How to Build a Domain Intelligence Tool in JavaScript (DNS + Geolocation + Screenshots)

Before you sign a contract with a vendor, onboard a new partner, or click a suspicious link, you probably want to know: who is behind this domain? Tools like DomainTools and SecurityTrails charge $99+/month for this. But you can build your own domain intelligence tool in under 120 lines of JavaScript using free APIs — and it runs from the command line in seconds. In this tutorial, we'll build a CLI that takes any domain and returns: DNS records (A, MX, NS, TXT, CNAME) WHOIS data (registrar, creation date, expiration) Server geolocation (country, city, ISP, hosting provider) A visual screenshot of the live site A risk assessment based on domain age, hosting, and DNS configuration The result is a clean report you can use for vendor vetting, phishing analysis, or sales prospecting. What We're Building $ node domain-intel.js stripe.com ╔══════════════════════════════════════════════╗ ║ DOMAIN INTELLIGENCE REPORT: stripe.com ║ ╚══════════════════════════════════════════════╝ DNS Records A: