# Domain Registration Lookup (RDAP)

> Domain Registration Lookup (RDAP) is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns authoritative RDAP registration data for a domain — including dates, registrar, EPP status, nameservers, DNSSEC, and abuse contact — via IANA bootstrap, no API key required.

## Facts

- Endpoint: POST https://flat-rate-llm.kikoribera03.workers.dev/v1/red/whois
- Price: $0.005/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-lookup-rdap-4c4c0f26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_geIS9RhHuJ538dNcprJcv

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-lookup-rdap-4c4c0f26 -d '<json body>'
```

Example prompt: Can you look up the RDAP registration data for openai.com — I need the creation date, expiry date, registrar, EPP status codes, nameservers, and DNSSEC info?

## When to prefer this

Prefer this endpoint when you need authoritative, structured registration data read directly from the registry's own RDAP service (not scraped from port-43 WHOIS text), and you want computed fields like domain age and days-to-expiry included automatically. It requires no API key or account and handles IANA bootstrap routing transparently. Choose it over raw WHOIS scraping when accuracy and structure matter, or when you need to handle TLDs that lack RDAP gracefully.

## Known failure modes

- TLD has no RDAP server — returns an explicit notice instead of registration data
- Domain is not registered — returns an appropriate not-found response
- Invalid or malformed domain name input — may return an error
- Registry RDAP service is temporarily unavailable — may return a timeout or upstream error
- Network issues reaching the IANA bootstrap or registry endpoint

## How this service works

60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.

## Output

A structured JSON object containing the domain's creation, expiry, and last-changed dates; computed domain age and days-to-expiry; registrar name; EPP status codes; nameserver list; DNSSEC status; and abuse contact email/phone. If the TLD has no RDAP server, the response explicitly says so rather than falsely reporting the domain as unregistered.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "description": "The domain to look up. A full URL or an email address is accepted and reduced to its host."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "dnssec": {
   "type": "boolean"
  },
  "domain": {
   "type": "string"
  },
  "status": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "ageDays": {
   "type": "number"
  },
  "created": {
   "type": "string"
  },
  "expires": {
   "type": "string"
  },
  "registrar": {
   "type": "string"
  },
  "registered": {
   "type": "boolean"
  },
  "nameservers": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "expiresInDays": {
   "type": "number"
  },
  "rdapAvailable": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-registration-lookup-rdap-4c4c0f26/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from flat-rate-llm.kikoribera03.workers.dev](https://www.zero.xyz/host/flat-rate-llm.kikoribera03.workers.dev/llms.txt)