Fix Missing SSL Certificate in Vibe-Coded Apps: Step-by-Step Guide

Quick answer

To fix a missing SSL certificate in a vibe-coded app, deploy to a platform that provides automatic HTTPS (like Vercel or Netlify) and ensure your DNS records point to the platform. If you use a custom domain, add a CNAME record pointing to your deployment URL—SSL is typically provisioned automatically within minutes. For manual setups, use Let's Encrypt with Certbot or a reverse proxy like Nginx.

Why vibe-coded apps often miss SSL

AI coding tools like Cursor, Bolt.new, and v0 generate frontend and backend code quickly, but they don't configure deployment infrastructure. When you deploy a vibe-coded app, SSL/TLS certificates are usually handled by the hosting platform, not the code itself. Common pitfalls include:

What to check first

Before diving into fixes, verify these basics:

Step-by-step fix

1. Deploy to an auto-SSL platform

Most modern platforms provide free SSL certificates via Let's Encrypt out of the box. If you haven't deployed yet, choose one of these:

Example: Deploying a Next.js app built with Cursor to Vercel:

# Install Vercel CLI
npm i -g vercel

# Deploy
vercel --prod

Vercel automatically provisions an SSL certificate for your-app.vercel.app.

2. Add a custom domain

If you use a custom domain (e.g., myapp.com), add it in your platform's dashboard:

After adding the domain, update your DNS provider (e.g., Cloudflare, Namecheap) with the record. SSL is provisioned automatically within a few minutes.

3. Force HTTPS in your code

Even with SSL, your app may still serve insecure content. Add HTTP to HTTPS redirects and use relative URLs or https:// explicitly.

Next.js (App Router): In next.config.js:

// next.config.js
module.exports = {
  async redirects() {
    return [
      {
        source: '/:path*',
        has: [{ type: 'header', key: 'x-forwarded-proto', value: 'http' }],
        destination: 'https://:path*',
        permanent: true,
      },
    ];
  },
};

Alternatively, set environment variable NEXT_PUBLIC_SITE_URL to https://yourdomain.com and use it for absolute URLs.

Node.js/Express:

// server.js
app.use((req, res, next) => {
  if (req.headers['x-forwarded-proto'] !== 'https') {
    return res.redirect(301, `https://${req.headers.host}${req.url}`);
  }
  next();
});

4. Fix mixed content issues

AI-generated code often includes hardcoded http:// URLs for API calls, images, or scripts. Search your codebase for "http://" and replace with either:

Example using environment variables in a vibe-coded React app:

// .env.local
NEXT_PUBLIC_API_URL=https://api.myapp.com

// component
fetch(process.env.NEXT_PUBLIC_API_URL + '/data')

5. Manual SSL (self-hosted or VPS)

If you're not using a platform with auto-SSL, set up Let's Encrypt manually:

# Install Certbot (Ubuntu)
sudo apt update
sudo apt install certbot python3-certbot-nginx

# Obtain certificate
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com

# Auto-renewal is usually configured automatically; verify:
sudo certbot renew --dry-run

Common mistakes

How OverMCP helps

Instead of manually checking for SSL issues, use a free AI app security scanner to automatically detect missing certificates, mixed content, and other misconfigurations. OverMCP integrates with your Vercel or GitHub account to continuously monitor your vibe-coded apps—so you never ship without HTTPS again.

FAQ

How long does it take for an SSL certificate to be issued after adding a custom domain?

On platforms like Vercel and Netlify, SSL certificates are typically issued within 1–5 minutes after DNS propagation. DNS changes can take up to 48 hours, but often resolve within minutes.

Can I use a free SSL certificate for my vibe-coded app?

Yes. Let's Encrypt provides free certificates, and most hosting platforms (Vercel, Netlify, Render) include them automatically. There's no need to purchase a certificate.

Why does my vibe-coded app show "Not Secure" in the browser?

This usually means the page is served over HTTP instead of HTTPS, or there's mixed content (insecure resources loaded on an HTTPS page). Check your URL bar for the protocol and use the browser's DevTools to find insecure requests.