Ask HN: Chat with Website Bot?

Hi. Probably the most frequent AI app out there is the Chat With {X} template, where X is usually "PDF". What I can't find is a Chat With Website service, that allows me to provide a url, and ask questions about an entire website. It would be really helpful for me when dealing with unfamiliar APIs.

Apps like Perplexity and Phind help a bit, but are too broad to provide specific answers.