🛡️ MCP Defender is a desktop application that automatically protects your computer from malicious MCP traffic.
🚦 All MCP tool call requests and responses from AI apps like Cursor, Claude and Windsurf are automatically proxied through MCP Defender.
🔎 The intercepted data is then checked against security signatures - if anything harmful is detected, MCP Defender will alert you and ask if you want to allow or block the tool call from proceeding.
MCP.Defender.Small.mp4
Windows & Linux Coming Soon
Alternatively you can clone the git repo, and run it as follows:
# Install dependencies
npm install
# Start app
npm startWe love contributions! Feel free to open issues for bugs or feature requests.
MCP Defender is CC BY-NC-SA 4.0 licensed.