What problem does it solve? Gathering infrastructure intelligence about a domain—its subdomains, SSL certificate status, registration details, 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 issuers, 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 if a domain is available for registration using 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 candidates like coolstartup.io, then inspect SSL expiry dates across your existing domain portfolio in one bulk command. ## Quick Start Ask the agent to find all subdomains of example.com and check when its SSL certificate expires using the domain intelligence skill.
