# Karma.Domains WHOIS Domain Checker

> Karma.Domains WHOIS Domain Checker is a paid API for AI agents from api.karma.domains, paid per call via x402, $1.5/call, status unknown (last checked 2026-10-16).

Performs a WHOIS lookup on a given domain name to return its registration status and related metadata

## Facts

- Endpoint: GET https://api.karma.domains/v1/domains/checker/whois?utm_source=zero.xyz
- Price: $1.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/karma-domains-whois-domain-checker-b4191a39
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SlhuHkKsy6p63P524vMAc

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 karma-domains-whois-domain-checker-b4191a39
```

Example prompt: Can you check the WHOIS status of mybrand.com and tell me if it's currently registered or available?

## When to prefer this

Choose this endpoint when you need a quick, per-domain WHOIS registration status check and are willing to pay per-query via x402 micropayment. It is backed by Karma.Domains' large expired domain database, making it especially useful when cross-referencing WHOIS status alongside expired/auction domain data. Prefer it over generic WHOIS APIs when you also plan to explore expired domain opportunities on the same platform.

## Known failure modes

- Missing or invalid domain query parameter returns an error
- Domain with unusual TLDs may not be supported
- Rate limiting or payment failure (HTTP 402) if payment not processed
- WHOIS data unavailable for certain private or restricted TLDs
- Network timeout for slow WHOIS registry responses

## How this service works

Find expired domain names with high traffic and strong SEO backlinks daily. Boost your revenue by searching our database of 13,000,000+ expired domains from auctions, backorders, and dropped lists—complete with rich metrics and domain age.

## Output

Returns a JSON object containing the queried domain name and its registration status (e.g. 'Registered' or similar), reflecting current WHOIS data for that domain.

## 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",
       "example": "example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "example.com",
  "domain_status": "Registered"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/karma-domains-whois-domain-checker-b4191a39/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.karma.domains](https://www.zero.xyz/host/api.karma.domains/llms.txt)