What problem does it solve? Gathering infrastructure intelligence about domains—subdomains, SSL certificate status, WHOIS registration, and DNS records—normally requires multiple paid tools or API keys. This Skill performs all of these passive OSINT checks using only the Python standard library, with zero dependencies and zero API keys. ## Core Features & Use Cases - Subdomain Discovery: Enumerate subdomains from Certificate Transparency logs via crt.sh, filtering out expired certificates. - SSL & WHOIS Inspection: Check TLS certificate expiry, cipher suites, and SANs, plus registrar, creation, and expiration dates across 100+ TLD WHOIS servers. - DNS & Availability Checks: Resolve A, AAAA, MX, NS, TXT, and CNAME records, and heuristically determine whether a domain is available for registration. - Bulk Analysis: Run multiple checks across up to 20 domains in parallel with structured JSON output. - Use Case: Before acquiring a domain for a new project, run the availability check on several candidates, then inspect the SSL expiry dates of competitor domains in one bulk command. ## Quick Start Ask the AI to find all subdomains of example.com and check when its SSL certificate expires using the domain-intel skill.
