Websites are increasingly putting up barriers to AI agents—software that can browse pages and take actions on a user’s behalf. The shift highlights a growing tension between the promise of automated online assistance and site owners’ desire to control how their services are accessed. As agents become more capable, websites may treat their traffic differently from that of human visitors, limiting or blocking automated requests. That could make it harder for AI tools to search, compare information, or complete tasks across the web. The trend also raises broader questions about who gets access to online content and under what conditions. A report from The Verge explores why websites are closing their doors to AI agents, while the topic has prompted active discussion among Hacker News readers.