# RDAP Domain Registration Lookup

> RDAP Domain Registration Lookup is a paid API for AI agents from dns.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns structured domain registration data (registrar, dates, status, nameservers, domain age) for any domain via RDAP, as clean snake_case JSON.

## Facts

- Endpoint: GET https://dns.use.x402atlas.com/rdap
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rdap-domain-registration-lookup-9f6c0e5e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AdNAfRTie9IuvnvvWzYtq

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 rdap-domain-registration-lookup-9f6c0e5e
```

Example prompt: Can you look up the RDAP registration details for stripe.com — I want to see the registrar, when it was created and when it expires, its current status, and how old the domain is?

## When to prefer this

Prefer this endpoint over raw WHOIS lookups when you need structured, machine-readable domain registration data in snake_case JSON with a computed domain age field. It is ideal for automated pipelines, domain validation flows, or fraud/risk checks where parsing raw WHOIS text would be unreliable. Choose this over the sibling WHOIS endpoint when clean, normalized field names are required.

## Known failure modes

- Domain not found or unregistered — returns empty or error response
- Domain TLD not supported by RDAP protocol
- Invalid domain format in query parameter
- Rate limit exceeded on repeated lookups
- RDAP upstream registry timeout or unavailability

## How this service works

RDAP domain registration lookup: structured registrar, creation/updated/expiry dates, status, nameservers and a computed domain age. A parsed, snake_case JSON alternative to raw WHOIS text.

## Output

A structured snake_case JSON object containing registrar name, creation/updated/expiry dates, domain registration status flags, nameservers list, and a computed domain age — a parsed alternative to raw WHOIS text.

## 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",
       "maxLength": 253,
       "minLength": 1,
       "description": "Bare domain to look up via RDAP (not an IP literal, not localhost, not under a reserved suffix like .local/.internal)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "domain",
      "registrar",
      "created",
      "updated",
      "expiration",
      "status",
      "nameservers",
      "domain_age_days",
      "queried_at"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "The queried domain"
      },
      "status": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "EPP domain status codes"
      },
      "created": {
       "type": "string",
       "description": "Registration date (RFC3339); empty string if unavailable"
      },
      "updated": {
       "type": "string",
       "description": "Last-changed date (RFC3339); empty string if unavailable"
      },
      "registrar": {
       "type": "string",
       "description": "Registrar name; empty string if the registry omits it"
      },
      "expiration": {
       "type": "string",
       "description": "Expiration date (RFC3339); empty string if unavailable"
      },
      "queried_at": {
       "type": "string",
       "format": "date-time",
       "description": "UTC timestamp of the lookup"
      },
      "nameservers": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Authoritative nameserver hostnames"
      },
      "domain_age_days": {
       "type": "integer",
       "description": "Whole days since registration; 0 when the registration date is missing or unparseable"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "example.com",
  "status": [
   "client delete prohibited"
  ],
  "created": "1995-08-14T04:00:00Z",
  "updated": "2023-08-14T07:01:44Z",
  "registrar": "RESERVED-Internet Assigned Numbers Authority",
  "expiration": "2024-08-13T04:00:00Z",
  "queried_at": "2026-06-05T12:00:00Z",
  "nameservers": [
   "a.iana-servers.net",
   "b.iana-servers.net"
  ],
  "domain_age_days": 11000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rdap-domain-registration-lookup-9f6c0e5e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.use.x402atlas.com](https://www.zero.xyz/host/dns.use.x402atlas.com/llms.txt)