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<h1 align="center">MCP Defender</h1>
<h2 align="center">Automatically protects MCP traffic in AI apps</h2>

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<a href="LICENSE"></a>
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<h1 align="center"><a href="https://www.docker.com/blog/docker-acquires-mcp-defender-ai-agent-security/">MCP Defender has been acquired by Docker Inc.</a></h1>

🛡️ 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

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.