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Playground demo key · api.reefapi.com
post/change-detect/v1/batch1 credit

Snapshot up to 20 URLs concurrently in one call (each independently SSRF-guarded, shared concurrency). Returns a compact fingerprint per URL.

Working example
Parameters

List of URLs to snapshot in one call (max 20); each is independently SSRF-guarded and fetched concurrently.

Scope detection to a region instead of the whole page. Accepts a FULL CSS selector ('div.price-box > span.amount', '.product:nth-child(2)', '[data-testid=total]') OR an XPath ('//div[@id="price"]', '//table//tr[2]/td[3]') — lxml-backed. If the selector matches nothing the whole page is used and `selector_matched:false` is reported.

request preview
curl -X POST https://api.reefapi.com/change-detect/v1/batch \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"urls":"[\"https://example.com\",\"https://www.iana.org/domains/reserved\"]"}'

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