Public Page Changes with Source Evidence: Read one public HTTPS page and compare its static text with your previous snapshot. Returns added/removed lines, exact quotes for up to 5 search terms, headings, links and a reusable snapshot. Max 12,000 text characters; reports truncation. No login, JavaScript rendering or background monitoring; call again when needed. 0.01 USDC includes one public page, up to 5 terms and one caller-supplied previous snapshot.