MCP Defender
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Watch how MCP Defender protects Cursor in real-time
WHY MCP DEFENDER?
Intelligent Threat Detection
MCP Defender will alert you as soon it identifies any malicious activity being performed by your AI apps.
Detection is ultra-fast and runs in the background so your AI apps are never slowed down.
Multiple layers of defense are combined including advanced LLM analysis and deterministic signatures.
Stay safe with comprehensive protection against prompt injection, tool poisoning, credential theft, and command injection.
Control How You Scan
Choose Your LLM Provider
Use MCP Defender with your preferred AI provider or our hosted service for seamless security.
Open Source
MCP Defender is Open Source and AGPL-3.0 licensed.
Automatic Protection
MCP Defender acts as a secure proxy between your AI applications and MCP servers, analyzing all communications for potential threats in real-time. Cursor, Claude, Visual Studio Code and Windsurf are supported, with more coming soon.
SECURITY THREATS
Complete Protection
MCP Defender identifies and blocks AI security threats before they can cause damage
Prompt Injection
Manipulate an LLM with malicious instructions
Credential Theft
Read or transmit sensitive credentials like SSH keys
Arbitrary Code Execution
Unsanitized execution of malicious code
Remote Command Injection
Gives an attacker remote shell access