MCP-Defender
by MCP-Defender·★ 252·Score 46
Desktop app that scans and blocks malicious MCP traffic in AI apps like Cursor and Claude.
Overview
MCP Defender is a desktop security application that acts as a proxy for MCP (Model Context Protocol) traffic between AI applications and MCP servers. It intercepts all tool call requests and responses, automatically scanning them against threat signatures before allowing them to proceed. If potentially harmful content is detected, the app alerts users and provides options to block or allow specific tool calls. The application has been acquired by Docker Inc., indicating significant enterprise interest and likely continued development.
Try asking AI
After installing, here are 5 things you can ask your AI assistant:
When to choose this
Choose MCP Defender when using AI applications that interact with MCP servers and you need protection against potentially malicious tool calls or data exfiltration.
When NOT to choose this
Don't choose MCP Defender if you need cross-platform support (currently only Mac), or if you prefer open-source security tools over commercial-acquired solutions.
Comparable tools
Installation
Installation
Download the latest release for Mac from the [GitHub releases page](https://github.com/MCP-Defender/MCP-Defender/releases/latest)
Alternatively, clone and run locally:
# Install dependencies
npm install
# Start app
npm startConfiguration
MCP Defender works automatically with supported AI applications (Cursor, Claude, VS Code, Windsurf). No manual configuration is required.
FAQ
- How does MCP Defender protect my AI applications?
- MCP Defender acts as a proxy for MCP traffic, scanning all tool calls and responses for malicious content before allowing them to proceed.
- Which applications are compatible with MCP Defender?
- Currently supports Cursor, Claude, Visual Studio Code, and Windsurf. The app automatically detects and protects these environments.
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Last updated · Auto-generated from public README + GitHub signals.