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Jscpd

Jscpd is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Copy/paste detector for source code. 220+ languages, Rust engine, SARIF/HTML/badge reporters, GitHub Action, MCP server for AI agents. It has 6,450 GitHub stars, is released under the MIT license and runs locally with npx -y jscpd.

github.com/kucherenko/jscpd (opens in a new tab)

Data as of from the GitHub API; description from the project's repository. Report an error

View on GitHub (opens in a new tab)

Install Jscpd

Generated from the server's published package. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "jscpd": {
      "command": "npx",
      "args": [
        "-y",
        "jscpd"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio jscpd -- npx -y jscpd

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "jscpd": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jscpd"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "jscpd": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jscpd"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Jscpd

Duplicate code detector for 220+ languages — plus dead code, complexity hotspots, duplication and health trends over git history, and one health score for the whole codebase. Rust engine, self-contained binary, AI-ready with an MCP server and a token-efficient reporter.

  • copy-paste
  • duplicates
  • cpd
  • code-quality
  • clones-detection
  • ai
  • coding-agents
  • skills
  • mcp
  • dry

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FAQ

Jscpd FAQ

Still curious? Email info@appsgit.com.

How do I install the Jscpd MCP server?

Add the command npx -y jscpd to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Jscpd free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is Jscpd actively maintained?

The most recent commit was on Oct 25, 2026. The latest release is v5.4.2, published Oct 20, 2026. appsgit only lists MCP servers with a commit in the last six months.