# Domain WHOIS/RDAP Lookup

> Domain WHOIS/RDAP Lookup is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).

Retrieves WHOIS/RDAP registration data for a domain including registrar, creation/expiry dates, age, status, nameservers, and DNSSEC info

## Facts

- Endpoint: POST https://twin.unykorn.org/web/whois?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-whois-rdap-lookup-a09a6d05
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Uonc1SAGoFmNaBw8q02yA

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability domain-whois-rdap-lookup-a09a6d05 -d '<json body>'
```

Example prompt: Can you look up the WHOIS info for openai.com — I want to know the registrar, when it was created, when it expires, and whether DNSSEC is enabled?

## When to prefer this

Use this endpoint when you need authoritative domain registration metadata — registrar, dates, nameservers, DNSSEC — without scraping a WHOIS service yourself. Ideal for domain due diligence, expiry monitoring, fraud detection (checking domain age), or infrastructure audits. Prefer over raw WHOIS when you need structured RDAP-formatted output and don't want to parse freeform text.

## Known failure modes

- Domain not found or unregistered returns empty or error response
- TLD not supported by RDAP may fall back to WHOIS with partial data
- Rate limiting or timeout from upstream WHOIS/RDAP servers
- Malformed domain input (missing TLD, invalid characters) returns validation error
- Privacy-protected domains may return redacted registrant details

## How this service works

Domain WHOIS/RDAP: registrar, created, expires, age, status, nameservers, DNSSEC — Genesis402 / UnyKorn Operator Network

## Output

Returns structured registration data for the queried domain including: registrar name, domain creation date, expiry/renewal date, domain age, current registration status flags, list of nameservers, and DNSSEC enablement state — sourced from RDAP and WHOIS protocols.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "params": {
   "type": "object",
   "properties": {
    "domain": {
     "type": "string",
     "description": "required"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "type": "whois-domain",
  "receipt": {
   "tx_hash": "0x<64hex>",
   "amount_usd": 0.002,
   "receipt_id": "g402-<16hex>"
  },
  "sources": [
   {
    "ok": true,
    "name": "<source>"
   }
  ],
  "limitations": "<text>",
  "generated_at": "<iso time>",
  "evidence_hash": "sha256:<64hex>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-whois-rdap-lookup-a09a6d05/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from twin.unykorn.org](https://www.zero.xyz/host/twin.unykorn.org/llms.txt)