On Sunday night, Muse users trying to buy goods on Amazon began seeing a blunt warning: continued access by an unauthorized AI agent violated Amazon’s conditions of use. The message made clear that Meta’s new assistant was no longer welcome at one of the web’s biggest storefronts.¹

The block came less than two weeks after Muse launched and surged in app-store rankings. Amazon said it had not authorized Muse to access customer accounts, scrape data or process transactions, framing the dispute as one of security and user experience rather than a simple rivalry between tech giants. Its position is that third-party buying tools “should operate openly and respect service provider decisions about whether or not to participate.”²

Yet the commercial stakes are impossible to miss. Amazon has its own Alexa-based shopping ambitions, and analysts say the real question is whether an AI assistant that starts the purchase journey can displace the retailer’s grip on customer data and checkout. As one consultant put it, the fight is over who “owns origination and the customer relationship” — a question still unresolved.²

Meta’s answer has been to build an alternative network. Zuckerberg said Muse was teaming up with Shopify to make shopping and checkout easier, promising that more partnerships were coming.Mark Zuckerberg (finkd)³ He also amplified PayPal’s plan to let customers shop and check out through Muse across PayPal merchants worldwide.Mark Zuckerberg (finkd)⁴

At Meta’s Connect conference, AI chief Alexandr Wang pointed to partners including Walmart, Best Buy, Gap, Sephora and Wayfair, arguing that personal agents can help shoppers find products and deals. But privacy expert Joseph Turow warned that “People are going to be very wary,” especially when an agent handles sensitive data.⁵

For now, Amazon is betting that control matters more than convenience. Meta is betting that shoppers — and enough retailers — will decide otherwise.