SkillTip

MCP-Defender

by MCP-Defender

Desktop app that automatically scans and blocks malicious MCP traffic in AI apps like Cursor, Claude, VS Code and Windsurf.

255
Stars
42
Forks
TypeScript
Language
8/23/2026
Added
View on GitHubDownload ZIP

⚠️ Third-Party Software Notice

This skill is third-party open-source software developed and hosted independently on GitHub. SkillTip is an informational directory and does not control or maintain the underlying repository. Any security checks displayed are automated and limited in scope. Review the source code before installing.

Read the Terms of Service

MCP Servers

Installation

Add to your Claude Code skills directory:

# Add to your Claude Code skills
git clone https://github.com/MCP-Defender/MCP-Defender

Getting Started

Guides for using skills like MCP-Defender.

Security Report

Verified

Last scanned: —

{
  "status": "PASSED",
  "issues": []
}

README.md

Shows a black knight in light color mode and a white knight one in dark color mode.

MCP Defender

Automatically protects MCP traffic in AI apps

GitHub License

MCP Defender has been acquired by Docker Inc.

🛡️ MCP Defender is a desktop app that protects AI apps like Cursor from a variety of attacks.

🚦 All MCP tool call requests and responses from AI apps are automatically proxied through MCP Defender.

🔎 The intercepted data is then checked against a set of signatures.

🔐 If anything harmful is detected, MCP Defender alerts you and asks if you want to allow or block the tool call.

Demos

https://github.com/user-attachments/assets/363ae2b1-e395-4cdc-b5ca-e9862baf89c3

Quick Start

Download MCP Defender for Mac

Alternatively you can clone the git repo, and run it as follows:

# Install dependencies
npm install

# Start app
npm start

Which apps are automatically protected?

MCP Defender protects Cursor, Claude, Visual Studio Code and Windsurf.

License

MCP Defender is licensed under the AGPL-3.0 license. For more details, see the LICENSE.

Frequently Asked Questions

What is MCP-Defender?⌄

MCP-Defender is an open-source mcp servers skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by MCP-Defender. Desktop app that automatically scans and blocks malicious MCP traffic in AI apps like Cursor, Claude, VS Code and Windsurf. It has 255 GitHub stars.

Is MCP-Defender safe to use?⌄

MCP-Defender failed SkillsLLM's automated security scan, which flagged one or more high-severity issues. Review the Security Report section carefully before using it.

How do I install MCP-Defender?⌄

Clone the repository with "git clone https://github.com/MCP-Defender/MCP-Defender" and add it to your Claude Code skills directory (see the Installation section above).

What programming language is MCP-Defender written in?⌄

MCP-Defender is primarily written in TypeScript. It is open-source under MCP-Defender on GitHub, so you can review or fork the full source.

Are there alternatives to MCP-Defender?⌄

Yes. SkillsLLM lists many other MCP Servers skills you can browse and compare side by side. Open the MCP Servers category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh MCP-Defender against similar tools.

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