Overview

Since Claude Code introduced its plugin system, the ecosystem has been expanding rapidly. It started with one official marketplace, but there are now community directories and a dedicated Korean-language marketplace among the options. This post compares the four major marketplaces and lays out criteria for choosing based on your needs.

Ecosystem Structure

The Claude Code plugin ecosystem divides into three broad layers.

graph TD
    A["Claude Code CLI"] --> B["Built-in Official Marketplace <br/> claude-plugins-official"]
    A --> C["Third-party Marketplaces <br/> GitHub repo-based"]
    
    B --> D["Code Intelligence <br/> LSP for 11 languages"]
    B --> E["External Integrations <br/> GitHub, Slack, Jira, etc."]
    B --> F["Development Workflows <br/> commit, PR review"]
    B --> G["Output Styles"]
    
    C --> H["claudemarketplaces.com <br/> community directory (2,919)"]
    C --> I["modu-ai/cc-plugins <br/> Korean-language marketplace"]
    C --> J["skillsmp.com <br/> Agent Skills"]
    
    H --> K["GitHub Repos <br/> individual marketplaces"]
    I --> L["Security-focused plugins <br/> Auth0, MFA, Compliance"]
    
    style A fill:#6366f1,color:#fff
    style B fill:#059669,color:#fff
    style C fill:#d97706,color:#fff

1. Official Marketplace — claude-plugins-official

The default marketplace operated directly by Anthropic. Available automatically with Claude Code installation.

Main Categories

Installation

# Install a plugin
/plugin install plugin-name@claude-plugins-official

# List installed plugins
/plugin list

Pros: Backed by Anthropic, so stability and compatibility are guaranteed. No marketplace registration required.

Cons: Limited plugin selection; difficult to reflect the full range of community needs.

2. claudemarketplaces.com — Community Directory

An independent project run by @mertduzgun with no official relationship with Anthropic. Currently indexes 2,919 marketplaces, making it the largest by scale.

Popular Marketplaces (by Stars)

Category Breakdown

Organized into granular categories including 3D-Development, Agents, Authentication, Automation, Backend, Claude, and Code-Quality. Sponsored listings (ideabrowser.com, supastarter, etc.) are included, so it’s worth developing the habit of checking whether a listing is sponsored.

Pros: Massive scale, category search, Stars-based popularity indicators.

Cons: No quality verification; security judgment is the user’s responsibility since this is unofficial.

3. skillsmp.com (SkillsMP)

A marketplace specializing in Agent Skills, with Korean UI support at skillsmp.com/ko. At the time of writing, HTTP 403 errors are occurring on access, so stability needs to be verified.

Pros: Korean UI, Agent Skills specialization.

Cons: Unstable access (403 errors), unable to verify content.

4. modu-ai/cc-plugins — Korean Community

A Korean-optimized marketplace positioned as the “ModuAI Official Claude Code Plugin Marketplace.”

Characteristics

• Stars: 56 (early stage)
• License: GPL-3.0 (Copyleft)
• Tech stack: MoAI-ADK (AI Development Kit), DDD methodology
• Focus areas: Auth0 security, MFA, token security, compliance

Installation

# Register marketplace
/plugin marketplace add modu-ai/cc-plugins

# Install after registration
/plugin install plugin-name@modu-ai-cc-plugins

Pros: Korean documentation, security-focused plugins, domestic community support.

Cons: Still early stage with limited plugins; understanding the GPL-3.0 license restrictions is required.

Marketplace Comparison Summary

Plugin System Architecture

The marketplace system in Claude Code runs on GitHub repos as its foundation.

graph LR
    subgraph "Marketplace structure"
        A["marketplace.json"] --> B["sources <br/> plugin metadata"]
        A --> C["scopes <br/> permission scope definitions"]
        B --> D["GitHub Repos"]
        B --> E["Git URLs"]
        B --> F["npm Packages"]
        B --> G["Local Paths"]
    end
    
    subgraph "Installation flow"
        H["User"] --> I["/plugin marketplace add"]
        I --> A
        H --> J["/plugin install"]
        J --> K["Plugin download <br/> + activation"]
    end
    
    style A fill:#6366f1,color:#fff
    style H fill:#059669,color:#fff

Supported Plugin Source Types

Team Marketplace Configuration

For shared team marketplaces, configure in .claude/settings.json:

{
  "extraKnownMarketplaces": [
    "your-org/internal-plugins"
  ]
}

Selection Guide — Which Marketplace to Use?

Recommendations by Situation

“Starting from scratch” — begin with the official marketplace. No setup required and you can start by strengthening code intelligence with LSP plugins.

“Need a wide variety of plugins” — search claudemarketplaces.com, check Stars and recent update dates, then register individual marketplaces. ComposioHQ/awesome-claude-skills (107 plugins) and wshobson/agents (73 plugins) are both practical options.

“Working in a Korean-language environment” — register modu-ai/cc-plugins for Korean documentation and domestic community support.

“Security is a priority” — use the official marketplace as your base and only install third-party plugins after personally reviewing the source code.

Security Considerations

Security is the most critical issue in the plugin ecosystem.

1. Anthropic does not verify third-party plugins. The official documentation explicitly states “user must trust plugins.”

2. Before installing, check:

   • GitHub repo Stars, Issues, and recent commit activity
   • License (Copyleft licenses like GPL-3.0 can affect commercial projects)
   • Permission (scopes) the plugin requests
   • Whether the source code makes external API calls or transmits data

3. Auto-update settings: Only enable auto-update for trusted marketplaces; manage others manually.

4. Sponsored listing caution: Sponsored listings on claudemarketplaces.com are not quality endorsements — they are advertisements.

Quick Links

• Claude Code official plugin docs
• claudemarketplaces.com
• skillsmp.com
• modu-ai/cc-plugins
• Marketplace creation guide

Insights

The Claude Code plugin ecosystem is still in an early growth phase. The pace of growth — fast enough to index 2,919 marketplaces — is impressive, and both the official marketplace’s organized category structure and the Korean community’s self-run marketplace are positive signals. However, the lack of quality verification, the absence of a compatibility standard between plugins, and a trust model that relies solely on GitHub Stars all need improvement. The VS Code extension ecosystem took years to mature, and Claude Code will need time too. For now, a rational strategy is to center your usage on the official marketplace while selectively leveraging community marketplaces.