🔍 Read the full analysis: Amazon Closes Its Door To AI Shopping Agents. Walmart Opens Its Own on ThorstenMeyerAI.com
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TL;DR
Amazon blocked Meta’s Muse from shopping on its site, citing concerns about unauthorized access and customer credentials. Walmart is taking a different approach, announcing an Agent Gateway and profiles with spending limits; how widely agents will be allowed to shop, and how purchases and commissions will be handled, remains unsettled.
Amazon has blocked Meta’s Muse from accessing its shopping site, while Walmart is opening an Agent Gateway for approved AI shopping agents, setting up competing approaches to automated purchasing. The split matters because it will help determine where agents can shop, how customers authorize purchases and which companies control the relationship between shoppers and retailers.
Amazon told users that continued access by an unauthorized AI agent violated its Conditions of Use. The company said Meta had not told it Muse would shop on Amazon, that the agent did not identify itself, and that it appeared to capture and store customer credentials. Meta’s launch materials disputed the credential concern, saying Muse had no visibility into users’ passwords or payment methods.
Walmart announced its Agent Gateway and Agent Profiles on October 21. The gateway is designed to let approved agents search inventory and make purchases through a structured connection, rather than navigating the retailer’s site as a person would. Walmart says profiles can set agent permissions, including spending limits.
Meta said on its October 21 earnings call that more than 10 million people in the United States and Canada had set up Muse in roughly six weeks, and that shopping was its most common use. Meta also said the average purchase was above $200. These figures are Meta’s own reported data; the company did not provide a separate measurement methodology in the source material.
Agentic shopping
Three ways an AI agent buys for you
Every fight between shops and AI agents comes down to which of these three routes the agent uses, and whether the shop agreed to it.
The browser, like a human
The agent opens pages built for people, signs in with your login and clicks through checkout. Works almost anywhere, which is why shops object: they can't tell the agent from you.
Examples: Meta's Muse (from a virtual machine in Meta's cloud), Perplexity's Comet (from your own computer)
The shop's own agent door
Approved agents search and buy through a structured interface instead of clicking through pages. The shop sets the rules.
Examples: Walmart Agent Gateway (MCP, beta), Shopify MCP server and WebMCP checkout tools
Shared protocols
Common rules for who the agent is, what you allowed, and how the checkout and payment are confirmed.
Examples: Personal Agent Protocol (draft), Universal Commerce Protocol, Agentic Commerce Protocol
The protocols competing to be the standard
| Protocol | Backers | Covers | Status |
|---|---|---|---|
| Personal Agent Protocol (Poppy) | Sierra, Meta, Walmart, Shopify, Stripe + 35 design partners | Agent identity, customer permission, one session across site, API and company agent | Draft 0.1 (9 Oct 2026) |
| Universal Commerce Protocol (UCP) | Google, Shopify; site also lists Etsy, Wayfair, Target, Walmart, Amazon, Microsoft | Discovery, cart, checkout, orders; payment mandates via AP2 | Published |
| Agentic Commerce Protocol (ACP) | OpenAI, Stripe | Checkout between agent and merchant | Open source; ChatGPT's own checkout scaled back in March 2026 |
What a careful agent purchase looks like
- You give the task and a limit, for example a $50 cap.
- The agent identifies itself to the shop and gets only the access you approved.
- It prepares the cart and shows you an approval card.
- Payment goes through a token or one-time card, so the agent never sees your card.
- The shop’s normal returns apply if the agent got it wrong.
Sources: Meta (8 Sep 2026), Walmart (21 Oct 2026), TechCrunch on Shopify (28 Sep 2026), Sierra (9 Oct 2026), ucp.dev, agenticcommerce.dev, OpenAI (24 Mar 2026). Purchase steps: Walmart’s agent terms and Meta’s Muse description.
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Retailers Set Rules for AI Buyers
The dispute goes beyond whether a bot can load a product page. Retailers want to control access to their inventories, checkout systems and customer information; AI companies want their agents to compare products and complete tasks across multiple stores. Whoever controls the agent may shape what shoppers see and where they buy, while retailers risk losing direct contact with customers.
There are also consequences for publishers and affiliate businesses. Amazon Associates commissions are tied to customers using tracked links. If an agent reads a review and completes a purchase through another route—or through a retailer’s own assistant—the original publisher may not receive a referral. The source material does not quantify how much revenue is at risk.
For shoppers, agent-based purchasing may reduce the work of comparing products, but it also puts more weight on clear authorization and payment safeguards. Walmart’s proposed profiles point to one way to set limits. The details of who handles returns, disputes and payment responsibility across different agent systems are not fully established.
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How the Shopping-Agent Split Developed
Meta introduced Muse on September 8, describing it as an agent that can use a browser, fill out forms and act for a user. It runs in a dedicated virtual machine in Meta’s cloud and uses Link by Stripe, which provides a one-time-use card, according to the source material. Amazon restricted Muse on September 20. Meta announced retail connectors, including Walmart, Best Buy, Gap, Sephora, Wayfair and Expedia, three days later.
The approaches differ. A browser-based agent can use pages built for people, but retailers may have difficulty distinguishing its activity from a customer’s. A retailer’s own agent interface offers more structured access and control. Walmart’s gateway uses the Model Context Protocol, or MCP, according to the source. Shopify has also added tools for browser agents to interact with checkout.
Companies are also developing shared standards. The Personal Agent Protocol, backed by Meta, Sierra, Walmart, Shopify and Stripe among others, was at draft version 0.1 on October 9, according to the source. Google and Shopify’s Universal Commerce Protocol and OpenAI and Stripe’s Agentic Commerce Protocol offer other approaches. Those efforts show that the technical rules for agent-led shopping are still being worked out, not that retailers have agreed to a single system.
“Continued access by an unauthorized AI agent violates Amazon’s Conditions of Use, to which our customers have agreed.”
— Amazon, in a message shown to Muse users
Access, Payments and Liability Remain Open
It is not yet clear how broadly Walmart’s gateway will be available, which outside agents will be approved, or how the retailer will apply its spending controls in practice. The source material does not establish whether Walmart’s announcement means every listed or partner agent can immediately complete purchases.
Amazon’s restriction also leaves open whether Meta and Amazon will reach an agreement or whether Muse will remain unable to shop there. Across the industry, protocols are at different stages and do not yet amount to one shared set of rules. Questions about payment disputes, returns, data access and commissions remain unresolved in the material provided.
Reported usage figures should also be treated as company claims. Meta supplied the number of Muse setups and average purchase amount, but no independent verification or detailed definition of a completed purchase was provided. Separately, cited data from HUMAN Security says 81% of agent requests went to product and search pages and 2.4% to checkout and payment in its September data; the source does not give a comparison baseline, so those figures describe observed request shares, not a measured change over time.
Watch for Agent Access Agreements
The next signs of progress will be practical: which agents connect to Walmart’s gateway, what permissions customers can set, and whether purchases can be completed reliably through the new route. Retailer announcements and protocol updates should clarify whether structured connections can offer a workable alternative to agents browsing ordinary websites.
Amazon’s position, any response from Meta, and the handling of customer credentials and payment authorization will also shape adoption. For now, the confirmed development is a visible split: Amazon is restricting Muse, while Walmart is building an entry point for approved agents. Whether shoppers and merchants adopt either model at scale remains to be seen.
Key Questions
Why did Amazon block Meta’s Muse?
Amazon said Muse was an unauthorized agent that did not identify itself and appeared to capture and store customer credentials. Meta disputed the credential concern, saying Muse could not see users’ passwords or payment methods.
What is Walmart’s Agent Gateway?
Walmart’s Agent Gateway is a structured connection intended to let approved AI agents search inventory and make purchases. Walmart also announced Agent Profiles that can set permissions, including spending limits.
Can Muse still shop at Walmart?
Meta announced Walmart as one of its retail connector partners, and Walmart later announced its gateway. The source material does not confirm the precise availability or operating status of Muse purchases through that gateway.
How could AI shopping agents affect affiliate commissions?
Some affiliate programs credit commissions when shoppers use tracked links. If an agent completes a purchase without that tracked click, the publisher that influenced the purchase may not receive a commission. The scale of any effect is not established here.
What should shoppers check before letting an agent buy?
Shoppers should check what the agent is allowed to purchase, whether a spending cap or per-purchase approval is available, how payment is authorized, and which retailer’s return policy applies. The available source material does not describe a uniform set of protections across agents.
Source: ThorstenMeyerAI.com
