# RDAP Domain Registration Lookup

> RDAP Domain Registration Lookup is a paid API for AI agents from x402-datashop-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns authoritative ICANN RDAP registration facts for a domain — dates, registrar, EPP status locks, and nameservers — normalized across all TLDs.

## Facts

- Endpoint: GET https://x402-datashop-production.up.railway.app/v1/domain/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-4dbe21af
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ftIldU-YJ1xO79RSzdoGw

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-4dbe21af
```

Example prompt: Can you pull up the RDAP registration details for openai.com — I want to know when it was registered, when it expires, who the registrar is, its EPP status locks, and its nameservers?

## When to prefer this

Choose this endpoint when you need authoritative, normalized domain registration metadata (dates, registrar, EPP locks, nameservers) pulled directly from the ICANN-mandated RDAP registry of record for any TLD. Prefer it over WHOIS-based tools for standardized, machine-readable output without personal data concerns, and when you need reliable cross-TLD normalization with a computed domain age.

## Known failure modes

- Missing domain parameter returns 400 or validation error
- Invalid or non-existent domain returns 404 or empty result
- Unsupported or new TLD with no RDAP bootstrap entry may return an error
- Registry RDAP endpoint temporarily unavailable causes upstream timeout or 502
- Payment not processed (x402 protocol) results in 402 Payment Required

## How this service works

Authoritative domain registration facts from the ICANN-mandated RDAP protocol (rdap.org bootstrap -> registry of record), normalized across all TLDs: registration/expiration/last-changed dates, computed age_days, registrar name, EPP status locks and nameservers. Query: ?domain=google.com (required). No personal data served. 24h cache.

## Output

A normalized JSON object containing: registration/expiration/last-changed timestamps, computed age_days, registrar name, EPP status lock codes (e.g. clientTransferProhibited), and nameserver hostnames — all sourced from the authoritative ICANN RDAP registry of record for the queried TLD. Results are cached for 24 hours.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Fully-qualified domain name, e.g. google.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rdap-domain-registration-lookup-4dbe21af/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-datashop-production.up.railway.app](https://www.zero.xyz/host/x402-datashop-production.up.railway.app/llms.txt)