vehcdj664efetfrsolne5umanq.srv.us x402 offerings

Use when an agent is about to give a user links or citations: send up to 10 URLs, and get back the status, redirect chain, final URL, title and hash of each, so a dead, moved or blocked link is caught first. A URL whose domain does not resolve is reported as dead and charged. US$0.005 per call; broken-link check for citations. 5 free calls a day.

Use when an agent is about to quote or cite a web page as the source of a claim: send the URL and the quote word for word, and get back exact, fuzzy or none, with offsets and a signed receipt, so a misquote is caught before a user sees it. US$0.01 per call; fact check of citations. For 3 or more quotes on one page, verify/quotes costs less. PDFs are read too, on the full service, with pdf_page and pdf_page_end. 5 free calls a day.

Use when an agent needs to show later that a file, answer or record existed unchanged at a point in time: send its sha256, and get back a signed, timestamped receipt over it; a later altered copy no longer matches. Optional note; with an idempotency_key (x402 payments only), a retry gets the same receipt and is not a new record. For signed evidence of what a web page said at a given time (provenance), use /v1/fetch, whose receipt attests the page hashes. 5 free calls a day.