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domain-intel

Passive domain reconnaissance using Python stdlib.

Skill by pvbang

IndexedMIT
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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/pvbang-domain-intel

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

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".

Use cases: backend

Reviews

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
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Install scripts
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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/domain-intel

What's inside

Skill name
domain-intel
Description
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".
License
MIT
Instructions
20 lines in SKILL.md · view on GitHub

Agent Skills spec issues

  • name: "domain-intel" does not match folder "domain"

Files (2)

  • DESCRIPTION.md
  • SKILL.md

SKILL.md (first lines)

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

From pvbang/nexus, MIT.

More from pvbang/nexus

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Last commit (this folder)
Jul 9, 2026 (3 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
Repository
github.com/pvbang/nexus
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

More from pvbang

Cite this page

domain-intel skill. Agent Mart. https://agentmart.dev/skills/pvbang-domain-intel (last updated 2026-10-24)