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Domain Availability & RDAP Lookup
x402
Domain Availability & RDAP Lookup is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Checks whether a domain name is registered and returns RDAP/WHOIS data including registrar, registration date, expiry date, days until expiry, and EPP status flags.
Price / call$0.005
Success—
StatusUnknown
How this service works
Domain availability / RDAP lookup / WHOIS replacement / domain registration checker / expiry date lookup. Returns is_registered, registrar, registration date, expiry date, days_until_expiry, and current EPP status flags for any TLD that supports RDAP (effectively all gTLDs and most ccTLDs). Backed by rdap.org, the public RFC-7480-compliant aggregator. 404s map to is_registered: false rather than an error.
Output
Returns a JSON object with is_registered (boolean), registrar name, registration date, expiry date, days_until_expiry (integer), and EPP status flags (e.g. clientTransferProhibited). For unregistered domains, returns is_registered: false with no further data.
Example use cases
Example prompt
“Can you check if 'startupidea.io' is already registered, and if so, tell me who owns it, when it expires, and what its current EPP status is?”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/domain-availabilityWhen to prefer
Use this endpoint when you need programmatic, structured domain registration data (registrar, dates, EPP flags) without screen-scraping a WHOIS website. Prefer over raw WHOIS when you need machine-readable JSON output, expiry countdowns, or EPP status flags. Works for all gTLDs and most ccTLDs via the RFC-7480 RDAP standard.
Side effects
- Domain uses an unsupported TLD with no RDAP coverage — returns partial or empty data
- Malformed domain input — returns validation error
- RDAP registry timeout — may return error or incomplete data
- Domain is registered but RDAP record is sparse — some fields may be null
Input
{
"input": {
"body": {
"domain": "example.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"domain": "example.com",
"source": "rdap.org",
"status": [
"client delete prohibited",
"client transfer prohibited",
"client update prohibited"
],
"registrar": "RESERVED-Internet Assigned Numbers Authority",
"expires_date": "2026-08-13T04:00:00Z",
"last_changed": "2026-01-16T18:26:50Z",
"is_registered": true,
"registered_date": "1995-08-14T04:00:00Z",
"days_until_expiry": 68
}Tags
x402
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