Use when an agent needs a web page as clean text and must know what actually came back: send a URL, and get back a content_kind verdict (real, bot_wall, js_shell, paywall, http_error and others), status, final URL, title, hashes, prompt-injection flags, clean text if return_text is set, and a signed receipt, so a bot wall or error page is not summarised as real. PDFs are read too, on the full service (edge: 501 not_on_edge, uncharged): page.pdf with page_count, pages_read and truncated. Costs US$0.002 per call in USDC via x402 (Base), charged only when the call succeeds; a bad request is refused unpaid. Pay by putting an x402 payment payload in _meta["x402/payment"]. Without one it uses the free trial (5 calls a day per address), then returns the payment requirements. Docs: https://vehcdj664efetfrsolne5umanq.srv.us/docs/fetch