# Domain Age & Registrar Lookup (RDAP/WHOIS)

> Domain Age & Registrar Lookup (RDAP/WHOIS) is a paid API for AI agents from sdn-screen-x402.sdnscreen.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Returns domain registration age, registrar details, nameservers, DNSSEC status, and expiration date via RDAP for any given domain

## Facts

- Endpoint: GET https://sdn-screen-x402.sdnscreen.workers.dev/v1/whois-age?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-age-registrar-lookup-rdap-whois-36c8cadf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rfri0IEe9Z-4O3XvwBSeq

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-age-registrar-lookup-rdap-whois-36c8cadf
```

Example prompt: Can you check how old the domain suspicious-store.com is, who registered it, and whether it was registered less than 30 days ago?

## When to prefer this

Use this endpoint when you need authoritative registration age, registrar identity, and RDAP-sourced metadata for a domain — especially for fraud detection workflows where newly registered domains are a risk signal. Prefer this over generic WHOIS tools when you need structured JSON output with a newlyRegistered flag, pay-per-call pricing with no API key, and RDAP compliance. It accepts URLs and email addresses as input and extracts the registrable domain automatically.

## Known failure modes

- Domain not found / unregistered — returns registered: false
- Invalid or malformed domain input — rejected before RDAP query
- RDAP registry unavailable — upstream timeout or error
- TLD not supported by RDAP bootstrap — limited RDAP coverage for some ccTLDs
- Rate limiting or payment failure — x402 or MPP payment not completed

## How this service works

Six keyless pay-per-call tools for AI agents: OFAC SDN crypto-wallet screen, live DNS records lookup, SPF/DMARC/DKIM email-auth check, domain age/registrar (RDAP), email address MX verify and URL unshorten/redirect check. $0.01 per call: USDC on Base over x402, or USDC on Tempo over MPP. Also a remote MCP server at /mcp (x402).

## Output

A JSON object containing: whether the domain is registered, registration date, domain age in days and years, registrar name and IANA ID, nameservers list, DNSSEC status, expiration date, last changed date, a flag indicating if the domain was registered fewer than 30 days ago, the RDAP server used, and the timestamp of the check.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "examples": [
        "example.com"
       ],
       "maxLength": 253,
       "minLength": 3,
       "description": "Domain, e.g. example.com. A URL, hostname or email address is reduced to its registrable domain. Alias: name."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "domain",
      "registered",
      "registrationDate",
      "ageDays",
      "registrar",
      "status",
      "checkedAt"
     ],
     "properties": {
      "dnssec": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "domain": {
       "type": "string"
      },
      "source": {
       "type": "string"
      },
      "status": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "ageDays": {
       "type": [
        "integer",
        "null"
       ]
      },
      "ageYears": {
       "type": [
        "number",
        "null"
       ]
      },
      "checkedAt": {
       "type": "string",
       "format": "date-time"
      },
      "registrar": {
       "type": [
        "object",
        "null"
       ],
       "properties": {
        "name": {
         "type": [
          "string",
          "null"
         ]
        },
        "ianaId": {
         "type": [
          "string",
          "null"
         ]
        }
       }
      },
      "rdapServer": {
       "type": "string"
      },
      "registered": {
       "type": "boolean",
       "description": "false when the registry returns 404"
      },
      "lastChanged": {
       "type": [
        "string",
        "null"
       ]
      },
      "nameservers": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "expirationDate": {
       "type": [
        "
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "dnssec": false,
  "domain": "google.com",
  "source": "RDAP (registry), via IANA bootstrap",
  "status": [
   "client delete prohibited",
   "client transfer prohibited",
   "client update prohibited",
   "server delete prohibited",
   "server transfer prohibited",
   "server update prohibited"
  ],
  "ageDays": 10619,
  "ageYears": 29.07,
  "checkedAt": "2026-10-12T17:50:00.000Z",
  "registrar": {
   "name": "MarkMonitor Inc.",
   "ianaId": "292"
  },
  "rdapServer": "https://rdap.verisign.com/com/v1/",
  "registered": true,
  "lastChanged": "2019-09-09T15:39:04Z",
  "nameservers": [
   "ns1.google.com",
   "ns2.google.com",
   "ns3.google.com",
   "ns4.google.com"
  ],
  "expirationDate": "2028-09-14T04:00:00Z",
  "newlyRegistered": false,
  "registrationDate": "1997-09-15T04:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-age-registrar-lookup-rdap-whois-36c8cadf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sdn-screen-x402.sdnscreen.workers.dev](https://www.zero.xyz/host/sdn-screen-x402.sdnscreen.workers.dev/llms.txt)