📦 Consolidated. This package is now part of effectorHQ/effector → packages/serve/src/mcp/. All active development continues in the monorepo. This repository remains available for reference.

Run: effector serve . via the unified CLI.

openclaw-mcp

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Overview

openclaw-mcp bridges the effector SKILL.md format to the Model Context Protocol (MCP), enabling effector skills to work with any MCP-compatible agent runtime.

What It Does

Converts SKILL.md skill definitions into MCP-compatible tool definitions. Your OpenClaw skills instantly become available to:

• Claude (Claude Desktop, API)

• Cursor IDE

• Windsurf IDE

• Any MCP-supporting agent runtime

Why It Matters

• Cross-Ecosystem Portability: Build once in OpenClaw, deploy everywhere MCP is supported

• No Code Changes: Your existing SKILL.md files work without modification

• Composable Skills: Combine OpenClaw skills with MCP tools from other sources

• Standardized Interoperability: MCP is the industry standard for AI tool integration

Related MCP server: Skill-to-MCP

Install

npm install @effectorhq/skill-mcp

You can also use the CLI directly without installing globally:

npx @effectorhq/skill-mcp ./skills
npx @effectorhq/skill-mcp --stdio

See the published package on npm: https://www.npmjs.com/package/@effectorhq/skill-mcp

Quick Start

Start MCP Server

npx @effectorhq/skill-mcp serve ./skills/

The server listens on stdin/stdout (MCP standard) and exposes all SKILL.md files in ./skills/ as MCP tools.

In Claude Desktop

Add to ~/.claude/desktop/config.json (macOS/Linux) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "openclaw": {
      "command": "node",
      "args": ["[path-to-node-modules]/@effectorhq/skill-mcp/bin/skill-mcp.js", "serve", "./skills"]
    }
  }
}

Restart Claude Desktop. Your OpenClaw skills are now available as tools.

Architecture

┌─────────────────────┐
│   SKILL.md Files    │
│  (frontmatter +     │
│   markdown body)    │
└──────────┬──────────┘
           │
           ▼
┌─────────────────────┐
│  skill-mcp Parser   │
│  (YAML → JSON)      │
└──────────┬──────────┘
           │
           ▼
┌─────────────────────┐
│  MCP Converter      │
│  (schema mapping)   │
└──────────┬──────────┘
           │
           ▼
┌─────────────────────┐
│  MCP Server (stdio) │
│  (JSON-RPC 2.0)     │
└──────────┬──────────┘
           │
           ▼
┌─────────────────────┐
│  MCP Clients        │
│  • Claude           │
│  • Cursor           │
│  • Windsurf         │
│  • etc.             │
└─────────────────────┘

CLI Usage

Serve

Start an MCP server hosting your skills:

skill-mcp serve <directory> [--port 3000]

Convert

Convert a single SKILL.md to MCP JSON schema:

skill-mcp convert <path-to-skill.md> [--output output.json]

Validate

Validate SKILL.md files for MCP compatibility:

skill-mcp validate <directory>

Help

skill-mcp --help

Programmatic API

parseSkill(filePath)

Parses a SKILL.md file into a skill object.

import { parseSkill } from '@effectorhq/skill-mcp';

const skill = await parseSkill('./skills/my-skill.md');
console.log(skill.frontmatter.name);

convertToMCPTool(skill)

Converts a parsed skill to MCP tool schema.

import { convertToMCPTool, parseSkill } from '@effectorhq/skill-mcp';

const skill = await parseSkill('./skills/my-skill.md');
const mcpTool = convertToMCPTool(skill);
console.log(mcpTool);
// { name: '...', description: '...', inputSchema: { type: 'object', ... } }

createMCPServer(skillsDirectory)

Creates and returns a JSON-RPC 2.0 MCP server.

import { createMCPServer } from '@effectorhq/skill-mcp';

const server = createMCPServer('./skills');
await server.start();

File Structure

• bin/skill-mcp.js — CLI entry point

• src/index.js — Main module exports

• src/parser.js — SKILL.md parser (YAML frontmatter)

• src/converter.js — SKILL.md → MCP tool converter

• src/server.js — JSON-RPC 2.0 MCP server

• tests/ — Test suite (Node.js built-in test runner)

• docs/ — Architecture and mapping documentation

Development

npm test
npm run lint
npm run build

Contributing

Contributions welcome! See CONTRIBUTING.md.

License

This project is currently licensed under the Apache License, Version 2.0 。