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Playground demo key · api.reefapi.com
post/domain-availability/v1/rdap1 credit

Full WHOIS via RDAP for a registered domain (registrar, created/expires, status, nameservers, dnssec, abuse). A 404 is returned cleanly (available on RDAP-served TLDs; null + a pointer to 'check' on TLDs with no RDAP server), not an error.

Working example
Parameters

A full domain to check (e.g. myapp.com, my-startup.io). A bare host, a full URL, or a leading www. are all accepted and normalized.

If true, also attach the raw upstream RDAP JSON under whois.raw_rdap.

If true, return the full RDAP registrant contact. Default false → personal data dropped (GDPR), organization kept.

request preview
curl -X POST https://api.reefapi.com/domain-availability/v1/rdap \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"domain":"github.com"}'

Hit Send to run this endpoint live.