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lovable.devapi key scannerleaked secretssecret leak scannerAI app security

Lovable.dev API Key Scanner: Find & Fix Leaked Keys Fast

OverMCP Team

July 17, 2026

Quick answer

A Lovable.dev API key scanner helps you detect hardcoded secrets like OpenAI, Stripe, or Supabase keys in your AI-generated code. Run a scan on your repository, review flagged secrets, and replace them with environment variables or a secrets manager. This prevents unauthorized access, data breaches, and unexpected bills.

What to check first

Before diving into fixes, verify these common leak points in your Lovable.dev app:

•Client-side code: Check all JavaScript, TypeScript, and JSX files in your src/ or components/ folders for hardcoded API keys.

•Configuration files: Look at .env, .env.local, config.js, or constants.ts for keys that may have been committed.

•Public source maps: If you deploy with source maps enabled, your original code (including secrets) may be exposed in the browser.

•Git history: Even if you remove a key now, it may still exist in previous commits. Use a scanner that checks full git history.

•Third-party integrations: Lovable.dev often generates code that directly embeds API keys for services like Supabase, Firebase, or Stripe.

•API responses: Check if your backend accidentally returns secrets in error messages or debug endpoints.

Step-by-step fix

1. Scan your repository with a Lovable.dev API key scanner

Use a dedicated secret leak scanner to automatically find exposed keys. These tools scan for patterns like sk-... (OpenAI), pk_live_... (Stripe), AKIA... (AWS), and more.

Example output from OverMCP:

Found 3 potential secrets:
1. OpenAI API Key in src/utils/openai.ts:12
2. Stripe Secret Key in pages/api/checkout.ts:5
3. Supabase Service Role Key in lib/supabaseClient.ts:2

2. Replace hardcoded keys with environment variables

Move all secrets to environment variables (.env.local) and reference them via process.env.

Before (hardcoded):

// src/utils/openai.ts
const openai = new OpenAI({
  apiKey: 'sk-proj-abc123def456', // LEAKED!
});

After (secure):

// src/utils/openai.ts
const openai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

Then add the variable to your .env.local:

OPENAI_API_KEY=sk-proj-abc123def456

3. Add `.env.local` to `.gitignore`

Ensure your .env.local file is never committed:

# .gitignore
.env.local
.env

4. Rotate the leaked keys

Immediately revoke the exposed keys from the provider's dashboard (e.g., OpenAI, Stripe, Supabase). Generate new keys and update your environment variables.

5. Remove secrets from git history

If the key was committed, purge it from git history:

git filter-branch --force --index-filter \
  "git rm --cached --ignore-unmatch path/to/file" \
  --prune-empty --tag-name-filter cat -- --all

Then force push to overwrite history: git push origin --force --all.

6. Set up continuous monitoring

Prevent future leaks by integrating a continuous security monitoring tool that scans every commit and pull request.

Common mistakes

•Assuming only backend code matters: Frontend code is often more exposed—any key in client-side JavaScript is visible to users.

•Using `.env` files in production without proper setup: If you deploy to Vercel or Netlify, you must set environment variables in the dashboard, not rely on .env files.

•Not scanning third-party libraries: Lovable.dev may include packages that contain hardcoded test keys or debug endpoints.

•Ignoring error messages: Some AI-generated apps return full stack traces with environment variables in error responses.

•Only scanning the main branch: Leaked keys often exist in feature branches or older commits.

How OverMCP helps

OverMCP's free AI app security scanner automatically detects leaked API keys, security headers issues, and more in your Lovable.dev app. It integrates with your Git provider and scans every deployment, so you catch secrets before they go public.

FAQ

What is a Lovable.dev API key scanner?

A tool that scans your Lovable.dev project's codebase and git history for exposed API keys and secrets, helping you find and fix leaks before they're exploited.

How do leaked API keys get into my Lovable.dev app?

AI coding tools like Lovable.dev often generate code with hardcoded keys for convenience. If you commit these files or deploy without proper environment variable setup, the keys become public.

Can OverMCP scan my Lovable.dev app for free?

Yes, OverMCP offers a free AI app security scanner that includes a secret leak scanner. You can connect your repository and run a scan immediately.