AI agents have a big problem: Nobody wants to let them in

United Airlines has moved to block unauthorized third-party personal AI agents from its digital platforms and via travel agencies and aggregators, citing risks of exposed credentials, unintended purchases, and FAA/DOT compliance issues. It joins Bank of America, which warned customers against sharing credentials with AI tools, and JPMorgan Chase, Charles Schwab and Citigroup, which have banned such agents, while Amazon, Yelp, The RealReal and eBay have also restricted them. The reasons range from protecting customer finances to preventing agents from disrupting other shoppers and favoring companies' own assistants.