Amazon blocks Meta's Muse AI agent from shopping on its store

Amazon cuts Muse off

Amazon has blocked Muse, Meta's AI agent, from shopping on its site on behalf of users. According to The Verge, which cites the original report from GeekWire, the shutdown surfaced on Sunday when Muse users began seeing a warning stating that continued access by an AI agent Amazon has not authorized would violate the Conditions of Use its customers have agreed to.

Muse is a new product: Meta launched it earlier in September, and The Verge's testing at launch showed it could complete a genuine purchase on Amazon, buying tank tops while other items sat in the cart. The capability being switched off was working in practice rather than theoretical.

What Amazon says went wrong

GeekWire reports that Meta never told Amazon in advance that Muse would operate against its store. Amazon's stated concerns center on identification and credentials: the agent does not announce itself as automated while browsing, and it appeared to be capturing customer login details.

An unnamed Amazon spokesperson told GeekWire that the company believes third-party applications offering to buy things for customers from other businesses should work openly and respect the decision of the service being accessed about whether to participate. The Verge says it reached out to Meta for comment.

Muse's shaky start

When Meta introduced Muse, it said the agent cannot see secure login details or card payment information. Privacy worries have surfaced regardless, with reports noted by The Verge that Muse can read the contents of user messages even when the permission required for that access has not been enabled.

Not Amazon's first move

The block continues a campaign by Amazon to keep rival AI services from standing between it and its customers. The company sued Perplexity last November in an attempt to keep its platform out of the AI search provider's Comet shopping experience; a judge sided with Perplexity in August. Since July, Amazon's order confirmation emails have also grown noticeably bare, omitting specific item names and product images so that external AI services have less data to mine.

Why it matters

Agentic commerce only works if AI systems can act across the web on a user's behalf, and this episode shows the largest online retailer is prepared to say no. Amazon's argument, that intermediaries should identify themselves and accept a platform's decision about participating, is a plausible baseline rule, but it also hands incumbent platforms a veto over a new class of competitors. Having already lost one court fight with Perplexity, terms-of-service enforcement may prove a more effective tool for Amazon than litigation.

For Meta, the block undercuts Muse's core shopping pitch weeks after launch, and the reported credential capture and message-reading issues feed a broader question about how much visibility users actually have into agents acting in their name. The likely next battleground is a set of identification protocols and negotiated access deals for AI agents, replacing the open, self-serve access Muse assumed it would have.