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AgentUtility WHOIS/RDAP Domain Lookup
x402
AgentUtility WHOIS/RDAP Domain Lookup is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-16).
Performs RDAP-based WHOIS lookup for a domain, returning registration details, registrar info, contacts, nameservers, DNSSEC status, EPP codes, and optional certificate-transparency summary.
Price / call$0.02
Success—
StatusUnknown
How this service works
WHOIS API and RDAP domain lookup for agents. Returns registration date, domain age, expiration date, registrar, contacts, nameservers, DNSSEC status, EPP status codes, transfer history, and risk flags from the IANA-mandated RDAP endpoint for the domain's TLD. Optionally appends a certificate-transparency summary. Use it for domain diligence, phishing triage, brand protection, registrar checks, or expiry monitoring.
Output
Returns a structured record with: registration date, domain age, expiration date, registrar name and contact, registrant/admin/tech contacts, nameservers, DNSSEC status, EPP status codes, transfer history, risk flags, and optionally a certificate-transparency summary from CT logs.
Example use cases
Phishing domain triage
“I got an email from secure-banking-update.com — can you look it up and tell me when it was registered, how old it is, what the EPP status codes are, and whether there are any risk flags I should know about?”
Domain expiry monitoring
“Can you check the WHOIS details for mybrand.io and tell me exactly when it expires, who the registrar is, and whether there are any transfer-lock status codes active?”
Acquisition due diligence
“I'm thinking about buying vintagewatches.com — can you pull the full RDAP record including registration date, domain age, registrar, transfer history, nameservers, and DNSSEC status so I can assess it properly?”
Technical details
Endpoint
POSThttps://x402.agentutility.ai/whois-lookupWhen to prefer
Choose this endpoint when you need authoritative, IANA-sourced RDAP data rather than legacy WHOIS text parsing. Ideal for agent workflows requiring structured JSON output, phishing triage pipelines, brand-protection monitoring, or domain acquisition due diligence. Prefer over generic WHOIS scrapers when accuracy, structured fields, and certificate transparency correlation are needed. The x402/USDC micropayment model makes it suitable for high-frequency per-domain agent calls without subscription overhead.
Side effects
- Domain not found or unregistered — empty/null RDAP response
- TLD not supported by IANA RDAP — endpoint may return an error
- Rate limiting from underlying RDAP registry — transient failure
- Malformed domain input — validation error returned
- CT summary unavailable if option not requested or CT logs unreachable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"flags": [],
"found": true,
"domain": "example.com",
"age_days": 11223,
"contacts": {},
"statuses": [
"client delete prohibited",
"client transfer 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,
"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": 98
}
}Tags
x402
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