domain

domain is a skill for Claude Code from coreyhaines31/makerskills. It costs 232 tokens per session (6,273 once invoked), scanned A, original, MIT.

A workflow for finding potentially available .com domain names for a new project and checking related ownership and trademark information.

In plain words
What is it for?
Use it to brainstorm names, check domain availability and aftermarket listings, screen USPTO trademarks, and check social handles.
Why use it?
It helps avoid choosing a name before knowing whether the domain, social handle, or trademark is already taken.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: positional $N argument.

Part of the makerskills plugin — 21 skills shipped together

Good fit Use it to brainstorm names, check domain availability and aftermarket listings, screen USPTO trademarks, and check social handles.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/coreyhaines31/makerskills/domain
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 coreyhaines31/makerskills --skill domain
Clone the repo
git clone --depth 1 https://github.com/coreyhaines31/makerskills

Made for: Claude Code.

Or install makerskills, the plugin that ships this one along with the rest of its 21 skills.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/coreyhaines31/makerskills/domain/github.svg)](https://agentmods.dev/skills/coreyhaines31/makerskills/domain)
Your own site
<a href="https://agentmods.dev/skills/coreyhaines31/makerskills/domain"><img src="https://agentmods.dev/badge/skills/coreyhaines31/makerskills/domain/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for domain

Your own site · 80×15
<a href="https://agentmods.dev/skills/coreyhaines31/makerskills/domain"><img src="https://agentmods.dev/badge/skills/coreyhaines31/makerskills/domain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 232 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,273 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 6 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 141
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium MCP Rug Pull · line 152
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 153
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 154
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium Data Exfiltration · line 186
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 354
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
How audits are shown
Origin original No closer match found 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 $0.00232 $0.06273
Opus 5 $0.00116 $0.03136
Sonnet 5 $0.00046 $0.01255
Haiku 4.5 $0.00023 $0.00627

Measured 9d ago against content hash 5a08f9468770, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

domain 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 9d 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.

code=$(curl -sL -o /dev/null -w "%{http_code}" -A "$UA" "https://rdap.org/domain/$domain")
skills/domain/SKILL.md · 382 lines

How it starts

The opening of the file, as written. The whole thing — 382 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/domain — Brainstorm + check available .com domains

Multi-tool workflow to find a great, affordable, available .com for a new project. Built on Laura Roeder's rule: work backwards from what's actually available — don't fall in love with a name first (source).

Defaults to .com only. Only deviate (.dev, .co, .io, .ai) if the project is dev-tooling-only or the user explicitly asks.

Step 0 — Environment checks

Verify these before proceeding (surface install commands if missing, don't try to install silently):

Tool Check Install if missing
Vercel CLI vercel whoami npm i -g vercel && vercel login
whois which whois brew install whois (macOS)
Domainr API key [ -n "$DOMAINR_API_KEY" ] Get free key at rapidapi.com/domainr/api/domainr, add to ~/.zshenv
Namecheap API [ -n "$NAMECHEAP_API_KEY" ] && [ -n "$NAMECHEAP_API_USER" ] && [ -n "$NAMECHEAP_CLIENT_IP" ] Enable API at ap.www.namecheap.com/settings/tools/apiaccess/, add 3 env vars, whitelist your IP

Domainr + Namecheap are optional — the workflow degrades gracefully without them (skips the corresponding cross-check steps).

Step 1 — Set the budget

Ask: what would you pay for a great .com on this project? Anchor defaults:

Budget What it buys
$0 Only unregistered domains (rare for anything good)
$250–$1k Aftermarket sweet spot (HugeDomains is the standout — Laura found "a ton of great .com's available for less than $1k")
$1k–$2k Laura's Paperbell.com range — plenty of brandable options
$2k+ Premium

Filter all candidates to under-budget BEFORE falling in love.

Step 2 — Seed words for "branded" combos

Ask what the product does + the feeling/category. Brainstorm 20–40 candidate domains using these preferences (in order):

  1. Two real words mashed together ← preferred (Helpscout, RightMessage, ConvertKit, Paperbell, Mailchimp). Easy to spell, remember, google.
  2. Prefix/suffix the bare word — grab the .com when the bare word is taken or over budget. "I love word X, X.com is gone, what qualifier unlocks the .com?"
    • Modern prefixes (B2B SaaS feel): try (TryGamma, TryRoam), use (UseMotion, UseChalk), with (WithCove, WithFrame), join (JoinHomebase, JoinHonor)
    • Classic prefixes (still work): get (GetMagic, GetResponse), go (GoCardless, GoFundMe), hey (HeyMarvin, HeyHenry), the (TheBrowserCompany, TheDyrt — editorial vibe)
    • Dated — avoid unless intentional: my (MyFitnessPal), meet (MeetEdgar)
    • Suffixes: +ly (Calendly, Grammarly — battle-tested but reads "2015 startup"), +ify (Spotify, Shopify — rare, hard to land authentically), +labs (AI/research positioning), +hq / +app (mostly informal)
    • Watch: trademark collision (UseSlack.com is a brand violation even if registrable); popular bare words often have try/use/get/join variants pre-grabbed by the same owner; longer URLs cost spelling-on-phone bandwidth
    • Full grid: if the user loves a bare word, generate all try/use/with/join/get/go/hey/the + word and word + ly/ify/labs/hq/app in one shot — ~15 variants
  3. One real word, slightly modified (Trello, Pinterest, Lyft) — fine.
  4. Made-up-sounds (Sunsama, Besedky) — only as fallback. Notoriously hard to remember.
  5. Common single-word objects (Clubhouse, Spoke, Blush, Finder) — AVOID. Ungoogleable, .com always taken, collides with other products.

Read the full file on GitHub · 382 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. 9d ago First seen · 382 lines · 232 tokens per session scan A 5a08f9468770

Subscribe to this mod's changes

domain is a skill published in the GitHub repository coreyhaines31/makerskills (795 stars, last pushed 4d ago), licensed MIT. It adds 232 tokens to every session and 6,273 once invoked, about $0.0012 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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