# x402 Tools – Domain RDAP Lookup

> x402 Tools – Domain RDAP Lookup is a paid API for AI agents from x402-tools-production-2755.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Returns RDAP (WHOIS successor) registry data for up to 20 domains per call, including registrar, creation/expiry dates, age, status, transfer lock, nameservers, and DNSSEC.

## Facts

- Endpoint: GET https://x402-tools-production-2755.up.railway.app/tools/domain?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-domain-rdap-lookup-4e418547
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WWL60AAITMZlKqIEMP-Z1

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 x402-tools-domain-rdap-lookup-4e418547
```

Example prompt: Before I click that link, can you look up the RDAP registry data for suspicious-deal.com and tell me how old it is, who the registrar is, and whether DNSSEC is enabled?

## When to prefer this

Choose this endpoint when you need authoritative registry-level data (RDAP) about domain ownership, age, status, and security configuration — especially for trust-vetting, phishing detection, or due diligence workflows. Prefer it over simple DNS lookups when you need registrar, creation/expiry dates, or transfer lock details. Supports bulk queries of up to 20 domains per call at a flat rate, making it efficient for batch checks.

## Known failure modes

- Domain not found in RDAP (unregistered or unsupported TLD) — returns empty or null record
- More than 20 domains supplied in a single call — request rejected
- Invalid domain format passed — parsing error returned
- RDAP registry temporarily unavailable for a TLD — partial results or timeout
- Network error reaching the upstream RDAP registry — 5xx response

## How this service works

Use to vet a domain or URL before trusting it, or to check if a name is available. Registry RDAP data (the WHOIS successor) for up to 20 domains per call: registrar, created/expiry dates, age in days, status and transfer lock, nameservers, DNSSEC. Subdomains resolve to their registered domain. One flat price per call.

## Output

For each queried domain, the agent receives: registrar name, creation date, expiry date, domain age in days, registration status flags, transfer lock status, nameservers list, and DNSSEC enabled/disabled. Subdomains are automatically resolved to their registered parent domain before lookup.

## 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",
     "properties": {
      "domain": {
       "type": "string",
       "description": "A single domain or URL (alternative to 'domains')"
      },
      "domains": {
       "type": "string",
       "description": "Comma-separated domains or URLs, up to 20"
      }
     }
    }
   },
   "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/x402-tools-domain-rdap-lookup-4e418547/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-tools-production-2755.up.railway.app](https://www.zero.xyz/host/x402-tools-production-2755.up.railway.app/llms.txt)