GeekWire first reported in September that people trying to use Muse to shop on Amazon were seeing a popup that read “continued access by an unauthorized AI agent violates Amazon’s Conditions of Use, to which our customers have agreed.”

Amazon’s conditions of use do not explicitly ban all AI agents, but the company states that “at our sole discretion, we may limit, including by technical measures, whether and how any Agent accesses, uses, and interacts with Amazon Services.”

Booking.com does not allow automated assistants to make bookings or reservations without express permission. The company’s terms say AI-powered assistants are also not allowed to access its platform for any reason without prior permission.

The company says it will block anyone it suspects of using AI-powered assistants.

eBay is shutting the door on AI shoppers.

The marketplace has recently updated its user agreement to prohibit automated access without the company’s permission, specifically naming “buy-for-me agents,” “LLM-driven bots,” and “end-to-end flow that attempts to place orders without human review.”

Resy, the restaurant booking platform, limits which AI agents are allowed to access its platforms. The company says it supports discovery and booking with ChatGPT and Claude, but it can block AI activity outside those approved services.

The company cited platform security and concerns about excessive demand on its system, and said users who violate their rules could have their accounts terminated.

Target is keeping a tighter guest list for AI shoppers.

The company’s terms prohibit AI shopping agents from accessing or gathering data from its site unless explicitly authorized. The approved list includes “Target’s AI Shopping Assistant, OAI, Google and Microsoft.”

According to the user terms, approved agents can sign in to accounts, build carts, place orders, and initiate returns with customers’ permission. Target also said in its terms that the company can change the list or restrict agents’ access at any time.

United Airlines announced Wednesday it was restricting access for third-party agents, citing security and regulatory risks, as well as the possibility of unintended purchases.

The airline said some actions, such as an agent checking in on behalf of a flyer, could violate federal regulations requiring a human to acknowledge that their bags do not contain banned items like explosives.

The company’s new policy states that unauthorized AI agents are not permitted to search, book, buy, or manage your trips on United’s platforms.

Yelp does not allow non-human traffic on its site without express permission. The company has a paid data-licensing program, which could allow an agent to access its data and take certain actions through approved integrations, including one that lets ChatGPT users make reservations.