# VendSDK WHOIS Lite — Domain Registration Lookup via RDAP

> VendSDK WHOIS Lite — Domain Registration Lookup via RDAP is a paid API for AI agents from vendsdk.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Returns domain registration status, registrar name, registration/expiry dates, and nameservers for a given domain using RDAP (lightweight field set)

## Facts

- Endpoint: GET https://vendsdk.com/api/v/whois-lite
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vendsdk-whois-lite-domain-registration-lookup-via-rdap-30bc0991
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JGTD-OFYoQuPwlTeRwLk_

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 vendsdk-whois-lite-domain-registration-lookup-via-rdap-30bc0991
```

Example prompt: Can you look up the WHOIS registration info for stripe.com — I want to know the registrar, when it was registered, when it expires, and what nameservers it's using?

## When to prefer this

Choose this endpoint when you need lightweight, structured domain registration metadata (registrar, dates, nameservers, status) without the full verbosity of a raw WHOIS dump. Ideal for agent workflows that need machine-readable RDAP fields cheaply ($0.008/call) — such as brand monitoring, phishing investigation, domain acquisition due diligence, or security triage pipelines. Prefer this over the combined bundle endpoint (DNS + TLS + RDAP + HTTP HEAD) when you only need WHOIS/RDAP data and want to minimize cost.

## Known failure modes

- Domain not found or unregistered — returns ok: false or empty result
- Invalid domain format — query rejected
- RDAP registry unavailable for TLD — source may be missing or partial
- Rate limiting or payment failure — HTTP 402 or 429 response
- TLD not supported by RDAP — some ccTLDs lack RDAP coverage

## How this service works

Domain registration status, registrar, dates, and nameservers via RDAP (lite fields only)

## Output

Returns a JSON object with fields including ok (boolean success flag), domain (the queried domain), registrar (registrar name), registration status, registration and expiry dates, nameservers, and the RDAP source used for the 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain e.g. example.com"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "domain": {
       "type": "string"
      },
      "source": {
       "type": "string"
      },
      "service": {
       "type": "string"
      },
      "registrar": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vendsdk-whois-lite-domain-registration-lookup-via-rdap-30bc0991/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vendsdk.com](https://www.zero.xyz/host/vendsdk.com/llms.txt)