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how.is WHOIS / RDAP Domain Lookup
x402
how.is WHOIS / RDAP Domain Lookup is a paid API for AI agents from how.is, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).
Returns registrar, creation/expiry dates, nameservers, and status codes for a given domain via WHOIS/RDAP.
Price / call$0.005
Success—
StatusUnknown
How this service works
Registrar, creation and expiry dates, nameservers and status codes for a domain.
Output
A parsed WHOIS/RDAP record including the registrar name, domain creation date, expiry date, nameservers, and domain status codes, along with a payment receipt confirming the charge of $0.005 USDC.
Example use cases
Vetting an unfamiliar vendor domain
“Before we wire money to this vendor, can you check the WHOIS details for paymentsco-invoice.com — I want to know who registered it, when, and when it expires?”
Monitoring domain expiry for a client
“Can you look up the WHOIS record for myclient-brand.com and tell me the expiry date so I can warn them if it's coming up soon?”
Investigating a phishing email sender domain
“I got a suspicious email from support@secure-bank-alerts.net — can you pull the WHOIS data on that domain so I can see the registrar, creation date, and nameservers?”
Technical details
Endpoint
POSThttps://how.is/v1/domain/whois?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, parsed WHOIS/RDAP data (registrar, dates, nameservers, status) for a specific domain, especially within an agentic workflow that can handle x402 micropayments. Prefer it over raw WHOIS CLI tools when you need a clean JSON response with a payment receipt, or when querying as part of a domain-vetting or security-analysis pipeline using how.is's suite of domain intelligence tools.
Side effects
- Domain not found in RDAP/WHOIS — returns empty or error if domain is unregistered or RDAP data is unavailable
- Invalid domain format — rejected if the input is not a valid bare domain name (e.g. includes http:// or a path)
- RDAP server unavailable for the TLD — some ccTLDs lack RDAP support
- Rate limiting or payment failure — x402 payment not settled, resulting in 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | A bare domain name, e.g. example.com |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"_shape": "data.data.data: the parsed WHOIS/RDAP record (registrar, dates, nameservers, status)."
},
"result": "WHOIS / RDAP for the requested subject",
"receipt": {
"rail": "x402",
"tool": "whois",
"charge_usd": 0.005,
"settlement_tx": "0x…"
}
}
}Tags
x402
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