Amass

Q: What is a Claude Code skill and how does the Amass skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Amass is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: web-security · Last updated: 2026-06-13

OWASP Amass for in-depth DNS enumeration, subdomain discovery, and network mapping with active and passive modes. Use when: comprehensive subdomain enumeration, ASN and IP range mapping, attack surface discovery, building full network topology of a target organization.

About this skill (catalog notes)

Amass includes pricing or quota commentary; 8 code blocks for direct copy-paste. The SKILL.md runs to about 995 words, in the catalog's typical mid-range.

Source: terminalskills.io
License: Apache-2.0
Original author: TerminalSkills
Indexed lastmod: 2026-06-13
Catalog position: Security · web-security
Indexed related skills: 10

How Amass fits the catalog

Amass sits in the Security category under the web-security sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

What this skill does

Amass is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/amass/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when: comprehensive subdomain enumeration, ASN and IP range mapping, attack surface discovery, building full network topology of a target organization.

Who uses this skill

The Amass Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/amass
curl -L https://claudskills.com/skills/amass/SKILL.md \
  -o ~/.claude/skills/amass/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/amass/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/amass/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\amass\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Amass Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/amass/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Amass skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Amass skill?

Use Amass when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Amass" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Amass skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Amass is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/TerminalSkills/skills/blob/77fa0150aa0921f892420d3ec2a9204e3124b71e/skills/amass/SKILL.md
License: Apache-2.0
Author: TerminalSkills
Website: https://terminalskills.io/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

TerminalSkills. (2026). Amass [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/amass/

BibTeX

@misc{amass-2026,
  author    = {TerminalSkills},
  title     = {Amass [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/amass/}
}

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Badge

[![ClaudSkills](https://claudskills.com/badge/amass.svg)](https://claudskills.com/skills/amass/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

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Browse all Security skills → Top 100 skills

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