Skill Library MCP

15,000+ ready-to-use skills for AI coding assistants, served on demand via MCP.

An MCP server that provides on-demand skill loading for AI coding assistants. Instead of stuffing your system prompt with every skill you might need, this server indexes 15,000+ skills and serves only the ones relevant to your current task — keeping context windows lean and responses focused.

Documentation

Full documentation is at modbender.in/skill-library-mcp — installation, the tools it exposes, configuration, and examples.

Why?

• 15,000+ skills covering frontend, backend, DevOps, security, testing, databases, AI/ML, automation, and more
• On-demand loading — skills are fetched only when needed, not crammed into every conversation
• IDF-weighted search — finds the right skill even from natural language queries like "help me debug a memory leak"
• Browse by category — 13 categories to discover skills you didn't know existed
• Works with any MCP-compatible tool — Claude Code, Cursor, Windsurf, VS Code, Claude Desktop, and others
• Claude Code plugin — one-command install with claude plugin install
• Zero config — run with npx, no setup needed

Quick Start

Claude Code Plugin (Recommended)

Add the marketplace source, then install the plugin:

claude plugin marketplace add https://github.com/modbender/skill-library-mcp.git --scope user
claude plugin install skill-library --scope user

The MCP server starts automatically when Claude Code launches. No manual configuration needed.

Claude Code (MCP Server)

claude mcp add skill-library --scope user -- npx -y skill-library-mcp

MCP Server (Other Tools)

{
  "mcpServers": {
    "skill-library": {
      "command": "npx",
      "args": ["-y", "skill-library-mcp"]
    }
  }
}

{
  "mcpServers": {
    "skill-library": {
      "command": "npx",
      "args": ["-y", "skill-library-mcp"]
    }
  }
}

{
  "mcpServers": {
    "skill-library": {
      "command": "npx",
      "args": ["-y", "skill-library-mcp"]
    }
  }
}

{
  "servers": {
    "skill-library": {
      "command": "npx",
      "args": ["-y", "skill-library-mcp"]
    }
  }
}

git clone https://github.com/modbender/skill-library-mcp
cd skill-library-mcp
pnpm install
pnpm build

{
  "mcpServers": {
    "skill-library": {
      "command": "node",
      "args": ["/path/to/skill-library-mcp/dist/index.js"]
    }
  }
}

Tools

search_skill

Search for skills by keyword. Returns a ranked list of matching skill names and descriptions.

search_skill({ query: "react patterns" })

load_skill

Load the full content of a skill by name. Optionally includes resource files.

load_skill({ name: "brainstorming", include_resources: true })

list_categories

Browse all skill categories with counts and examples. Use to discover skills before searching.

list_categories()

Skill Categories

The library includes 15,000+ skills across 13 categories:

Skill Format

Skills are directories containing a SKILL.md file with YAML frontmatter:

---
name: my-skill
description: What this skill does
---

# My Skill

Skill content here...

Skills can optionally include a resources/ directory with additional .md files that are appended when include_resources: true is set.

Contributing

Contributions are welcome! To add a new skill:

1. Create a directory under data/ with your skill name
2. Add a SKILL.md file with YAML frontmatter (name, description)
3. Run pnpm dedup to check for duplicates
4. Submit a PR

Development

pnpm install          # Install dependencies
pnpm test             # Run tests
pnpm build            # Build to dist/
pnpm dev              # Run server locally
pnpm dedup            # Check for duplicate skills
pnpm validate-skills  # Validate data/ directory structure
pnpm fix-skills       # Fix broken skills (dry run by default)
pnpm clean-skills     # Remove invalid skill dirs (dry run by default)
make ci               # Run test + validate + build

Third-Party Content

This project includes skills from openclaw/skills, licensed under the MIT License. See THIRD_PARTY_NOTICES.md for details.

License

MIT