Amazon has cut Meta’s Muse agent off from shopping on Amazon.com, after asking Meta to leave the site out of the agent’s reach and getting nowhere. People who pointed Muse at Amazon from the morning of 21 September were met with a popup reading "Continued access by an unauthorized AI agent violates Amazon’s Conditions of Use, to which our customers have agreed", according to GeekWire and Adweek. Neither company has published anything about the block, which exists as a spokesperson statement and a message inside the product.
Amazon’s objection is consent rather than capability. "We think it’s fairly straightforward that third-party applications that offer to make purchases on behalf of customers from other businesses should operate openly and respect service provider decisions about whether or not to participate," an Amazon spokesperson said. Amazon says Meta never told it that Muse would reach the store, that the agent does not identify itself while browsing, and that it appears to capture and store customer credentials and scrape account data. Because the agent is unidentified, Amazon argues, an undisclosed third party is moving through customer accounts and processing transactions without its knowledge. It adds that an agent shopping for someone bypasses the personalisation in its store, so the customer misses recommendations shaped by their own history.
Meta’s Account of How Muse Works
Meta’s own launch materials answer part of that. In its Muse launch post, Meta says the agent runs on a dedicated virtual machine that also stores the credentials for any service a person connects, that Muse "has no visibility into people’s passwords or payment methods", and that a separate Sentinel agent has to approve anything Muse sends to the internet. The agent opens its own browser and fills in forms, which is the behaviour Amazon is now refusing. Meta did not respond to requests for comment on the block.
The two companies are partners as well as opponents. Amazon products have been purchasable inside Facebook and Instagram since 2023, and Meta signed a multibillion-dollar deal in April to run agentic AI workloads on Amazon’s Graviton chips. Amazon said on 21 September that it is in direct conversation with Meta, and declined to say whether it would take legal action.
The Legal Ground Moved in August
Amazon has spent the past year keeping outside agents off its site, suing Perplexity over its Comet browser and moving against shopping agents from Google and OpenAI. Its strongest argument has weakened. Adweek reports that Amazon won a preliminary injunction against Perplexity in March, lost it on 4 August when the Ninth Circuit ruled that the user rather than the AI company is the party accessing Amazon’s computers under federal anti-hacking law, and was denied a rehearing on 10 September. That ruling left contract claims standing, which is why the Muse popup cites Conditions of Use and says nothing about hacking.
Amazon runs its own agents on the other side of the same line. It launched Alexa for Shopping in May and put purchasing inside Alexa conversations in June, and its Buy for Me feature shops external brand sites while identifying itself and letting brands opt out. The four conditions Amazon has published for outside agents follow from that: operate transparently, provide a way to opt out, offer a mutual value exchange, and improve the customer experience, a position the company says applies consistently across all operators.
Two Storefronts, Two Answers
Shopify went the other way this month. On 23 September it emerged that Shopify will let Muse complete purchases in its merchants’ stores through Shop Pay, with merchant products reaching Meta by default. One platform sells access to merchants and gains from every extra buying surface. The other sells attention against its own pages, and earned more than $68 billion in advertising revenue last year from shoppers browsing them.
For marketers the practical change is that agent reach is now a per-platform commercial term, not a property of the agent. A product feed can sit inside an agent’s answer on one storefront and be unreachable on another, for reasons that have nothing to do with the product. Muse itself has scale behind it, having become the top free iPhone app in the United States a week after its 8 September launch, which is what makes a retailer’s refusal a commercial decision rather than a technical footnote.
Recap
What has Amazon done to Meta’s Muse agent?
Amazon has stopped Muse from shopping on Amazon.com on a customer’s behalf, after asking Meta to leave the site out of the agent’s experience. People who used Muse to shop there from the morning of 21 September were shown a popup saying continued access by an unauthorized AI agent violates Amazon’s Conditions of Use. Neither company has published an announcement about the block.
Why does Amazon object to an agent its own customer authorised?
Amazon says it never agreed to any of it. Meta did not tell Amazon that Muse would reach the store, the agent does not identify itself while browsing, and Amazon says it appears to capture and store customer credentials and scrape account data. Amazon has set out four conditions for any outside agent: operate transparently, provide a way to opt out, offer a mutual value exchange, and improve the customer experience.
What does the block change for brands and marketers?
Agent access is becoming a commercial question rather than a technical one. The same agent is being shut out of one storefront while another opens its checkout to it, so brands selling across several platforms cannot assume an agent reaches their products everywhere. Amazon also earned more than $68 billion in advertising revenue last year from shoppers browsing its pages, which is the interest an unidentified agent walks past.