MCPShield

Security scanner for MCP servers — detects tool poisoning, prompt injection, and 90+ vulnerability patterns

GitHub

MCPShield CLI

Scan MCP servers and GitHub repositories for security vulnerabilities.

Powered by MCPShield — the MCP security scanner with 59+ detection rules covering the OWASP MCP Top 10.

Install

npm install -g mcpshield

Setup

Get a free API key at mcpshield.co/settings, then:

mcpshield auth mcp_sk_your_key_here

Usage

# Scan an HTTP MCP server
mcpshield scan --url https://mcp-server.example.com/mcp

# Scan a GitHub repository
mcpshield scan --github https://github.com/user/repo

# JSON output (for CI/CD)
mcpshield scan --url https://mcp-server.example.com/mcp --json

# Filter by severity
mcpshield scan --url https://mcp-server.example.com/mcp --severity high

Exit Codes

  • 0 — Scan completed, no critical findings
  • 1 — Error (invalid key, rate limit, scan failure)
  • 2 — Scan completed with critical findings

Environment Variables

  • MCPSHIELD_API_KEY — API key (alternative to mcpshield auth)
  • MCPSHIELD_API_URL — Custom API endpoint (for self-hosted)

License

MIT

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