Free WHOIS & Domain Lookup API Comparison 2026

const res = await fetch(
  'https://www.whoisxmlapi.com/whoisserver/WhoisService?' +
  'apiKey=YOUR_KEY&domainName=example.com&outputFormat=JSON'
);
const data = await res.json();
console.log(data.WhoisRecord.registrarName);
console.log(data.WhoisRecord.expiresDate);
console.log(data.WhoisRecord.nameServers.hostNames);

import requests

resp = requests.get(
    "https://www.whoisxmlapi.com/whoisserver/WhoisService",
    params={
        "apiKey": "YOUR_KEY",
        "domainName": "example.com",
        "outputFormat": "JSON"
    }
)
data = resp.json()["WhoisRecord"]
print(f"Registrar: {data['registrarName']}")
print(f"Expires: {data['expiresDate']}")
print(f"Nameservers: {data['nameServers']['hostNames']}")

const res = await fetch('https://rdap.org/domain/example.com');
const data = await res.json();

// Extract registration dates
const events = data.events || [];
const created = events.find(e => e.eventAction === 'registration');
const expires = events.find(e => e.eventAction === 'expiration');

console.log(`Created: ${created?.eventDate}`);
console.log(`Expires: ${expires?.eventDate}`);
console.log(`Status: ${data.status?.join(', ')}`);

import requests

resp = requests.get("https://rdap.org/domain/example.com")
data = resp.json()

events = {e["eventAction"]: e["eventDate"] for e in data.get("events", [])}
print(f"Created: {events.get('registration')}")
print(f"Expires: {events.get('expiration')}")
print(f"Status: {', '.join(data.get('status', []))}")
print(f"Nameservers: {[ns['ldhName'] for ns in data.get('nameservers', [])]}")

const res = await fetch(
  'https://api.frostbyte.sh/v1/dns/lookup?domain=example.com',
  { headers: { 'X-API-Key': 'YOUR_KEY' } }
);
const data = await res.json();

// Get nameservers, MX records, and more
console.log('NS:', data.ns);
console.log('A:', data.a);
console.log('MX:', data.mx);
console.log('TXT:', data.txt);

import requests

resp = requests.get(
    "https://api.frostbyte.sh/v1/dns/lookup",
    params={"domain": "example.com"},
    headers={"X-API-Key": "YOUR_KEY"}
)
data = resp.json()
print(f"Nameservers: {data.get('ns')}")
print(f"A Records: {data.get('a')}")
print(f"MX Records: {data.get('mx')}")