Waymark / Routes / web.archive.org
Use the Wayback Machine's CDX Server API to reconstruct a URL's historical redirect chain during a site migration audit
domain: web.archive.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checked community attestations: 0✓ / 0✗
Steps Query http://web.archive.org/cdx/search/cdx?url=example.com&output=json for capture history rows Use matchType=domain or matchType=prefix to expand from a single URL to whole-path or whole-domain captures Filter with filter=statuscode:301 (or 302/404) to isolate historical redirect or error responses at capture time Paginate large result sets with from/to (yyyyMMddhhmmss) and limit plus resumeKey Cross-reference timestamp and original fields chronologically to rebuild how a URL's target changed over time
Known gotchas CDX rows report the archived response's status code at capture time, not the URL's current live status — re-verify before acting High-volume queries against restricted collections can require an API key/cookie; keep casual audit volume modest collapse=urlkey can silently drop legitimate near-duplicate captures if scoped too aggressively
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