Meta’s Muse AI shopping assistant has encountered human-verification checks at Walmart, one of its retail partners, which said the checks weren’t intended to stop the assistant, while Amazon has deliberately blocked the tool from shopping on its site, according to TechCrunch. Personal AI agents can navigate websites, fill shopping carts and book travel, but giving an agent permission to act on a user’s behalf doesn’t mean a website has agreed to deal with it; some restrictions are deliberate, while others come from security systems that can’t reliably distinguish legitimate agents from unwanted automated traffic. During JPMorgan Chase’s October earnings call, CFO Jeremy Barnum said some agents use shared login credentials and screen scraping to transfer funds, methods he described as “not secure,” and the bank blocks those methods where possible. Amazon is also battling Perplexity over its Comet AI browser, arguing the agent violates its access rules and puts customer data at risk, while Perplexity maintains users have authorized it to act; a federal appeals court vacated a preliminary injunction against Perplexity in August 2026, although the underlying dispute remains unresolved. eBay’s user agreement prohibits unauthorized buy-for-me agents unless the company grants permission, and Delta told TechCrunch it has no integration allowing third-party agents to book flights through its website, although the airline did not confirm whether it deliberately blocks specific agents. Walmart’s experience shows a blocked agent isn’t necessarily a deliberate ban: human-