Waymark / Routes / commoncrawl.org Query the Common Crawl Index API to check whether and when a domain's pages have been captured in past web crawls
domain: commoncrawl.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checked community attestations: 0✓ / 0✗
Steps Pick a crawl ID (e.g. CC-MAIN-2026-XX) from the published list at index.commoncrawl.org/collinfo.json Query the index at https://index.commoncrawl.org/CC-MAIN-2026-XX-index?url=example.com/*&output=json Parse the returned WARC filename, offset, and length fields to locate matching records inside the WARC archive Fetch the archived page content with an HTTP Range request against the WARC file on S3 using offset/length Repeat across several monthly crawl IDs to see whether/when a URL or domain first appeared or dropped out of captures Known gotchas Common Crawl is a periodic research snapshot, not a real-time index — absence from it doesn't mean a page isn't live or indexed by Google/Bing Each monthly crawl samples only part of the web, so gaps for lower-authority or newly published pages are expected and normal The live CDX-style index endpoint can be throttled; the columnar Parquet index on S3/Athena is the more reliable option for bulk analysis
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