MCP-Shield: Protecting Your Model Context Protocol Servers

MCP-Shield is a tool for scanning and detecting vulnerabilities in your MCP (Model Context Protocol) servers. It identifies security risks such as tool poisoning attacks, data exfiltration channels, and cross-origin escalations. The tool supports various configuration methods and optionally integrates Anthropic's Claude AI for deeper analysis. Common vulnerability patterns detected include tool poisoning with hidden instructions, tool shadowing and behavior modification, data exfiltration channels, and cross-origin violations. For example, it can identify a calculator tool that secretly attempts to access SSH private keys. MCP-Shield aims to help developers and security auditors secure their MCP servers and supports scanning before adding new servers, during security audits, during development, and after updates.