domain-intel

domain-intel is a skill for Claude Code, Codex from nobodyohm-web/Thot. It costs 20 tokens per session (1,132 once invoked), scanned A, a copy of domain-intel, MIT.

A passive domain-research tool for examining subdomains, SSL certificates, WHOIS records, and DNS records without actively probing a site.

In plain words
What is it for?
Use it to discover subdomains, inspect certificate details, look up registration information, check DNS records, and assess domain availability.
Why use it?
It gathers basic public information about a domain in one place while avoiding intrusive scanning.

Skill for Claude CodeCodex

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

Good fit Use it to discover subdomains, inspect certificate details, look up registration information, check DNS records, and assess domain availability.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nobodyohm-web/thot/domain-intel
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add nobodyohm-web/Thot --skill domain-intel
Clone the repo
git clone --depth 1 https://github.com/nobodyohm-web/Thot

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/nobodyohm-web/thot/domain-intel.svg)](https://agentmods.dev/skills/nobodyohm-web/thot/domain-intel)
Your own site
<a href="https://agentmods.dev/skills/nobodyohm-web/thot/domain-intel"><img src="https://agentmods.dev/badge/skills/nobodyohm-web/thot/domain-intel.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,132 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 100% 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 $0.00020 $0.01132
Opus 5 $0.00010 $0.00566
Sonnet 5 $0.00004 $0.00226
Haiku 4.5 $0.00002 $0.00113

Measured 4d ago against content hash a212e30bced6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, 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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/domain_intel.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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

This is a copy

100% identical to domain-intel — 0 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.

hermes/optional-skills/research/domain-intel/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 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
python SKILL_DIR/scripts/domain_intel.py subdomains example.com

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

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

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

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

# Bulk analysis — multiple domains, multiple checks in parallel
python SKILL_DIR/scripts/domain_intel.py bulk example.com github.com google.com
python 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 web_search for general research about what a domain/company does
  • Use web_extract to get the actual content of a webpage
  • Use terminal with curl -I for a simple "is this URL reachable" check

Read the full file on GitHub · 105 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 105 lines · 20 tokens per session scan A a212e30bced6

Subscribe to this mod's changes

domain-intel is a skill published in the GitHub repository nobodyohm-web/Thot (0 stars, last pushed 13d ago), licensed MIT. It adds 20 tokens to every session and 1,132 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to domain-intel, differing in 0 lines, and is treated as a copy.

Related

Other skills, from other repositories

duckduckgo-search

Free keyless web, news, and image search via ddgs.

NousResearch/hermes-agent · 19 tokens

subagent-driven-development

Execute plans via delegatetask subagents (2-stage review).

NousResearch/hermes-agent · 17 tokens

mem0-oss-to-platform

Plan and then execute a migration of a project from the mem0 open-source / self-hosted SDK (the local Memory class) to the mem0 Platform / hosted / managed SDK (the MemoryClient class). Use this whenever a developer wants to move, switch, or migrate their mem0 usage off OSS/self-hosted to the hosted API — e.g.…

mem0ai/mem0 · 273 tokens

auditing-subgroup-fairness

Audit an OpenMed NER or de-identification model for performance disparities across demographic subgroups (sex, age band, race/ethnicity when available) using openmed.eval.fairnessreport. Use when the user wants per-subgroup recall and leakage, wants to check whether de-identification under-protects a group, wants to…

maziyarpanahi/openmed · 148 tokens

rulesync

Generates and syncs AI rule configuration files (.cursorrules, CLAUDE.md, copilot-instructions.md) across 20+ coding tools from a single source. Use when syncing AI rules, running rulesync commands, importing or generating rule files, or managing shared AI coding configurations.

dyoshikawa/rulesync · 64 tokens

infographic-template-updater

Update template catalogs and UI prompts after adding new infographic templates (src/templates/.ts), including SKILL.md template list, site gallery template mappings, and the AIPlayground prompt list.

antvis/Infographic · 43 tokens