Price: free. Checks one buying signal against its source page: the quote must be on the page, the page must be about the company, and the event date must be printed near the quote (or be the page's own date) and fall within the last 90 days. Returns pass with the date and source tier (primary, wire, major, derivative), or the rule it failed (date, stale, fetch, quote, company). Use when: "is this signal real", "confirm the quote is on the page", "check this claim about acme.com", "verify this news / job post / funding round", before putting a signal in front of a seller. Skip when: there is no source URL and verbatim quote to check. A signal that fails is not confirmed by its page; the result names the rule it failed. Quoted page text is normalized; a quote that reads like an instruction keeps its text and is flagged in Flags with the attack family.