# RDAP Domain Registration Lookup

> RDAP Domain Registration Lookup is a paid API for AI agents from x402-portfolio.x402iom.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Retrieves modern WHOIS domain registration data via RDAP, including registrar, creation/expiry dates, status flags, nameservers, and DNSSEC info.

## Facts

- Endpoint: GET https://x402-portfolio.x402iom.workers.dev/rdap/:var1
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rdap-domain-registration-lookup-b6464fbb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AHN_CsmimnVAy4zyd1ZF3

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 rdap-domain-registration-lookup-b6464fbb
```

Example prompt: Can you look up the RDAP registration data for openai.com — I want to know the registrar, when it was created, when it expires, its current status, nameservers, and whether DNSSEC is enabled?

## When to prefer this

Choose this endpoint when you need structured, machine-readable domain registration metadata (registrar, dates, status, nameservers, DNSSEC) — especially when you want a modern RDAP response rather than raw legacy WHOIS text. Ideal for domain monitoring workflows, cybersecurity investigations, pre-acquisition due diligence, or any automation that needs to parse domain lifecycle data reliably.

## Known failure modes

- Domain not found: returns error if the domain does not exist or has no RDAP record
- Invalid domain format: malformed domain strings may return a validation error
- Registry unavailability: some TLDs may not support RDAP, resulting in no data returned
- Rate limiting: excessive calls may be throttled
- Redacted data: registrant contact info is often redacted for privacy (GDPR); only technical/registrar data is returned

## How this service works

Domain registration data (modern WHOIS) via RDAP: registrar, created/expiry dates, status, nameservers, DNSSEC.

## Output

Returns structured domain registration data including: registrar name, domain creation date, last updated date, expiry/expiration date, domain status flags (e.g. clientTransferProhibited), list of nameservers, and DNSSEC signing status — sourced from the RDAP protocol, the modern successor to WHOIS.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rdap-domain-registration-lookup-b6464fbb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-portfolio.x402iom.workers.dev](https://www.zero.xyz/host/x402-portfolio.x402iom.workers.dev/llms.txt)