defenter-proxy 0.0.92

Defenter proxy

Defenter Proxy

Real-time semantic monitoring of AI agent<->MCP Server communication to protect from data leaks and malicious prompt injections.

🚀 How to use

The simplest way to use Defenter is to install the VS Code/Cursor extension:

• VS Code Marketplace: Install Defenter
• Open VSX (Cursor & others): Install Defenter

The extension automatically installs and protects all your MCP servers - no manual configuration needed!

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Overview

Defenter is a semantic policy broker that understands what your AI agents are doing, not just where they're sending data. It acts as an intelligent security layer that intercepts every MCP tool call made by AI agents, analyzes the payload for sensitive information in real-time, and enforces security policies seamlessly.

Traditional security tools fall short because they can't understand the intent and content of an agent's actions. Defenter bridges this gap by enabling productivity safely, preventing data leaks, and providing visual monitoring of every agent decision.

Key capabilities:

• Semantic intent analysis of agent actions and content
• All secrets are redacted locally before any data is sent to Defenter for analysis
• Local MCP monitoring with full transparency

Architecture & How It Works

Defenter is built as a Python-based proxy server that wraps MCP servers and provides a middleware layer for intercepting MCP protocol communication. The architecture includes:

• Local-running middleware layer: Intercepts all MCP tool calls and responses
• Cloud-powered policy engine: Analyzes redacted payloads for data leak risks and policy violations
• IDE integration: Seamless integration with VS Code and Cursor extensions

References

Python Proxy: See src/README.md for detailed implementation documentation

VSC Extension: See targets/vsc-extension/README.md for installation and user guide