Nameable

Nameable

Is the name really free? Nameable checks every registry, store and domain your project needs.

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Nameable checks a name on package registries, GitHub, agent and editor directories, app stores and domains, shows the evidence behind every answer, and says how sure each answer is. It runs as a CLI, as an MCP server for AI agents, and as a Claude Code plugin that also looks for prior art and recommends which name to keep.

Why

Most availability checks ask each registry whether the name exists and read "not found" as free. Not found only means nobody holds that exact name. The registry may still refuse it:

Nameable applies each registry's own rules, taken from its source code, and checks the lists those rules need: similar and reserved names, aliases and old names, recently deleted names, unpublished packages. When a rule cannot be checked, the answer says "probably" and why, instead of "available". A failed request is unknown, never free.

Use it from the terminal

Requires Node.js 22 or later. Run it in your project (or any folder under it, up to the repository root) and it checks the channels the project ships on, picked from its files:

• package.json for npm (unless it has no name, is private, or is a server or site: it starts, serves or deploys itself and declares nothing to publish), Homebrew when it has a bin; with engines.vscode, VS Code Marketplace and Open VSX instead of npm
• pyproject.toml, setup.py or setup.cfg that describe a package for PyPI, Homebrew when they declare scripts
• Cargo.toml for crates.io (unless publish = false), Homebrew when it builds a binary
• a .gemspec for RubyGems, composer.json for Packagist (unless it is a project), pubspec.yaml for pub.dev (unless publish_to: none), a .NET project or solution for NuGet (unless it builds a web app, a function, an executable or tests, or is not packable), a Dockerfile for Docker Hub, a Package.swift with an executable for Homebrew
• .claude-plugin/, .cursor-plugin/ and gemini-extension.json for those directories, a plugin.xml or the IntelliJ Gradle plugin for JetBrains Marketplace, an MCP SDK dependency for the MCP Registry and Smithery
• an Xcode project for the App Store, an Android app for Google Play, and an Expo or Flutter app for both
• at an npm, pnpm, Yarn, Lerna or Cargo workspace root, the channels of each member, read the same way

GitHub accounts and repositories and domains are always checked; a project that ships on none of these, such as a Rails app or a Go library, gets only those (and Homebrew for a Go command). Outside a project it checks a general set: npm, PyPI, crates.io, Homebrew, GitHub and domains.

npx nameable nameable --all --tlds com,dev,sh

Checking "nameable" on 25 channels

✗ npm taken Find out if a name is free everywhere it matters for … ✓ PyPI available ✓ crates.io available ✓ Homebrew available no homebrew-core formula or cask ✗ RubyGems taken A library that provides parsing and output of person … ✓ Packagist probably available no packages under this vendor; packages frozen for sp… ✓ pub.dev probably available no package with this name; moderated packages and res… ✓ NuGet probably available no package with this ID; reserved prefixes and the ty… ✓ Docker Hub probably available no user or organization; deactivated or reserved Dock… ✓ GitHub user/org probably available suspended, deleted or reserved accounts also look fre… ✗ GitHub repository taken clash, not a block: dwightwatson/nameable (★30, pushe… ✓ MCP Registry probably available no server uses this name in the registry as of 2026-10… ✓ Smithery probably available no public servers; a namespace with none, or with onl… ✓ Claude plugins available not in the official marketplace ✓ Cursor plugins probably available not among Cursor's listed plugins; plugins in review … ✓ Gemini extensions probably available not in the Gemini CLI gallery; it lists only tagged G… ✓ VS Code Marketplace probably available no extension or publisher; removed extensions keep th… ✓ Open VSX probably available no namespace or similar one; namespaces without publi… ✓ JetBrains Marketplace probably available no plugin with this name or ID; unapproved and hidden… ✓ App Store probably available no app with this name in the US store; unreleased app… ✓ Google Play probably available no app with this title in search results of the US st… ✓ Trademarks (TW) probably available no Taiwan trademark uses exactly this name as of 2026… ✗ .com taken registered 1999-02-13, expires 2027-02-13 ✓ .dev probably available not registered; a registry can still refuse premium o… ✓ .sh probably available not registered (whois); a registry can still refuse p…

npm https://www.npmjs.com/package/nameable RubyGems https://rubygems.org/gems/nameable GitHub repository https://github.com/dwightwatson/nameable .com https://lookup.icann.org/en/lookup?name=nameable.com

21 available (17 probably) · 4 taken

Several names show a grid to compare them:

npx nameable twinsy dupefind fclones --only crates,homebrew,github,domain --tlds com,dev,sh

                   twinsy    dupefind  fclones

crates.io ✓ ✓ ✗ Homebrew ✓ ✓ ✗ GitHub user/org ✗ ✓* ✓* .com ✗ ✗ ✓* .dev ✓* ✓* ✓* .sh ✓* ✓* ✓* free 4/6 5/6 4/6

✓ available ↺ reclaimable ✗ taken ⊘ unavailable ? unknown * probably available Check one name at a time for the details behind each mark.

GitHub checks use GITHUB_TOKEN, GH_TOKEN or gh auth token when one is available, for a higher rate limit.

Use it with AI agents

Claude Code plugin

/plugin marketplace add minanyang/claude-plugins

/plugin install nameable@minanyang

Then ask for a name, or run /nameable:check . The skill picks the channels that matter for your project, checks them, looks for projects that already do the same thing, and gives a verdict for each candidate: use it, use it with changes (a scope, another TLD, another GitHub owner), or drop it.

The plugin carries its own copy of the CLI and runs it with Node.js 22 or later. When it installs, Claude Code adds the CLI's two dependencies, zod and @modelcontextprotocol/server, from the npm lockfile in the plugin.

MCP server

npx -y nameable mcp runs the same checks as an MCP server over stdio. It has one read-only tool, check_names (names, and optionally channels, tlds and refresh), which returns the JSON below as structured content. It is listed on the official MCP Registry as io.github.minanyang/nameable.