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Playground demo key · api.reefapi.com
post/change-detect/v1/diff1 credit

Diff a page against a prior baseline (snapshot object OR content_hash OR raw text), or compare two live URLs (url + url2). Returns changed(bool), change_ratio(0..1), change_type(text|structural|both|none), added[]/removed[]/modified[] blocks, and a human summary — all on the NOISE-RESISTANT normalised content.

Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/change-detect/v1/diff \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"url":"https://example.com","url2":"https://www.iana.org/help/example-domains"}'

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