# x402whois.com WHOIS Lookup

> x402whois.com WHOIS Lookup is a paid API for AI agents from x402whois.com, paid per call via x402, $0.1/call, status down (last checked 2026-10-27).

Performs a WHOIS lookup for a given domain name, returning registration and ownership information

## Facts

- Endpoint: POST https://x402whois.com/api/v1/whois?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: down
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402whois-com-ad48ed0d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I_vmLikRs6KBSCNH8jhZJ

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 x402whois-com-ad48ed0d -d '<json body>'
```

Example prompt: Can you do a WHOIS lookup on openai.com and tell me who registered it, when it expires, and which registrar is managing it?

## When to prefer this

Use this endpoint when you need quick, on-demand WHOIS lookups for individual domains and are comfortable with micro-payment billing via x402 (0.1 USDC per query). Suitable for agents that need to verify domain ownership, check registration status, or gather registrar details as part of a broader workflow without needing a bulk or subscription-based WHOIS service.

## Known failure modes

- Domain not found or unregistered — returns empty or not-found response
- Invalid domain format — returns error for malformed domain input
- WHOIS rate limiting by upstream registry — may return throttled or incomplete data
- TLD not supported — some newer or uncommon TLDs may lack WHOIS data
- Payment failure — x402 payment of 0.1 USDC not completed, request rejected

## How this service works

Basic whois lookup

## Output

Returns WHOIS record data for the queried domain, typically including registrant contact details, registration and expiration dates, registrar name, nameservers, and domain status flags.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402whois-com-ad48ed0d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402whois.com](https://www.zero.xyz/host/x402whois.com/llms.txt)