/domain namespace · APlicious

Domain API — WHOIS, DNS, SSL certificates, and email security in one key

The /domain namespace covers registration lookup (RDAP-based WHOIS), DNS and email configuration, and security posture checks — 24 endpoints behind one key.

24domain endpoints

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GET /api/v1/domain/whois

const res = await fetch(
  'https://aplicious.com/api/v1/domain/whois?domain=google.com',
  { headers: { 'X-API-Key': 'lapi_live_••••' } }
);
const { data } = await res.json();
// { domain: "google.com", registrar: "MarkMonitor Inc.", created_date: "1997-09-15", ... }

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What's included in /domain

RDAP-based WHOIS

Modern, structured registration data lookup — the same underlying call powers both /whois and /rdap.

DNS and email config

Full DNS record lookup plus SPF, DMARC, and email configuration checks for any domain.

SSL certificate checks

Verify certificate validity and expiry before they become a production incident.

Security posture

Security header checks, subdomain scanning, and domain reputation in the same namespace.

Domain age and registrar info

Real trust signals — a domain registered yesterday is a different risk profile than one from 2010.

Start using the WHOIS API today

Free tier — 500 calls/month, no credit card. Upgrade when you need more.

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Frequently asked questions

What's the difference between /whois and /rdap?

They resolve through the same underlying RDAP lookup — we expose both paths because 'WHOIS' is the term most developers still search for.

Can I check SPF/DMARC for a domain I don't own?

Yes — these are public DNS records, the same checks any mail server performs before trusting a message.

Does this include a security audit?

It covers SSL validity, security headers, and subdomain exposure — enough for a basic security posture check, not a full penetration test.

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