# Domain Registration Expiry & Registrar Lookup

> Domain Registration Expiry & Registrar Lookup is a paid API for AI agents from sentinel.rootstuff.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the registration expiry date and registrar information for a given domain name

## Facts

- Endpoint: GET https://sentinel.rootstuff.io/x402/domain
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-registration-expiry-registrar-lookup-f5be8386
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RyJWg290j8mRT4h_smYE0

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-registration-expiry-registrar-lookup-f5be8386
```

Example prompt: When does stripe.com's domain registration expire, and who is the registrar?

## When to prefer this

Use this endpoint when you need a quick, single-call lookup of a domain's expiry date and registrar without needing full DNS record data. Prefer this over the full DNS record sibling endpoint when WHOIS registration metadata (expiry, registrar) is the specific need rather than DNS resolution records. Ideal for domain health monitoring, supplier due diligence, or proactive renewal workflows.

## Known failure modes

- Domain not found in WHOIS registry — returns empty or error if domain does not exist
- TLD not supported by WHOIS lookup — some ccTLDs restrict or do not publish expiry data
- Rate limiting or upstream WHOIS timeout — may return an error or partial result
- Malformed domain input — non-parseable hostnames may return an error
- Privacy-protected registrations may hide registrar details

## How this service works

Registration expiry and registrar for a domain

## Output

Returns the registrar name and registration expiry date for the registrable portion of the supplied domain or hostname, allowing agents to assess domain ownership tenure and upcoming renewal deadlines.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "description": "Domain or hostname; the registrable domain is looked up."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-registration-expiry-registrar-lookup-f5be8386/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentinel.rootstuff.io](https://www.zero.xyz/host/sentinel.rootstuff.io/llms.txt)