Amazon Blocks Meta's Muse From Shopping on Its Site

Amazon began blocking Meta's Muse AI agent from shopping on Amazon.com the night of Sept. 20, telling users the bot violates the site's Conditions of Use.

Muse users who tried to complete a purchase saw a pop-up message instead, Engadget and GeekWire reported Sept. 21. Amazon confirmed the block directly: "Continued access by an unauthorized AI agent violates Amazon's Conditions of Use, to which our customers have agreed," the company said.

What Amazon says Muse got wrong

Amazon said Meta never told it that Muse would access the site, that the agent does not identify itself while browsing, and that it appears to capture and store customer credentials, a practice Amazon called a privacy and security risk, according to GeekWire. "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," Amazon said, adding that agents should carry the same obligations as food delivery apps and travel agencies.

Meta said Muse "has no visibility into people's passwords or payment methods." Credentials a user shares with Muse are stored so the agent can use them without seeing them itself, Engadget reported. The assistant, which Meta introduced Sept. 8, can fill out forms, send emails and make purchases with a single-use virtual card generated through Link by Stripe, according to Engadget. Neither company's public statement resolves that gap between what Amazon says Muse collects and what Meta says it can see.

The agent Amazon already beat in court, then lost

Muse is not the first shopping agent Amazon has shut out, and its most recent fight over one did not go Amazon's way. Amazon sued Perplexity over Comet, an AI browser that can shop Amazon.com on a user's behalf, and won a preliminary injunction on March 9, 2026. A Ninth Circuit panel vacated that injunction on Aug. 4, ruling that it is the user, not Perplexity, who "accesses" Amazon's computers under the Computer Fraud and Abuse Act, and comparing Comet to "an advanced software tool operating under a user's direction" rather than an independent actor, Judge Milan D. Smith Jr. wrote for the panel, according to PYMNTS. Amazon said it disagreed with the ruling and was evaluating its next steps, and the case returned to the district court.

Agent	Company	What happened
Comet browser	Perplexity	Sued by Amazon; won injunction March 9, 2026; Ninth Circuit vacated it Aug. 4
Shopping agent	Google	Blocked by Amazon
Shopping agent	OpenAI	Blocked by Amazon
Muse	Meta	Blocked starting Sept. 20, 2026

Amazon has also moved to block shopping agents from Google and OpenAI, GeekWire reported, without saying when those blocks began. Amazon has not sued Meta, and the Ninth Circuit's Aug. 4 ruling concerned only Perplexity's specific software design, not agentic shopping generally. Browser-based assistants carry their own separate exposure regardless of who wins a platform fight: AI agents built into browsers have already been shown to be hijackable by the pages they visit.

A cloud customer Amazon still needs

The standoff complicates a commercial relationship that runs in the other direction too. Meta signed a multibillion-dollar deal in April 2026 to run agentic AI workloads on Amazon's Graviton chips, GeekWire reported, and Amazon products have been purchasable inside Facebook and Instagram since 2023. Blocking Muse touches neither arrangement directly, but it puts Amazon in the position of restricting a company that pays it for cloud infrastructure while asking that same company to route agentic shopping through terms Amazon controls, a tension Google faces with its own agent-building push even as it invests in orchestration platforms for the agents it builds itself.

The fight is happening because agentic shopping has already reached scale. Roughly 132 million Americans have made a retail purchase with AI assistance, and 22% began their online research through an AI tool, according to a PYMNTS analysis. That volume is what makes Amazon's Conditions of Use a commercial lever rather than a formality, and what makes Meta's decision to keep Muse running against a direct pop-up warning, rather than pulling back, notable on its own.

Meta has not said whether it will challenge Amazon's block in court the way Perplexity did, or change how Muse identifies itself to comply with Amazon's terms instead.

Sources

1. Amazon Blocks Meta's Muse AI Assistant in New Standoff Over Agentic Shopping, GeekWire
2. Amazon Bars Meta's Muse AI From Shopping on Its Site, Engadget
3. Amazon Bars Meta's Muse AI Agent From eCommerce Marketplace, PYMNTS
4. Ninth Circuit Narrows CFAA Reach in Perplexity Agentic Commerce Ruling, PYMNTS