Workflow guide
An agent can cite a public page and still leave a reviewer with a fragile reference. The page may change, disappear or render differently by the time someone follows the link. Attest Capture gives the workflow a second artifact: a PNG, PDF or rendered HTML capture of what the Attest renderer saw, a UTC timestamp, a SHA-256 digest and a public evidence-receipt URL. The original source URL remains part of the record, so the receipt supplements the citation rather than replacing it.
A practical pattern is to call Capture after the agent selects the source it intends to cite. Store the returned capture ID, digest, capture time and evidence URL beside the agent's answer. Keep the signed artifact URL only as a short-lived retrieval path; it expires after 24 hours, while reloading the public evidence page can issue a fresh signed link. PNG works for a visual record, PDF can preserve a paged rendering, and HTML records the rendered markup returned by the capture path. The API charges one credit for PNG or HTML and two for PDF.
The receipt makes a narrow claim. It shows what Attest's renderer received at the recorded time and binds the stored bytes to the displayed digest. It does not prove that the source was accurate, that the page author endorsed the agent's answer, or that the quoted passage was interpreted correctly. Reviewers should still open the source, assess its authority and compare the agent's wording with the captured material. For dynamic or authenticated pages, confirm that the public renderer can reach the evidence you need before depending on this pattern.