Mcp Defender
What is Mcp Defender
MCP-Defender is an AI Firewall designed to automatically protect AI applications from malicious MCP traffic.
Use cases
Use cases for MCP-Defender include protecting desktop applications that interact with AI tools like Cursor, Claude, and Windsurf, as well as safeguarding sensitive data during AI application development.
How to use
To use MCP-Defender, download the application for Mac from the official website. For Windows and Linux, the versions are coming soon. Alternatively, you can clone the Git repository and run it using npm commands.
Key features
Key features of MCP-Defender include automatic proxying of MCP tool calls from AI applications, real-time security checks against harmful data, and user alerts for potentially harmful tool calls.
Where to use
MCP-Defender is suitable for use in environments where AI applications are deployed, particularly in development and production settings that require enhanced security against malicious traffic.
Clients Supporting MCP
The following are the main client software that supports the Model Context Protocol. Click the link to visit the official website for more information.
Overview
What is Mcp Defender
MCP-Defender is an AI Firewall designed to automatically protect AI applications from malicious MCP traffic.
Use cases
Use cases for MCP-Defender include protecting desktop applications that interact with AI tools like Cursor, Claude, and Windsurf, as well as safeguarding sensitive data during AI application development.
How to use
To use MCP-Defender, download the application for Mac from the official website. For Windows and Linux, the versions are coming soon. Alternatively, you can clone the Git repository and run it using npm commands.
Key features
Key features of MCP-Defender include automatic proxying of MCP tool calls from AI applications, real-time security checks against harmful data, and user alerts for potentially harmful tool calls.
Where to use
MCP-Defender is suitable for use in environments where AI applications are deployed, particularly in development and production settings that require enhanced security against malicious traffic.
Clients Supporting MCP
The following are the main client software that supports the Model Context Protocol. Click the link to visit the official website for more information.
Content
MCP Defender
Automatically protects MCP traffic in AI apps
🛡️ 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
Windows & Linux Coming Soon
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.
Protection for more apps coming soon!
Contributing
We love contributions! Feel free to open issues for bugs or feature requests.
License
MCP Defender is licensed under the AGPL-3.0 license. For more details, see the LICENSE.
Dev Tools Supporting MCP
The following are the main code editors that support the Model Context Protocol. Click the link to visit the official website for more information.
