Domain WHOIS API: Get Registration, Expiry and Ownership Data in One Call

#api #whois #domains #seo

A domain's WHOIS data tells you everything: who owns it, when it was registered, when it expires, which nameservers it uses, and what registrar manages it.

Problem: Most WHOIS tools require manual lookups, and bulk WHOIS from traditional providers costs hundreds per month.

Domain WHOIS Lookup API does it in one call. REST endpoint, free tier, instant results.

What it does

POST /whois

Registrar name
Creation date
Expiration date
Updated date
Days until expiry
Status flags
Nameservers (up to 4)
Country
Organization
IP address (resolved)
Is expired? (boolean)

Use cases

Domain monitoring — track when your competitors' domains are about to expire
SEO audits — check nameserver config for domains you're auditing
Threat intel — identify newly registered domains from a registrar
Bulk domain validation — verify ownership before outreach
WHOIS scraping — avoid rate limits from manual WHOIS servers

Quick example

import requests

url = "https://domain-whois-lookup.p.rapidapi.com/whois"
headers = {
    "X-RapidAPI-Key": "YOUR_KEY",
    "Content-Type": "application/json"
}
payload = {"domain": "github.com"}

r = requests.post(url, json=payload, headers=headers)
print(r.json())

Response:

{
  "domain": "github.com",
  "registrar": "MarkMonitor, Inc.",
  "creation_date": "2007-10-09T18:20:50+00:00",
  "expiration_date": "2026-10-09T18:20:50+00:00",
  "updated_date": "2024-09-07T09:16:32+00:00",
  "days_until_expiry": 158,
  "status": ["clientDeleteProhibited", "clientTransferProhibited"],
  "name_servers": ["ns1.github.com", "ns2.github.com", "ns3.github.com"],
  "country": "US",
  "org": "GitHub, Inc.",
  "ip_address": "140.82.112.4",
  "is_expired": false
}

Real-world workflow

SEO agency scenario:

Get client's competitor list (50 domains)
Bulk WHOIS check: expiry dates, registrars, IP changes
Identify expiring domains → opportunities for acquisition
Track nameserver changes → detect migration before it goes live

Threat intel:

Monitor newly registered domains (WHOIS creation date < 7 days)
Cross-reference with your brand keywords
Flag suspicious lookalike domains early

Pricing

Plan	Price	Rate limit
BASIC	Free	50 req/hr
PRO	$9.99/mo	1,000 req/hr
ULTRA	$29.99/mo	10,000 req/hr

Try it

Domain WHOIS Lookup on RapidAPI

No credit card for free tier. Live in 30 seconds.

Built because WHOIS data is foundational for domain operations — why pay $0.50/lookup when you can get 50,000/month on a single subscription?

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