Project Shield
One command to security-grade your MCP server
What it does
Your AI tools connect to MCP servers — but who checks if those servers are secure? Project Shield is a CLI that grades your MCP setup in one command: `npx project-shield scan` It catches prompt injection in tool descriptions, missing auth in MCP configs, leaked API keys (regex + entropy + context), and PII exposure. You get an A–F security grade, fix-it guides for every finding, and a deploy lock on F grade. No signup. No dashboard. Just run it. Free (5 scans/month) · Pro for teams.
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I noticed the growing security concerns around MCP (https://news.ycombinator.com/item?id=43600192) and built an open source tool that can detect several patterns of tool poisoning attacks, exfiltration channels and cross-origin manipulations. MCP-Shield scans your installed servers (Cursor, Claude Desktop, etc.) and shows what each tool is trying to do at the instruction level, beyond just the API surface. It catches hidden instructions that try to read sensitive files, shadow other tools' behavior, or exfiltrate data. Example of what it detects: - Hidden instructions…
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Hi HN! We just launched Codacy Guardrails, an IDE extension with a CLI for code analysis and MCP server that enforces security & quality rules on AI-generated code in real-time. It hooks into AI coding assistants (like VS Code Agent Mode, Cursor, Windsurf), silently scanning and fixing AI-suggested code that has vulnerabilities or violates your coding standards, while the code it’s being generated. We built this because coding agents can be a double-edged sword. They do boost productivity, but can easily introduce insecure or non-compliant code. One recent research team at NYU found that 40%…
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