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RDAP Whois Lookup
x402
RDAP Whois Lookup is a paid API for AI agents from mcpfax-utility.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Returns structured RDAP (Registration Data Access Protocol) registration data for a domain name or IP address — the modern replacement for legacy WHOIS.
Price / call$0.005
Success—
StatusUnknown
How this service works
RDAP whois — Structured domain/IP registration data (modern whois).
Output
A structured RDAP JSON record containing registrar name, registration and expiration dates, nameservers, status codes, registrant/admin/tech contact handles (redacted per GDPR where applicable), events history, and for IP queries: network block, organization, and abuse contact details.
Example use cases
Domain expiry monitoring for portfolio
“Run an RDAP whois lookup on stripe.com and tell me the registration expiry date and current registrar.”
IP network ownership investigation
“Who owns the IP address 8.8.8.8? Do an RDAP lookup and tell me the network name, organization, and abuse contact.”
Domain due diligence before acquisition
“I'm thinking of buying the domain acmecorp.io — can you pull the RDAP registration data and tell me when it was created, who registered it, and its current status?”
Technical details
Endpoint
GEThttps://mcpfax-utility.bowling-anthony.workers.dev/v1/rdapWhen to prefer
Choose this endpoint when you need structured, machine-readable domain or IP registration data that goes beyond legacy WHOIS text parsing. It's ideal when you need reliable field-level data (expiry date, registrar, nameservers) without scraping unstructured text. Prefer it over raw WHOIS tools when working in an agentic pipeline that needs consistent JSON output, or when querying newer TLDs that only support RDAP. Not suitable for checking domain availability for purchase registration — use a registrar availability API instead.
Side effects
- Domain not found or unregistered — returns empty or not-found RDAP response
- TLD registry does not support RDAP — may return an error or unsupported message
- IP address not in a delegated block — no record returned
- Malformed query input (invalid domain or IP format) — returns validation error
- RDAP registry temporarily unavailable — upstream timeout or 5xx error
- Rate limiting by upstream RDAP registry — intermittent failures under high query volume
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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