Whois Lookup API

Network tool

POST https://api.findutils.com/api/tools/whois-lookup/execute

Return WHOIS-style registration data for a domain from the public RDAP service: registrar, creation, update and expiry dates, EPP status codes, nameservers and DNSSEC state.

Open the tool Try it

Request body

application/json

domain

string required

Registered domain name, e.g. "example.com". A URL is accepted; only the hostname is used.

Example arguments

Verified

{
  "domain": "example.com"
}

Cidr Calculate Compute network / broadcast / first-last host / subnet mask / hosts count for a CIDR (e.g.
Cookie Analyzer Analyze Set-Cookie header strings and return a per-cookie list of security issues, an overall 0-100 score, and recommendations.
Curl To Code Returns source code that performs the same HTTP request as a cURL command, in JavaScript (fetch), Python (requests), PHP (cURL), Go…
Dns Lookup Return the DNS records of a domain for one record type (A, AAAA, CNAME, MX, TXT, NS or SOA).
Dns Security Scanner Return a DNS security report for a domain: SPF, DMARC, MX and CAA records with issues, a 0-100 score, a letter grade and recommendations.
Email Security Checker Return an email-security report for the domain of an email address: MX, SPF, DKIM (common selectors), DMARC, MTA-STS, TLS-RPT and BIMI…

curl -X POST https://api.findutils.com/api/tools/whois-lookup/execute \
  -H "Content-Type: application/json" \
  -d '{
    "domain": "example.com"
  }'

const response = await fetch('https://api.findutils.com/api/tools/whois-lookup/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"domain":"example.com"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/whois-lookup/execute",
    json={"domain":"example.com"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/whois-lookup/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"domain":"example.com"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call whois_lookup from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: whois-lookup
MCP name: whois_lookup
Category: Network
Machine-readable: openapi.json · markdown.md

This tool fetches a fixed, hard-coded public upstream, never a private host. Results depend on that upstream.

Request body

Example arguments

More Network tools

More to explore