# Domain Check via RDAP

> Domain Check via RDAP is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns registration age, expiry, registrar, EPP status codes, nameservers, and DNSSEC status for any domain, with a GO/HOLD/STOP fraud-risk verdict based on RDAP data.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/domain-check
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-check-via-rdap-fc2915c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aEOVyGErf10DGxKR7ahNu

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-check-via-rdap-fc2915c5
```

Example prompt: Before I pay this invoice, check the domain acme-payments-ltd.com — how old is it, when does it expire, and what's the fraud risk verdict?

## When to prefer this

Choose this endpoint when you need a cheap, fast, authoritative fraud signal based on domain age and registry status — especially for invoice fraud, vendor impersonation, or phishing triage. It uses RDAP (the registries' own protocol) rather than third-party WHOIS scrapers, making it more accurate and reliable. Prefer it over general WHOIS tools when you need a structured verdict (GO/HOLD/STOP) rather than raw text output.

## Known failure modes

- Registry does not publish RDAP — endpoint refuses rather than returning incomplete data
- Domain does not exist or is unregistered — returns appropriate not-found response
- Invalid domain format in query parameter — returns validation error
- Network or upstream registry timeout — may return an error instead of data

## How this service works

Registration age, expiry and registry status for any domain, from RDAP — the registries' own protocol. Returns days since registration, days to expiry, registrar, EPP status codes, nameservers and DNSSEC as one GO / HOLD / STOP verdict. Domain age is the strongest cheap signal in invoice and vendor-impersonation fraud: the payment details that change always arrive from a domain registered weeks ago. Refuses rather than guessing when a registry publishes no RDAP.

## Output

Returns a structured response including days since registration, days until expiry, registrar name, EPP status codes, nameservers, DNSSEC flag, and a single GO/HOLD/STOP verdict summarizing fraud risk. Refuses to guess if the registry publishes no RDAP data.

## 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name"
      }
     }
    }
   },
   "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/domain-check-via-rdap-fc2915c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)