Domain Info & WHOIS Scraper - DNS, SSL, Tech Stack Detection

Extract comprehensive domain intelligence: WHOIS registration data, DNS records, SSL certificate details, technology stack, and HTTP metadata — all from free public APIs with no API key required.

Use Cases

• Competitor Analysis: Discover what technologies your competitors use (WordPress, Shopify, Next.js, Vercel, Cloudflare, etc.)
• Lead Qualification: Check if a company's domain is active, when it was registered, and what stack they run
• Domain Research: Bulk WHOIS lookups for domain age, registrar, expiration dates
• Sales Intelligence: Identify prospects using specific technologies to target relevant offers
• Due Diligence: Verify domain ownership details, registration history, and server infrastructure
• SEO Research: Check nameservers, hosting providers, and CDN usage across competitor domains

What It Extracts

Field	Description
registrar	Domain registrar name
creationDate	When the domain was registered
expirationDate	When the domain expires
updatedDate	Last update date
registrantOrg	Registrant organization
registrantCountry	Registrant country
domainStatus	RDAP status codes
nameservers	DNS nameservers
ipAddress	Primary A record IP
aRecords	All A records
aaaaRecords	IPv6 AAAA records
mxRecords	Mail exchange records
txtRecords	TXT records (SPF, DMARC, etc.)
nsRecords	Name server records
httpStatus	HTTP response code
redirectUrl	Final redirect URL
responseTime	Response time in ms
serverSoftware	Server header (nginx, Apache, etc.)
poweredBy	X-Powered-By header
title	Page title
description	Meta description
sslIssuer	SSL certificate issuer
sslExpiry	SSL certificate expiry
techStack	Detected technologies

Technology Detection

Detects 30+ technologies including:

• CMS: WordPress, Wix, Squarespace, Webflow
• E-commerce: Shopify
• Frameworks: Next.js, Nuxt.js, Gatsby, React, Vue.js, Angular
• Hosting: Vercel, Netlify, AWS, Heroku, Cloudflare
• Analytics: Google Analytics, Google Tag Manager, Hotjar, Mixpanel
• CSS: Bootstrap, Tailwind CSS
• Chat/Support: Intercom, Zendesk, Drift, Crisp
• Payments: Stripe
• CRM: HubSpot, Segment

Input

{
  "domains": ["google.com", "github.com", "shopify.com"],
  "maxDomains": 100
}

Output Example

{
  "domain": "google.com",
  "registrar": "MarkMonitor Inc.",
  "creationDate": "1997-09-15T04:00:00Z",
  "expirationDate": "2028-09-14T04:00:00Z",
  "ipAddress": "142.250.185.78",
  "mxRecords": ["10 smtp.google.com."],
  "nameservers": ["ns1.google.com", "ns2.google.com"],
  "httpStatus": 200,
  "serverSoftware": "gws",
  "title": "Google",
  "techStack": ["Google Analytics", "Google Tag Manager"],
  "sslIssuer": "Google Trust Services",
  "scrapedAt": "2026-01-01T00:00:00.000Z"
}

Data Sources

• WHOIS: RDAP protocol (rdap.org) — free, no API key
• DNS: Google Public DNS API (dns.google) — free, no API key
• HTTP/SSL: Direct HTTP request to domain — free
• Tech Detection: HTML pattern matching — free

Performance

• ~2-5 seconds per domain
• 256MB memory is sufficient for 100+ domains
• Parallel WHOIS + DNS + HTTP lookups per domain