Amazon has cut off Meta's Muse personal AI agent from shopping on Amazon.com, escalating a fight over who controls the customer relationship when AI agents make purchases on people's behalf.
The block took effect on Sunday night, when users of the Muse assistant began seeing an error message while trying to buy goods through the agent. "Continued access by an unauthorized AI agent violates Amazon's Conditions of Use, to which our customers have agreed," the message read, as first spotted by GeekWire. TechCrunch confirmed the block on Monday morning. For more context on this story, see our ongoing AI news.
Why Amazon Says It Blocked Muse
According to GeekWire, Amazon says it attempted, unsuccessfully, to get Meta to voluntarily exclude the e-commerce giant from Muse's shopping experience before cutting the agent off. The company laid out three core complaints: Meta never told Amazon that Muse would access its store, the agent does not identify itself when it browses, and it appears to capture and store customer credentials — which Amazon argues creates privacy and security risks.
"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 in a statement.
Amazon also noted that Muse can reach account pages and order history when a customer prompts it to do so. Because the agent does not announce itself, Amazon views that as an undisclosed third party moving through customer accounts.
Meta has rejected the security framing before. The company has previously said that Muse "has no visibility into people's passwords or payment methods," and that credentials a user shares "go into secure storage, so Muse can use them without seeing them, including passwords a person types into the browser themselves." Meta did not immediately respond to a request for comment after the block went live, GeekWire reported. Amazon said on Sunday night that the two companies are in direct conversation, and it declined to say whether it would consider legal action.
The Stakes in Agentic Commerce
The standoff is bigger than a dispute between two tech giants. Agentic commerce — AI agents that browse, compare and buy on a user's behalf — threatens to reorder how the online shopping economy works. Amazon generated more than $68 billion in advertising revenue last year, a business that depends on shoppers browsing its pages and seeing sponsored products. If an agent does the shopping, the sponsored listing loses its audience.
Amazon has spent the past year working to keep outside agents off its marketplace. The company sued Perplexity over its Comet browser, and it has moved to block shopping agents from Google and OpenAI as well. Muse is simply the newest — and, by early measures, the fastest-growing — entrant to run into that wall.
An Awkward Breakup Between Partners
What makes the clash especially pointed is how entangled the two companies remain. 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. Meta's promotional materials for Muse show the agent comparing strollers and asking for a user's approval before placing an order — the kind of everyday shopping Amazon dominates.
Why the Block Matters for Muse's Momentum
The ban lands at a sensitive moment for Meta. Muse is off to a record-setting start. According to estimates from market intelligence firm Apptopia reported by TechCrunch, Muse's mobile app has been downloaded more times in its first 12 days than ChatGPT was in the 12 days after its debut: 1.8 million downloads in the U.S. and Canada on iOS alone, compared with ChatGPT's 1.3 million in the same window. Globally, Apptopia estimates 2.8 million installs in the app's first 12 days.
Engagement looks strong too. Muse's U.S. daily active users stand at an estimated 642,000, versus 231,000 for ChatGPT at the equivalent point after its launch. The app has climbed from No. 2 to No. 1 on the U.S. App Store since launching. Apptopia also found that more than 95 percent of Muse users are Facebook users and 63 percent are Instagram users — evidence of Meta's powerful cross-promotion engine. All of those figures are third-party estimates; Meta has not published its own numbers.
That popularity is precisely what makes the Amazon block consequential. A shopping agent that cannot shop at the largest online retailer loses a meaningful share of its usefulness, and Meta now faces the task of negotiating access or steering Muse users to retailers that welcome agents.
What Happens Next
The two companies are talking, according to Amazon, and the conversation will help define the rules of agent-driven commerce: whether agents must identify themselves, how customer credentials should be handled, and whether platforms hold an absolute veto over automated buyers. Regulators and rival platforms are watching closely, because similar fights are coming to every corner of e-commerce.
For now, Muse users who want something from Amazon will have to do it the old-fashioned way — by browsing and checking out themselves.
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