# Jscpd (MCP server)

> 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.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/kucherenko/jscpd |
| GitHub stars | 6,450 |
| License | MIT |
| Language | Rust |
| Transport | stdio |
| Packages | npm: jscpd; pypi: jscpd; docker: ghcr.io/kucherenko/jscpd |
| Remote URL | none |
| Needs API key | no |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Developer tools |
| Latest release | v5.4.2 (Oct 20, 2026) |
| Last commit | Oct 25, 2026 |

## Install

### Claude Desktop (claude_desktop_config.json)

```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

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

### Cursor (.cursor/mcp.json)

```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)

```json
{
  "servers": {
    "jscpd": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jscpd"
      ]
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

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