🛡️ MCP Security Auditor

Security scanner for MCP (Model Context Protocol) servers. Detect vulnerabilities, hardcoded secrets, injection risks, and misconfigurations before deployment.

Works with TypeScript, JavaScript, and Python MCP servers built with any framework (official MCP SDK, FastMCP, etc).

npx mcp-security-auditor scan ./my-mcp-server

Why?

MCP servers give AI assistants (Claude, Copilot, Cursor) access to databases, APIs, filesystems, and more. A single misconfigured server can expose your entire infrastructure. This tool catches security issues before they reach production.

Quick Start

Zero install — scan any MCP server:

npx mcp-security-auditor scan ./my-mcp-server

Or install globally:

npm install -g mcp-security-auditor
mcp-audit scan ./my-mcp-server

What It Detects

| Analyzer | What It Finds | |----------|--------------| | secrets | API keys, passwords, tokens, private keys, AWS/GitHub/OpenAI/Anthropic credentials | | static | eval(), exec(), command execution, unsafe deserialization, file system writes | | injection | Prompt injection, SQL injection, template injection, NoSQL injection | | permissions | Wildcard permissions, missing auth, root filesystem access, disabled security | | network | Insecure HTTP, SSRF, TLS bypass, CORS wildcard, binding to all interfaces | | config | Debug mode, stack trace exposure, missing .env templates, hardcoded ports | | dependencies | Wildcard versions, typosquatting, missing lockfiles, suspicious packages |

Output Formats

# Terminal (default, with colors)
mcp-audit scan ./server

# HTML report (shareable, dark theme)
mcp-audit scan ./server -f html -o report.html

# JSON (programmatic use)
mcp-audit scan ./server -f json -o results.json

# SARIF (GitHub Security, Azure DevOps)
mcp-audit scan ./server -f sarif -o results.sarif

# Markdown (docs, README badges)
mcp-audit scan ./server -f markdown -o report.md

CI/CD Integration

GitHub Actions

name: MCP Security Scan
on: [push, pull_request]

jobs:
  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: npx mcp-security-auditor ci . --fail-on high -o results.sarif
      - uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: results.sarif

GitLab CI

mcp-security:
  script:
    - npx mcp-security-auditor ci . --fail-on high -f json -o mcp-audit.json
  artifacts:
    reports:
      security: mcp-audit.json

Azure DevOps

- script: npx mcp-security-auditor ci . --fail-on high -f sarif -o $(Build.ArtifactStagingDirectory)/mcp-audit.sarif
  displayName: 'MCP Security Scan'

Pre-commit Hook

# .git/hooks/pre-commit
npx mcp-security-auditor ci . --fail-on critical

CLI Reference

mcp-audit scan <path>           Scan an MCP server directory
mcp-audit ci <path>             CI/CD mode (SARIF, exits non-zero on findings)
mcp-audit analyzers             List available analyzers
mcp-audit --version             Show version

Options:
  -f, --format <format>         text | json | sarif | html | markdown
  -o, --output <file>           Write report to file
  --fail-on <severity>          Exit 1 if findings >= severity (critical|high|medium|low)
  -a, --analyzers <list>        Run specific analyzers (comma-separated)
  -V, --verbose                 Detailed scan progress
  --no-color                    Disable colors

Programmatic API

import { scan, generateReport } from "mcp-security-auditor";

const result = scan({ path: "./my-mcp-server", format: "json" });

console.log(`Found ${result.summary.total} issues`);
console.log(`Critical: ${result.summary.critical}`);

// Generate HTML report
const html = generateReport(result, "html");

Supported MCP Frameworks

• @modelcontextprotocol/sdk (Official TypeScript SDK)
• FastMCP (Python)
• mcp-python-sdk (Official Python SDK)
• Any custom MCP server implementation

Example Output

╔══════════════════════════════════════════════════════╗
║         MCP Security Auditor - Scan Report          ║
╚══════════════════════════════════════════════════════╝

Server:    my-mcp-server v1.0.0
Language:  typescript
Framework: mcp-sdk
Transport: stdio
Tools:     3 detected [query_db, write_file, run_command]
Files:     12 source files scanned
Duration:  45ms

Summary: 8 findings
  🔴 Critical: 2
  🟠 High:     3
  🟡 Medium:   2
  🔵 Low:      1

─── Findings ───────────────────────────────────────────

 CRITICAL  Hardcoded API Key  [secrets-api-key]
  API key found hardcoded in source code. Use environment variables instead.
  at src/config.ts:15
  CWE: CWE-798

 HIGH  Use of eval()  [static-eval]
  eval() executes arbitrary code and is a major security risk.
  at src/handler.ts:42
  CWE: CWE-95

Also Available on PyPI

pip install mcp-security-auditor
mcp-audit scan ./my-mcp-server

Contributing

Issues and PRs welcome! See CONTRIBUTING.md.

License

MIT