Domain intel
Passive domain reconnaissance using Python stdlib. Use this skill for subdomain discovery, SSL certificate inspection, WHOIS lookups, DNS records, domain availability checks, and bulk multi-domain analysis. No API keys required. Triggers on requests like "find subdomains", "check ssl cert", "whois lookup", "is this domain available", "bulk check these domains".From its SKILL.md
npx -y skills add kevinnft/ai-agent-skills --skill domain-intelAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.
One thing to look at
- 13 stars13 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.
What its file declares
Copied from the file, not written here
The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.
SKILL.md
1.1 KB, 176 tokens by cl100k_base, as published. Nobody here has run it
Passive domain intelligence using only Python stdlib and public data sources. Zero dependencies. Zero API keys. Works out of the box.
Capabilities
- Subdomain discovery via crt.sh certificate transparency logs
- Live SSL/TLS certificate inspection (expiry, cipher, SANs, TLS version)
- WHOIS lookup — supports 100+ TLDs via direct TCP queries
- DNS records: A, AAAA, MX, NS, TXT, CNAME
- Domain availability check (DNS + WHOIS + SSL signals)
- Bulk multi-domain analysis in parallel (up to 20 domains)
Data Sources
- crt.sh — Certificate Transparency logs
- WHOIS servers — Direct TCP to 100+ authoritative TLD servers
- Google DNS-over-HTTPS — MX/NS/TXT/CNAME resolution
- System DNS — A/AAAA records
What ships with it
Read from the repository
Just SKILL.md. No reference files, no scripts.