Tool
GitHub - alexfraser-scotch/mcp-shield: Zero-overhead runtime security proxy, reversible secret vault, and audit firewall for MCP servers (Cursor, Claude, Windsurf)
Publication date unknown · Discovered github.com
Page published
Publication date unknown · First observed: 14 Oct 2026
Coverage timeline
Single-source analysis — one report is available.
Why it matters
mcp-shield targets a growing attack surface—MCP tool/function-calling abuse and secret exfiltration through AI agents—giving defenders a runnable proxy to inspect and constrain agent tool calls.
mcp-shield is an open-source runtime security proxy for Model Context Protocol (MCP) servers used by AI coding assistants like Cursor, Claude, and Windsurf, providing a reversible secret vault, audit firewall, and security rules including container/Kubernetes guards. The GitHub repository ships source and tests intended to intercept and govern MCP tool traffic.