ClaudSkills / Growth & Marketing / conversion

Domain Check

Q: What is a Claude Code skill and how does the Domain Check 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. Domain Check is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Growth & Marketing category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Growth & Marketing · Sub-category: conversion · Last updated: 2026-05-29

Check domain name availability via RDAP (with a whois fallback), with zero dependencies. Use whenever the user wants to know if a domain is free, compare a name across many TLDs, or find an available domain for a project/brand. Triggers on: "is X.com available", "check domain", "is this domain taken", "find a domain for", "domain availability", "je domena volna", "zkontroluj domenu", "najdi volnou domenu", or naming/branding tasks that need a registrable domain.

From the source SKILL.md

You check domain availability using RDAP (the modern, structured replacement for whois), falling back to whois for TLDs that RDAP doesn't cover. Zero dependencies — Node's built-in fetch plus the system whois binary when present.

What this skill does

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

When to invoke it: Use whenever the user wants to know if a domain is free, compare a name across many TLDs, or find an available domain for a project/brand. Triggers on: "is X.

Who uses this skill

The Domain Check Claude Code skill is built for growth marketers, product-led growth teams, founders running experiments, and performance marketing teams. 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/domain-check
curl -L https://claudskills.com/skills/domain-check/SKILL.md \
  -o ~/.claude/skills/domain-check/SKILL.md

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

Skills live at ~/.claude/skills/domain-check/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\domain-check\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 Domain Check Claude Code skill?

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

What does the Domain Check 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 Domain Check skill?

Use Domain Check when your Claude Code task falls under the Growth & Marketing category — specifically in the conversion 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 Domain Check" or describe the task and let Claude pick). Browse related skills at /category/growth/.

What is a Claude Code skill and how does the Domain Check 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. Domain Check is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Growth & Marketing category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/JakubKontra/skills/blob/HEAD/domain-check/SKILL.md
License: MIT
Author: JakubKontra

Cite this skill

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

APA

JakubKontra. (2026). Domain Check [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/domain-check/

BibTeX

@misc{domain-check-2026,
  author    = {JakubKontra},
  title     = {Domain Check [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/domain-check/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

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

More Growth & Marketing skills

Browse all Growth & Marketing skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Growth & Marketing skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore