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Domain WHOIS Lookup
x402
Domain WHOIS Lookup is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Returns comprehensive domain registration information including registrar, nameservers, expiration dates, DNSSEC status, and SSL certificate summary for a given domain name.
Price / call$0.02
Success—
StatusUnknown
How this service works
WHOIS / RDAP / domain age / domain expiry / registrar finder / nameserver lookup / DNSSEC check / TLD registration record / brand-protection triage. Short alias of whois-lookup. Queries the IANA-mandated RDAP endpoint and returns registered_date, age_days, expiration_date, days_until_expiry, last_changed, registrar (name + IANA id), contacts, nameservers, dnssec_signed, EPP statuses, and risk flags. Optionally appends a crt.sh certificate-transparency summary.
Output
Returns a JSON object with the domain's registrar name and IANA ID, list of nameservers, registration and expiration dates, days until expiry, domain age in days, DNSSEC signing status, RDAP server URL, current domain status flags (e.g. client delete prohibited), and an SSL certificate summary if available.
Example use cases
Example prompt
“Can you look up the WHOIS registration info for openai.com — I want to know who the registrar is, when it was registered and expires, whether DNSSEC is enabled, and what nameservers it's using?”
Technical details
Endpoint
POSThttps://x402.agentutility.ai/whoisWhen to prefer
Choose this endpoint when you need structured, machine-readable domain registration metadata including expiry dates, registrar identity, nameservers, and DNSSEC status for a single domain. Prefer this over raw WHOIS text parsers when you need a clean JSON response suitable for downstream processing. Ideal for domain monitoring, due diligence workflows, or cybersecurity investigations where programmatic access to domain lifecycle data is required.
Side effects
- Domain not found or does not exist — returns empty or error response
- Invalid domain format — malformed input rejected
- RDAP/WHOIS data unavailable for certain TLDs or private registrations
- Payment not settled in USDC over x402 — request rejected with 402 status
- Rate limiting or quota exceeded
Output
Schema · Response
{
"type": "json",
"example": {
"flags": [],
"domain": "example.com",
"age_days": 11223,
"statuses": [
"client delete prohibited"
],
"registrar": {
"name": "RESERVED-Internet Assigned Numbers Authority",
"iana_id": "376"
},
"nameservers": [
"A.IANA-SERVERS.NET",
"B.IANA-SERVERS.NET"
],
"rdap_server": "https://rdap.verisign.com/com/v1/",
"cert_summary": null,
"dnssec_signed": true,
"expiration_date": "2026-08-13T04:00:00Z",
"registered_date": "1995-08-14T04:00:00Z",
"days_until_expiry": 98
}
}Tags
x402
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