Amazon Blocks Meta's AI Shopping Assistant From Buying on Its Site

Amazon has cut off Meta's new AI assistant, Muse, from shopping on Amazon.com. Muse is an "AI agent" — software that can take actions for you, like browsing websites, filling out forms, and buying things. Starting Sunday, Sept. 20, people who tried to use Muse to order from Amazon hit a warning saying an unauthorized AI agent breaks Amazon's rules of use. Amazon says Meta never told it Muse would be shopping there.

Amazon's complaint isn't really about one purchase. It says Muse doesn't announce itself as a robot while browsing, and it can see customer account details when acting for you. Amazon also worries about how passwords are handled. Meta pushes back indirectly: its security paperwork says Muse can't see your passwords or card numbers because they sit in locked storage, and a second AI called Sentinel checks Muse's actions before they go live. You also have to approve sensitive steps like buying.

The bigger fight is about control. Amazon already sued Perplexity over its Comet browser assistant and briefly won a court order blocking it — though an appeals court threw that out on Aug. 4, saying the shopper, not Perplexity, was the one accessing Amazon. Meanwhile, Shopify is going the other way, adding Meta as a shopping channel and supporting Muse payments through Shop Pay. Retailers are deciding: do AI assistants bring customers, or steal the relationship?

For you, the lesson is simple. AI assistants that shop for you are only as reliable as the websites that let them in. Access can vanish overnight, with no warning and no technical fix. So if you hand a big purchase or work order to an AI agent, keep a backup plan — and expect more of these standoffs as bots become regular shoppers.