What problem does it solve? Gathering infrastructure intelligence about a domain—its subdomains, SSL certificate status, registration details, and DNS records—normally requires multiple separate tools or paid APIs. This Skill consolidates all passive domain reconnaissance into a single CLI that runs with only the Python standard library and no API keys. ## Core Features & Use Cases - Subdomain Discovery: Enumerate subdomains from Certificate Transparency logs via crt.sh, with expired-certificate filtering. - 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 estimate domain availability from passive DNS, WHOIS, and SSL signals. - 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 SSL expiry and WHOIS history of a competitor's domain for research. ## Quick Start Ask the AI to find all subdomains of example.com and check when its SSL certificate expires using the domain intelligence script.
