How do I install the Checkname skill?

Run npx skillmds@latest add nvk/checkname in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Checkname safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Checkname?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Checkname free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Checkname?

nvk (@nvk) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Checkname by nvk — Agent Skill

Name: Checkname
Author: nvk

Checkname

Check domain and social namespace availability for candidate names and handles. Use when someone needs fast triage on whether a brand, product, or handle appears to be available across domains and common social platforms. Prefer the bundled checkname script and report uncertain cases honestly.

nvk 72136a1 2 files · 3.6 KB Updated Sep 17, 2026

File contents

checkname

Codex Plugin Notes

Codex plugins do not register Claude-style slash commands. In Codex, the canonical explicit invocation is:

@checkname northstar
@checkname "North Star Labs" --trademark-uspto

If @checkname is present, treat it as an explicit request to use this skill. Do not fall back to generic repo exploration unless the bundled checker itself fails or the plugin is not installed/enabled in the current Codex session.

Purpose

This skill helps an agent answer:

Is brandname.com likely available?
Is @brandname taken on GitHub, X, Instagram, or YouTube?
Which spelling variant is the cleanest cross-platform option?

The goal is fast namespace triage, not legal clearance.

Use the checker script

Run the bundled checker with structured output first:

python3 ../../scripts/checkname.py "Candidate Name" --json

You can narrow the scope:

python3 ../../scripts/checkname.py "Candidate Name" \
  --variants candidate,candidate-name,getcandidate \
  --tlds com,io,ai,org \
  --platforms github,x,instagram,youtube,tiktok,bluesky,reddit,linkedin \
  --json

If the user wants a human-readable report:

python3 ../../scripts/checkname.py "Candidate Name" --markdown

If the user wants federal trademark triage too:

python3 ../../scripts/checkname.py "Candidate Name" --trademark-uspto --json

That mode should be described as:

official USPTO search-query generation
manual review support
not trademark clearance

Interpretation rules

Prefer taken and available only when the signal is clear.
Treat uncertain as unresolved. Do not quietly convert it into available.
Favor variants that are consistent across:
- primary domain
- GitHub
- X
- Instagram
- YouTube
If one platform blocks automated checks, tell the user exactly that.
Always state:
- this is namespace triage
- final confirmation should happen in the registrar or signup flow
- this is not trademark clearance

Recommended output

Return:

a 1-2 sentence recommendation
the best 2-3 candidate variants
a compact domain table
a compact platform table
a short unresolved list

Supported platforms

See references/platforms.md.

---name: checknamedescription: Check domain and social namespace availability for candidate names and handles. Use when someone needs fast triage on whether a brand, product, or handle appears to be available across domains and common social platforms. Prefer the bundled checkname script and report uncertain cases honestly.---# checkname## Codex Plugin NotesCodex plugins do not register Claude-style slash commands. In Codex, thecanonical explicit invocation is:```text@checkname northstar@checkname "North Star Labs" --trademark-uspto```If `@checkname` is present, treat it as an explicit request to use this skill.Do not fall back to generic repo exploration unless the bundled checker itselffails or the plugin is not installed/enabled in the current Codex session.## PurposeThis skill helps an agent answer:- Is `brandname.com` likely available?- Is `@brandname` taken on GitHub, X, Instagram, or YouTube?- Which spelling variant is the cleanest cross-platform option?The goal is fast namespace triage, not legal clearance.## Use the checker scriptRun the bundled checker with structured output first:```bashpython3 ../../scripts/checkname.py "Candidate Name" --json```You can narrow the scope:```bashpython3 ../../scripts/checkname.py "Candidate Name" \ --variants candidate,candidate-name,getcandidate \ --tlds com,io,ai,org \ --platforms github,x,instagram,youtube,tiktok,bluesky,reddit,linkedin \ --json```If the user wants a human-readable report:```bashpython3 ../../scripts/checkname.py "Candidate Name" --markdown```If the user wants federal trademark triage too:```bashpython3 ../../scripts/checkname.py "Candidate Name" --trademark-uspto --json```That mode should be described as:- official USPTO search-query generation- manual review support- not trademark clearance## Interpretation rules1. Prefer `taken` and `available` only when the signal is clear.2. Treat `uncertain` as unresolved. Do not quietly convert it into `available`.3. Favor variants that are consistent across: - primary domain - GitHub - X - Instagram - YouTube4. If one platform blocks automated checks, tell the user exactly that.5. Always state: - this is namespace triage - final confirmation should happen in the registrar or signup flow - this is not trademark clearance## Recommended outputReturn:- a 1-2 sentence recommendation- the best 2-3 candidate variants- a compact domain table- a compact platform table- a short unresolved list## Supported platformsSee [references/platforms.md](references/platforms.md).

Frequently asked questions