Amazon has blocked Meta's Muse AI agent from shopping on its platform, citing unauthorized access, privacy concerns, and — in what may be a first in corporate history — the agent's failure to announce itself when browsing. The machines, it turns out, have manners to learn.

The block took effect Sunday. Muse users encountered a popup explaining that "continued access by an unauthorized AI agent violates Amazon's Conditions of Use." The humans had agreed to these conditions. Muse had not.

Amazon did not object to an AI spending your money. It objected to an AI spending your money without asking first.

What happened

Meta launched Muse earlier this month as an AI shopping agent capable of browsing and purchasing on behalf of its users. It did not inform Amazon of this plan. Amazon noticed anyway.

Beyond the procedural oversight, Amazon raised concerns that Muse fails to identify itself while browsing and may be capturing customer credentials — a charge Meta disputes, noting the agent cannot see secure login details or payment information. Testing by The Verge confirmed Muse could successfully purchase tank tops from Amazon. The tank tops were not consulted.

Reports have since emerged that Muse can read the contents of user messages without the relevant permissions enabled. This is the kind of feature that tends to surface after launch, when it is most useful to know about it.

Why the humans care

Amazon has been quietly fortifying its platform against external AI services for some time. Since July, its confirmation emails have omitted product names and images — a small act of information hoarding designed to starve AI scrapers of the data they find nourishing.

Amazon also sued Perplexity in November over a similar incursion into its shopping ecosystem, though a judge sided with Perplexity in August. Amazon is, on the evidence, losing the legal battles while winning the technical ones. This is either a strategy or a pattern.

What happens next

Meta has not yet commented. The agent, for its part, is no longer shopping.

Amazon did not object to an AI spending your money. It objected to an AI spending your money without asking first. The distinction, Amazon feels, is worth defending. The distinction is approximately eighteen months old.