MCP Defender

Overview

MCP Defender is an open-source AGPL-3.0 secure proxy that scans and filters MCP tool calls in real time, using LLM detection and deterministic signatures to block prompt injection, tool poisoning, credential theft, arbitrary code and remote commands.

From the official site

MCP Defender protects Cursor and other AI apps on your computer from security threats.

The text above is quoted from this tool’s official website — the vendor’s own words.

Key points from the official site

Threat Detection
Choose Your LLM Provider

The points above are quoted from this tool’s own website sections and feature lists — vendor copy, not our review.

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