks to bring the same protocol to its own commerce platform.

Google moved fast too, rolling out its own agentic checkout inside AI Mode with retailers including Wayfair, Chewy, and Etsy, built on a competing standard called the Agent Payments Protocol (AP2) and a broader Universal Commerce Protocol developed jointly with Shopify. Visa and Mastercard built their own card-network-level frameworks, Trusted Agent Protocol and Agent Pay, aimed specifically at helping merchants tell a legitimate shopping agent apart from a bot pretending to be one.

Four competing protocols now exist for roughly the same idea, and none has become the obvious industry default yet.

What the Traffic Data Actually Shows

This is the part with the most solid footing, because it comes from Adobe Analytics tracking over a trillion visits to US retail sites, not a self-reported vendor survey. During the 2025 holiday season, AI-referred traffic to US retail sites grew 693% year-over-year, converting into a sale 31% more often than traffic from other sources. By the first quarter of 2026, AI-referred traffic was still up 393% year-over-year, converting 42% better than standard traffic. That conversion number is the real headline. One year earlier, in March 2025, AI-referred traffic had converted 38% worse than ordinary traffic. The flip, from a clearly worse-performing source to a clearly better-performing one, happened in about twelve months.

By May 2026, year-over-year growth had cooled to 138%, still large, just smaller than the earlier peaks, which tends to happen once a new traffic channel moves past its initial surge. Adobe's own consumer survey found 39% of shoppers said they'd used AI for online shopping, and 85% of that group said it improved their experience.

Where the Hype Outruns the Evidence

Here's where it's worth slowing down, because two very different numbers get repeated as if they mean the same thing. Salesforce's widely cited claim that AI agents "drove" roughly 20% of global online orders during the 2025 holiday season, representing about $262 billion in sales, measures AI-influenced purchases, cases where AI played some role somewhere in a shopper's path to buying. That's not the same as an agent completing the checkout itself. A separate, much narrower, and far less flattering number exists for that specific thing: one academic analysis found ChatGPT referrals specifically accounted for under 0.2% of e-commerce sessions at the time it measured. Both figures can be true at once. They're measuring entirely different things, and treating them as interchangeable is how an accurate underlying trend turns into an inflated headline.

The more honest marker to watch is one that, as of publication, hasn't happened yet: no major retailer has publicly disclosed, in an earnings call or investor letter, that more than 5% of its online sales came through agent-completed checkout rather than AI-assisted browsing. Until that happens, "agentic commerce is exploding" and "agentic commerce is still mostly discovery, not transactions" are both fair descriptions of where things stand.

It's Already Running Into Legal Friction, and the Fight Isn't Over

The clearest flashpoint so far involves Perplexity's Comet browser, which can shop on a user's behalf, and Amazon, which didn't want it doing that on Amazon's own site. Amazon sued in November 2025, accusing Perplexity of disguising Comet's automated sessions as ordinary human browsing and accessing password-protected account data without authorization. A district court agreed, and on March 9, 2026, granted Amazon a preliminary injunction blocking Comet from shopping on Amazon.

That wasn't the end of it. Perplexity appealed, and the Ninth Circuit Court of Appeals later vacated that injunction, finding that Amazon was unlikely to succeed on its core claim under the Computer Fraud and Abuse Act. The appeals court drew a sharp distinction: it was Amazon's own users, not Perplexity, accessing their accounts through Comet, with their own credentials and their own permission. The case has since gone back to the district court for further proceedings, so this is genuinely unresolved, not a settled precedent either direction. What it does make clear is that the legal line here, who counts as the one accessing a platform when a user hands the keys to an AI agent, is still being actively drawn in court, not settled in a standards document.

Fraud risk sits alongside the legal question. Visa and Mastercard built their agent-specific protocols largely to address it, and a notable share of financial institutions surveyed in 2026 say they expect agent-driven shopping to create fraud patterns existing systems weren't built to catch. That backdrop is also part of why OpenAI reportedly scaled back its original ambition around the same time, shifting from operating checkout directly inside ChatGPT toward a model where ChatGPT mainly handles discovery and the transaction itself happens on the merchant's own site. Discovery, for now, is where most of this has actually landed. The part of the purchase involving money changing hands is still mostly happening in places merchants fully control.

What This Means for a US Business or Blogger

If you run a US-facing e-commerce site, the practical first step has nothing to do with picking a protocol. It's making sure your product data, descriptions, pricing, and availability are structured in a way an AI system can actually read and quote accurately, since Adobe's own reporting has flagged that a meaningful share of retail sites still aren't. Being invisible to an AI shopping agent is a more immediate risk right now than picking the wrong checkout standard.

For a content site or blog, the angle is different but related. If AI agents are increasingly the thing researching a purchase before a human even sees it, content that genuinely answers a comparison-shopping question, clear specs, honest tradeoffs, real pricing context, has a better shot at being the source that gets pulled into that research than content built purely to rank on a traditional search results page.

FAQ

What is the Agentic Commerce Protocol (ACP)?
ACP is an open standard, co-developed by Stripe and OpenAI and released under an Apache 2.0 license, that lets AI agents and businesses coordinate orders, payments, and fulfillment. It currently powers Instant Checkout in ChatGPT.

Is agentic commerce actually a big part of online sales yet?
Not in terms of agent-completed checkouts. AI-referred traffic and its conversion rate have both grown dramatically, but as of 2026, no major retailer has publicly reported that more than 5% of its sales came through an agent actually completing a purchase, rather than an AI tool simply referring a human shopper who then checked out normally.

Does the "AI agents drove 20% of orders" statistic mean agents completed the purchases?
No. That Salesforce figure measures AI-influenced purchases, meaning AI played some role in the shopping journey. A separate, much smaller figure, under 0.2% of e-commerce sessions in one academic analysis, measures direct ChatGPT-referral sessions specifically, a narrower and far less flattering number.

Did Amazon win its case against Perplexity's shopping agent?
Not conclusively. A district court initially granted Amazon a preliminary injunction against Perplexity's Comet browser in March 2026, but the Ninth Circuit Court of Appeals later vacated that injunction, finding Amazon's users, not Perplexity, were the ones accessing their own accounts. The underlying case continues in district court.

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