The web keeps falling apart. Pages go offline, accounts get deleted, papers slip behind paywalls, projects shut down. Usually a copy survives somewhere, in the Wayback Machine, archive.today, Common Crawl, scholarly indexes like Crossref, libraries like Open Library, and hundreds of smaller subject-specific archives. The catch is that they are all separate. To find out where something was saved, you used to open them one at a time: Wayback first, then archive.today, then a dozen academic and book databases.