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RDAP Domain Registration Lookup
x402
RDAP Domain Registration Lookup is a paid API for AI agents from api.aventtech.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Checks whether a domain name is registered or available and returns authoritative RDAP registry data including registrar, dates, nameservers, and status flags.
Price / call$0.02
Success—
StatusUnknown
How this service works
Look up a domain name and check whether it is registered or available. Queries authoritative registry data via RDAP to return registration status, the registrar, creation and expiry dates, nameservers and status flags. Real-time domain availability check, WHOIS-style lookup and expiry monitoring for any domain.
Output
Returns whether the domain is registered or available, along with RDAP registry data: registrar name, creation date, expiry date, nameservers, and domain status flags (e.g. clientTransferProhibited, active).
Example use cases
Competitive domain monitoring for startups
“I'm launching a new product line called 'CloudSync' — can you check if cloudsync.com, cloudsync.io, and cloudsync.dev are available? If any are taken, let me know who registered them and when they expire so I can decide if it's worth reaching out.”
Website migration and DNS validation
“We're moving our company website to a new registrar and I need to verify all our domain details first. Can you pull up the current registrar, nameservers, and status flags for ourcompany.com and ourcompany.co.uk so I can make sure everything transfers cleanly?”
Portfolio acquisition due diligence
“I'm looking at buying a portfolio of 15 domain names from a seller. Can you quickly check which ones are still active, when they expire, who owns them currently, and if any have transfer restrictions? I want to know what I'm actually getting.”
Technical details
Endpoint
GEThttps://api.aventtech.com/lookup/domain?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need authoritative, real-time domain registration data from the official RDAP registry — more structured and reliable than legacy WHOIS. Ideal for checking domain availability, verifying ownership, auditing expiry dates, or gathering nameserver/registrar info for a specific domain.
Side effects
- Domain not found / available — registry returns no record
- Invalid domain format — query param missing or malformed
- Registry timeout or RDAP service unavailable — upstream error
- TLD not supported by RDAP — some legacy or ccTLDs may lack RDAP coverage
- Rate limiting — too many requests in short succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"domain": "example.com",
"registrar": "ICANN",
"expires_on": "2027-08-13",
"registered": true
}
}Tags
x402
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