The best Claude Code plugins are the ones that fix a problem you already have, and a reasonable place to start is Anthropic’s own marketplace. This guide explains what Claude Code plugins are, how to install them, which ones Anthropic’s Claude Marketplace marks as verified, what the security and context costs are, and whether plugins cost anything. Everything below comes from Anthropic’s plugin docs and Claude Marketplace, read on October 10, 2026.
⚡ TL;DR: The Bottom Line
What It Is: A plugin is a directory of skills, agents, hooks, MCP servers and other components that Claude Code installs as one unit.
How to Install: Run /plugin in Claude Code, pick one from the Discover tab, review the details pane and choose a scope.
Cost: Anthropic’s pages list no fee for installing a plugin. You need a plan that includes Claude Code, for example Claude Pro at $20 a month or Max from $100.
Our Take: We would start with two or three plugins from the official marketplace, check the context cost, and read before you install anything else.
⚠️ The Catch: A plugin can run code on your machine with your privileges, and Anthropic does not review third-party marketplaces.
📑 Quick Navigation
🔌 What Claude Code Plugins Are
Anthropic describes a plugin as a directory of components that Claude Code “installs and loads as one unit”. The components can be skills (instructions Claude loads when relevant), agents (subagent definitions), hooks (commands that run at points in Claude Code’s lifecycle), MCP servers (tool servers Claude connects to) and language servers. A plugin with a JavaScript hooks module is called a mod. The manifest lives at .claude-plugin/plugin.json.
You do not need a plugin for any one of these. Skills, subagents, hooks and MCP servers all work on their own. A plugin earns its place when you want several of them packaged together, shared with a team or updated from a marketplace. For the MCP part, see our MCP explained guide.
🔍 REALITY CHECK
Marketing Claims: Claude Marketplace advertises “Over 2,000 connectors and plugins”.
What It Really Means: That figure combines connectors and plugins. The plugins page itself showed 342 plugins on October 10, and many popular plugins live in authors’ own marketplaces that Anthropic does not list or review.
Verdict: Treat any single plugin count as a rough guide, and judge each plugin by what it adds and who maintains it.
🚀 How to Install a Claude Code Plugin
Per Anthropic’s install guide, the steps in a terminal session are:
- Open the plugin. Run
/plugin install commit-commands@claude-plugins-official, or run/pluginalone and browse the Discover tab. In a session the install command opens the plugin’s details so you can review it before anything installs. - Review the details pane. It shows what the plugin will install (commands, agents, skills, hooks, MCP and LSP servers). For plugins in Anthropic’s official marketplace it also shows a last-updated date and a context cost with an “Every turn” and a “When invoked” token estimate. The cost appears when you open the plugin by naming its marketplace, as in the install command above, or from the Marketplaces tab, not from the Discover list.
- Choose a scope. User scope enables it in every project on your machine. Project scope enables it for everyone who works in the repository, though each collaborator still installs it. Local scope is for you in this repository only.
- Check the summary. It says whether the plugin is active now or needs
/reload-plugins. - Confirm it works. Type
/and look for/plugin-name:skill-name, or runclaude plugin listin your shell.
You can also install from your shell with claude plugin install NAME@MARKETPLACE, and the desktop app and the VS Code extension have their own plugin screens. Anthropic’s official marketplace is added the first time you start an interactive terminal session. Anything else needs /plugin marketplace add first, for example /plugin marketplace add anthropics/claude-plugins-community for the community marketplace.
🏪 Anthropic’s Three General-Purpose Marketplaces (and Everyone Else’s)
| Marketplace | Name to type after @ | What is in it | How you get it |
|---|---|---|---|
| Official | claude-plugins-official | Plugins Anthropic maintains, plus plugins from partners and other authors | Added automatically on your first interactive terminal session |
| Community | claude-community | Third-party plugins that authors submitted to Anthropic | /plugin marketplace add anthropics/claude-plugins-community |
| Demo | claude-code-plugins | A small set of example plugins | /plugin marketplace add anthropics/claude-code |
Anthropic says most of the official marketplace comes from partners and other authors, with a smaller set maintained by Anthropic itself, such as commit-commands, code-review and feature-dev. Many popular plugins sit in their authors’ own marketplaces instead, and Anthropic does not review those. If an old tutorial tells you to add anthropics/claude-code, that adds the demo marketplace, not the official one, and Anthropic suggests installing duplicates such as code-review from the official marketplace to avoid two copies.
🏆 Best Claude Code Plugins for Developers
We found no ranking on Anthropic’s pages, so “best” here means the plugins that Claude Marketplace marks Anthropic verified on its plugins page, plus a few well-known ones it lists. The page does not define the badge, so do not read it as a safety review. On October 10, 13 of the 24 plugins on the first page carried that badge. We have not run these plugins ourselves, so the descriptions below are what each one is for, not a performance claim.
| Plugin | Marked by Claude Marketplace | Good for |
|---|---|---|
| Code Review | Anthropic verified | AI review of pull requests using specialized agents |
| PR Review Toolkit | Anthropic verified | Review agents covering comments, tests, errors, types, quality and simplification |
| Feature Dev | Anthropic verified | A feature-development workflow with agents for exploration, design and review |
| Commit Commands | Anthropic verified | Commit, push and open a pull request from commands |
| Frontend Design | Anthropic verified | Building polished front-end code |
| Code Simplifier | Anthropic verified | Cleaning up code after a change |
| Security Guidance | Anthropic verified | Warnings about command injection, XSS and unsafe patterns when editing files |
| Ralph Loop | Anthropic verified | Iterative loops where Claude works on a task repeatedly, seeing its prior work, until completion |
| CLAUDE.md Management; Claude Code Setup | Anthropic verified | Maintaining CLAUDE.md; recommending hooks, skills, MCP servers and subagents for a codebase |
| TypeScript LSP, Pyright LSP | Anthropic verified | Type errors and symbol lookup in TypeScript and Python |
| Context7, Playwright, GitHub, Superpowers | Listed, no verified badge on the first page | Docs lookup, browser automation, GitHub access, and a workflow of brainstorming, subagent development, debugging and TDD (third-party plugins) |
For the best Claude plugins for your own stack, start with the language server for your language. Anthropic’s code intelligence docs list official plugins for C/C++, C#, Go, Java, Kotlin, Lua, PHP, Python, Ruby, Rust, Swift and TypeScript/JavaScript, plus a Liquid plugin from Shopify. They give Claude diagnostics after each edit and symbol navigation, and you install the language server binary yourself. They work in terminal sessions, not cloud sessions.
💡 Key Takeaway: If you want the best Claude extension for Claude Code that you do not have to think about, install the language-server plugin for your main language and one review plugin, then add others only when you hit a specific gap.
🔒 Security and Context Cost
Anthropic’s security page opens with a plain warning: a plugin you install “can execute arbitrary code on your machine with your user privileges”. Hooks, monitors, MCP servers, LSP servers and the processes a mod starts run outside the sandbox. Skills, commands and agents enter Claude’s context as instructions, so they can steer what Claude does with the tools it already has. If auto-update is on for a marketplace, a plugin can change on disk after you reviewed it. Claude Code shows a trust warning in which Anthropic says it does not control what plugins include.
Anthropic’s review steps: check the marketplace source with claude plugin marketplace list, read the details pane, read the plugin’s hooks/hooks.json, .mcp.json and bin/ files, and get a component inventory with claude --plugin-dir DIR plugin details NAME (after cloning the plugin’s folder) or claude plugin details NAME (after installing). Auto-update is on by default for the official marketplace names (except two) and for marketplaces added from claude.ai, and off by default for the community, third-party and local marketplaces.
Plugins also cost context. Every session where a plugin is enabled includes the names and descriptions of its skills, agents and commands, and those tokens count against your usage whether or not the plugin runs. claude plugin details NAME prints an “Always-on” estimate, official-marketplace plugins opened by name show a context cost before you install, and the figure is highlighted at 2,000 tokens or more. On the Installed tab of /plugin, plugins you installed from a marketplace and have not used for at least 14 days and 10 sessions appear under “Not used recently”.
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🛠️ Building Your Own Plugin
You can build a plugin from an empty directory. Anthropic’s docs say to add a .claude-plugin/plugin.json manifest and the components you want, and to test it without a marketplace by starting Claude Code with --plugin-dir. To share it, you either host your own marketplace (a repository with a .claude-plugin/marketplace.json that lists plugins) or submit it to Anthropic’s directory (see Anthropic’s publish page for the requirements). Run claude plugin validate ./your-plugin to check the manifest and the skill, agent and command frontmatter (add --strict to fail on warnings), or run it on a marketplace directory to check its JSON and plugin entries. Anthropic’s directory is the claude.ai catalog and has its own submission rules, and the official marketplace does not take submissions through the directory portal. Anthropic also has pages on testing plugins with evals and on measuring cost and usage for authors.
💰 Are Claude Code Plugins Free? What You Pay
Is it free? On the Anthropic plugin pages we read, no fee is listed for installing a plugin, and Claude Marketplace shows no per-plugin pricing. What you pay for is Claude Code itself. Per Claude’s pricing page, Claude Pro costs $20 a month ($17 on the annual plan), Claude Max starts at $100 a month, and both include Claude Code. A plugin that connects Claude to an outside service may involve that service’s own pricing, though Anthropic’s pages do not say so, so check the plugin’s homepage.
Plugins are not only for developers. Anthropic notes the same format installs on claude.ai and in Cowork, where a different set of components loads. Plugins you or your organization turn on for your claude.ai account sync into Claude Code terminal sessions when you are signed in with that account, while plugins you install with /plugin stay on your machine. A cloud session does not load plugins from your local or repository settings. For the Cowork side, see our Claude Cowork review.
👤 Who Should Use Plugins (and Who Shouldn’t)
Use plugins if: you already use Claude Code daily and keep repeating the same setup, or you want a team to share the same skills, hooks and servers with one install command.
Start with built-in features instead if: you only need one skill or one MCP server. A skill in ~/.claude/skills/ is available in every project without a plugin.
Be careful if: you work with sensitive code or credentials. Read hooks and server commands, remember that a marketplace’s name says who publishes it and not what each plugin does, and turn off auto-update for marketplaces you do not trust. For Claude Code’s alternatives, see our Claude Code vs Cursor and Claude Code vs Gemini CLI comparisons.
❓ FAQs: Your Questions Answered
Q: What are the best Claude plugins for developers?
A: We would start with the Anthropic-verified ones on Claude Marketplace: Code Review, Feature Dev, Commit Commands, PR Review Toolkit and the language-server plugin for your language. Add others only for a specific need.
Q: Are Claude Code plugins free?
A: Anthropic’s pages list no install fee, but you need a plan that includes Claude Code, such as Claude Pro at $20 a month. Some plugins connect to services with their own pricing.
Q: How do I install a Claude Code plugin?
A: Run /plugin install NAME@MARKETPLACE in a Claude Code session, review the details pane, choose a scope, and reload if the summary says so. From a shell, use claude plugin install NAME@MARKETPLACE.
Q: Are Claude Code plugins safe?
A: Not automatically. Anthropic says a plugin can execute arbitrary code with your user privileges and that it does not control what plugins include, so read the details pane and the plugin’s hooks and server files first.
Q: What is the official Claude Code plugin marketplace?
A: It is claude-plugins-official, Anthropic’s catalog of plugins it maintains plus partner and author plugins. Claude Code adds it automatically the first time you start an interactive terminal session.
Q: Do plugins use up my Claude usage?
A: Yes. The names and descriptions of a plugin’s skills, agents and commands load into every session where it is enabled, and the size depends on the plugin. claude plugin details NAME shows the Always-on estimate.
Q: How many Claude Code plugins are there?
A: Claude Marketplace’s plugins page listed 342 plugins on October 10, 2026, including ones that work with Claude and Cowork as well as Claude Code. Plugins in authors’ own marketplaces are not part of that count.
Q: Do I need a plugin, or is a skill enough?
A: A skill is enough for one reusable instruction. Use a plugin when you want skills, agents, hooks or servers packaged together, shared and updated from a marketplace.
🎯 Final Verdict: Worth Using, If You Read First
Plugins are a tidy way to package and share Claude Code setups, and Anthropic’s own docs make the install and review steps clear. The risk is real, because a plugin can run code with your privileges and the biggest catalogs are not reviewed by Anthropic. Install a few from the official marketplace, look at the context cost where it is shown, and add more only when a plugin solves a problem you actually have.
Use them if: you live in Claude Code. Go slow if: you handle sensitive code. Skip them if: a single skill does the job. Check Claude Marketplace for the current list.
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Related Reading
- Claude Code Review
- Claude Code vs Cursor
- Claude Code vs Gemini CLI
- MCP Explained
- Claude Agent Teams Review
- Claude Code Router Review
- Google Antigravity Review
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Last Updated: October 10, 2026
Docs Covered: Anthropic’s Claude Code plugin pages and Claude Marketplace as of October 10, 2026
Next Review Update: November 10, 2026
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