domain-intel

domain-intel is a skill for Claude Code, Codex from sairam0424/MindForge. It costs 43 tokens per session (1,105 once invoked), scanned A, a copy of domain-intel, MIT.

A command-line toolkit for passive domain research, meaning it gathers publicly available information without actively probing systems. It uses Python’s standard library and needs no API keys.

In plain words
What is it for?
Use it to find subdomains, inspect SSL certificates, look up WHOIS registration details, read DNS records, check whether a domain may be available, or analyze several domains together.
Why use it?
It gathers common domain details in one workflow, avoiding separate lookups for certificates, DNS, ownership records, subdomains, and availability.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 SKILL_DIR/scripts/domain_intel.py subdomains example.com.

Good fit Use it to find subdomains, inspect SSL certificates, look up WHOIS registration details, read DNS records, check whether a domain may be available, or analyze several domains together.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/sairam0424/MindForge
agentmods
npx agentmods add skills/sairam0424/mindforge/domain-intel

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for domain-intel

README.md
[![agentmods](https://agentmods.dev/badge/skills/sairam0424/mindforge/domain-intel.svg)](https://agentmods.dev/skills/sairam0424/mindforge/domain-intel)
Your own site
<a href="https://agentmods.dev/skills/sairam0424/mindforge/domain-intel"><img src="https://agentmods.dev/badge/skills/sairam0424/mindforge/domain-intel.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,105 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 83% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00043 $0.01105
Opus 5 $0.00022 $0.00553
Sonnet 5 $0.00009 $0.00221
Haiku 4.5 $0.00004 $0.00111

Measured 7d ago against content hash 52369c7b3681, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

domain-intel scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Use `Bash` with `curl -I`** for a simple "is this URL reachable" check
Origin

This is a copy

83% identical to domain-intel — 38 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agent/skills/domain-intel/SKILL.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Domain Intelligence — Passive OSINT

Passive domain reconnaissance using only Python stdlib. Zero dependencies. Zero API keys. Works on Linux, macOS, and Windows.

Helper script

This skill includes scripts/domain_intel.py — a complete CLI tool for all domain intelligence operations.

# Subdomain discovery via Certificate Transparency logs
python3 SKILL_DIR/scripts/domain_intel.py subdomains example.com

# SSL certificate inspection (expiry, cipher, SANs, issuer)
python3 SKILL_DIR/scripts/domain_intel.py ssl example.com

# WHOIS lookup (registrar, dates, name servers — 100+ TLDs)
python3 SKILL_DIR/scripts/domain_intel.py whois example.com

# DNS records (A, AAAA, MX, NS, TXT, CNAME)
python3 SKILL_DIR/scripts/domain_intel.py dns example.com

# Domain availability check (passive: DNS + WHOIS + SSL signals)
python3 SKILL_DIR/scripts/domain_intel.py available coolstartup.io

# Bulk analysis — multiple domains, multiple checks in parallel
python3 SKILL_DIR/scripts/domain_intel.py bulk example.com github.com google.com
python3 SKILL_DIR/scripts/domain_intel.py bulk example.com github.com --checks ssl,dns

SKILL_DIR is the directory containing this SKILL.md file. All output is structured JSON.

Available commands

Command What it does Data source
subdomains Find subdomains from certificate logs crt.sh (HTTPS)
ssl Inspect TLS certificate details Direct TCP:443 to target
whois Registration info, registrar, dates WHOIS servers (TCP:43)
dns A, AAAA, MX, NS, TXT, CNAME records System DNS + Google DoH
available Check if domain is registered DNS + WHOIS + SSL signals
bulk Run multiple checks on multiple domains All of the above

When to use this vs built-in tools

  • Use this skill for infrastructure questions: subdomains, SSL certs, WHOIS, DNS records, availability
  • Use WebSearch for general research about what a domain/company does
  • Use WebFetch to get the actual content of a webpage
  • Use Bash with curl -I for a simple "is this URL reachable" check

Read the full file on GitHub · 97 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 97 lines · 43 tokens per session scan A 52369c7b3681

Subscribe to this mod's changes

domain-intel is a skill published in the GitHub repository sairam0424/MindForge (0 stars, last pushed 3d ago), licensed MIT. It adds 43 tokens to every session and 1,105 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 83% identical to domain-intel, differing in 38 lines, and is treated as a copy.

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