Domain WHOIS & DNS Lookup via RDAP
Pricing
from $0.45 / 1,000 domains
Look up domain registration, DNS records, email providers and homepage signals in batches. Registration comes from RDAP; DNS uses Cloudflare.
input
Required
Original text of the first input for this normalized hostname. Duplicate hostnames are removed within the run; rows arrive in completion order.
domain
Required
Lowercase ASCII hostname after IDNA conversion and removal of URL paths or email local parts. Null for invalid inputs. Subdomains remain distinct result rows.
status
Required
ok means no source errors were recorded. Otherwise the first code in errors: INVALID_DOMAIN, TIMEOUT, NETWORK_ERROR, RATE_LIMITED, UPSTREAM_ERROR, INVALID_RESPONSE, RESPONSE_TOO_LARGE, DNS_QUERY_FAILED, BUDGET_EXHAUSTED, ROBOTS_UNAVAILABLE, HOST_NOT_PUBLIC or INTERNAL_ERROR. Partial results can be billable even when status is not ok.
ok
Required
True when errors is empty. Check rdapStatus and homepageStatus for unsupported or skipped work. This flag is not a billing verdict; partial source answers can count.
errors
Required
Source failures as {source, code, message}, ordered by input, rdap, dns, then homepage. Empty means no recorded errors. Multiple DNS query failures can share a code; successful source fields remain available.
registrar
Optional
Registrar name from the RDAP registrar entity, or null when not supplied, unsupported or unavailable. No registrant contact information is returned.
createdAt
Optional
Domain registration date from the RDAP registration event, as supplied by the source. Null when absent or unavailable; this is not the lookup time.
emailProvider
Optional
Provider inferred from the most preferred MX hostname. none means no usable MX; other means an unrecognized provider; null means MX is unknown. This is not mailbox verification.
redirectTarget
Optional
Resolved HTTP Location or HTML meta-refresh target from the homepage, or null when absent or unavailable. Reported without fetching the target.
