MCP Defender

@MCP-Defender

Basic information

About MCP Defender

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

#mcp #ai-tools #model-context-protocol #mcp-server #mcp-client #mcp-tools #mcp-security#mcp-client-security

MCP Defender config

No standard config provided

This server doesn't expose a parseable MCP config block in its README. See the repository for install instructions.

Repository

MCP Defender tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is MCP Defender?

MCP Defender is a desktop app that protects AI apps like Cursor from attacks by automatically proxying all MCP tool call requests and responses, checking them against a set of signatures, and alerting you to allow or block any harmful activity.

How to use MCP Defender?

Download the latest release for Mac from the GitHub releases page, or clone the repo, install dependencies with npm install, and start the app with npm start.

Key features of MCP Defender

Automatically proxies MCP tool call traffic from AI apps
Checks intercepted data against attack signatures
Alerts the user and asks to allow or block detected threats
Protects Cursor, Claude, Visual Studio Code, and Windsurf

Use cases of MCP Defender

Protect AI coding assistants from malicious tool call attacks
Intercept and inspect MCP traffic for security vulnerabilities
Block harmful actions before they execute in the AI app

Frequently asked questions

Which apps are automatically protected?

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

How do I get started?

Download the latest release for Mac from the GitHub releases page, or clone the repo, then run `npm install` and `npm start`.

What license is MCP Defender under?

MCP Defender is licensed under the AGPL-3.0 license.

Who acquired MCP Defender?

MCP Defender has been acquired by Docker Inc.

What does MCP Defender protect against?

It protects against attacks on MCP tool calls by checking the intercepted data against a set of signatures and alerting you if anything harmful is detected.

Comments

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