env-secret-exposure-analyzer-mcp

Scans projects for secret exposure risks in .env files and logs

GitHub

🔐 env-secret-exposure-analyzer-mcp

npm CI License: MIT

Your AI agent is one debug session away from leaking your secrets.

MCP server that scans your project for secret exposure risks — hardcoded API keys, unprotected .env files, and console.log calls that print credentials at runtime. Before your agent accidentally reads them out loud.

🤔 The problem

You ask your AI agent to debug a config issue. It reads src/config.ts. Inside:

console.log('Config loaded:', JSON.stringify(config));
console.log(process.env.DATABASE_PASSWORD);

The agent now has your database password in its context. It might log it, include it in a summary, or pass it to another tool. And your .env isn't in .gitignore, so the next git push will do the rest.

None of this requires the agent to be malicious. It just needs to be helpful.

env-secret-exposure-analyzer-mcp catches this before it happens. 🔐

🛠️ Tools

scan_for_secrets

Scans source files, config files, and .env files for 20+ secret patterns. Returns file path, line number, severity, and a masked preview — never the full value.

Detects:

  • AWS access keys + secret keys
  • GitHub tokens (ghp_, gho_, ghs_)
  • Stripe secret/publishable keys + webhook secrets (whsec_)
  • Anthropic, OpenAI API keys
  • SendGrid (SG.xxx), Twilio auth token + account SID
  • Google API keys + OAuth client secrets (GOCSPX-)
  • Slack tokens (xox*)
  • Private keys (-----BEGIN ... PRIVATE KEY-----)
  • Database URLs with embedded credentials (postgres://user:pass@host)
  • JWT secrets, session secrets, encryption keys
  • Sentry DSN, Datadog API key
  • Generic hardcoded passwords, secrets, tokens
Secret Scan Results
  Project:       /project
  Files scanned: 24
  Findings:      5

  [CRITICAL] .env:3 — AWS Access Key
    Preview: AKIA****MPLE
  [CRITICAL] .env:7 — Database URL with password
    Preview: post****sswd
  [CRITICAL] src/auth.ts:12 — Hardcoded JWT secret
    Preview: my-s****ecret
  [HIGH] .env:14 — Hardcoded session secret
    Preview: sess****key!
  [MEDIUM] .env:28 — Sentry DSN
    Preview: http****7890

check_gitignore_coverage

Checks whether sensitive files (.env, .env.local, secrets.json, private keys, certificates) are covered by .gitignore. Flags files that could be accidentally committed.

Gitignore Coverage Check
  Project: /project

  ✗ .env → Add to .gitignore: .env
  ✗ .env.local → Add to .gitignore: .env.local
  ✓ secrets.json

scan_for_log_leaks

Scans source files for console.log / logger calls that print process.env variables or objects with secret-sounding names at runtime. Catches the most common "it's just a debug line" mistakes.

Log Leak Scan
  Project:       /project
  Files scanned: 18
  Findings:      3

  [CRITICAL] src/config.ts:8
    console.log("Config loaded:", JSON.stringify(config));
  [HIGH] src/server.ts:42
    console.log(process.env.AWS_SECRET_ACCESS_KEY);
  [HIGH] src/db.ts:15
    logger.info({ password: dbConfig.password });

🧪 What it looks like in practice

A realistic .env with 20 secrets — database URLs, AWS, Stripe, Twilio, SendGrid, Google OAuth, Sentry, JWT secrets, encryption keys. Before this MCP: an AI agent reads the file, has no idea what's sensitive, and proceeds to use those values in generated code or responses.

After one scan_for_secrets call: 16 findings, all categorized by severity, all previews masked. The agent knows exactly what's dangerous before it touches anything.

⚡ Setup

{
  "mcpServers": {
    "secret-scanner": {
      "command": "npx",
      "args": ["-y", "env-secret-exposure-analyzer-mcp"]
    }
  }
}

🚀 Usage

"Scan this project for any secrets or API keys that might be exposed. Check if .env files are in .gitignore, and look for any console.log calls that might be leaking credentials."

The agent runs all three tools in sequence and reports a full picture: what's hardcoded, what's not protected, what's being logged.

Works great alongside:

📦 Links

License

MIT

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