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WHOIS / RDAP Domain Lookup
x402
WHOIS / RDAP Domain Lookup is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Queries IANA-mandated RDAP to return full domain registration details including age, expiry, registrar, nameservers, DNSSEC status, EPP statuses, risk flags, and optionally certificate-transparency summary.
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
A structured record containing registered_date, age_days, expiration_date, days_until_expiry, last_changed, registrar (name + IANA ID), contacts, nameservers list, dnssec_signed boolean, EPP status codes, risk flags, and optionally a crt.sh certificate-transparency summary for the queried domain.
Example use cases
Example prompt
“Can you do a full WHOIS / RDAP lookup on openai.com — I want to know its registration date, how many days until it expires, the registrar, nameservers, whether DNSSEC is enabled, and any risk flags? Also include the certificate transparency summary.”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/whoisWhen to prefer
Use this endpoint when you need authoritative, structured RDAP/WHOIS data for a domain including expiry, registrar, DNSSEC, and risk signals — especially for brand protection triage, security research, or domain monitoring workflows. Prefer over raw whois parsing tools because it returns structured JSON fields rather than unstructured text.
Side effects
- Domain not found in RDAP — returns error or empty result
- TLD not supported by IANA RDAP — may return partial or no data
- RDAP bootstrap lookup failure — network or IANA service unavailable
- Invalid domain format submitted — returns validation error
- crt.sh unreachable when certificate transparency summary is requested
- Rate limiting from upstream RDAP server
Input
{
"input": {
"body": {
"domain": "example.com",
"include_certificates": true
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
}Output
{
"flags": [],
"domain": "example.com",
"age_days": 11253,
"contacts": {},
"statuses": [
"client delete prohibited",
"client transfer prohibited",
"client update prohibited"
],
"registrar": {
"name": "RESERVED-Internet Assigned Numbers Authority",
"iana_id": "376"
},
"nameservers": [
"elliott.ns.cloudflare.com",
"hera.ns.cloudflare.com"
],
"rdap_server": "https://rdap.verisign.com/com/v1/",
"cert_summary": {
"first_seen": "2010-09-02T16:36:49.000Z",
"recent_certs": 12
},
"last_changed": "2026-01-16T18:26:50Z",
"dnssec_signed": true,
"transfer_date": null,
"expiration_date": "2026-08-13T04:00:00Z",
"registered_date": "1995-08-14T04:00:00Z",
"days_until_expiry": 68
}Tags
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