Guide
How to Add Authentication to Your Vibe-Coded App
You built your app in 20 minutes with AI. Here's how to add real auth in 5 more — without writing security code.
Vibe coding changed how we build software. You describe what you want, and tools like Cursor, Claude Code, and Windsurf generate working apps in minutes. But there's one thing every app needs that AI consistently gets wrong: authentication.
Not because the code doesn't work — it does. It compiles, users can sign up and log in, and everything looks fine. The problem is what's missing. No rate limiting. No token rotation. Weak password hashing. Sessions that can't be revoked. The code passes the demo test but fails the security test.
Why AI gets auth wrong
When you prompt “add authentication to my app,” the AI gives you exactly what you asked for — a signup form, a login endpoint, and a session cookie. But authentication isn't a feature. It's a security system with dozens of requirements that no single prompt captures:
- How are passwords hashed? AI uses bcrypt. The current OWASP standard is Argon2id.
- Can tokens be revoked? AI generates stateless JWTs. If one is stolen, it's valid for days.
- What stops brute force attacks? AI adds no rate limiting.
- What about password resets? AI doesn't build reset flows.
- CSRF? User enumeration? Timing attacks? Not on AI's radar unless you ask.
You don't know what to ask for because you'd need to already understand authentication security to write the right prompt.
The two ways to solve this
You have two options: outsource auth to a provider, or become a security expert yourself.
If you're vibe coding, you're optimizing for speed. You want to ship. Learning OWASP password policies and JWT key rotation strategies isn't on your roadmap — and it shouldn't have to be.
VibeLogin was built for exactly this. It gives you production-ready auth without writing security code. There are two ways to set it up:
Option A: From your AI IDE Recommended
If you're already working in Cursor, Claude Code, or Windsurf, add the VibeLogin MCP server. Then just say “add authentication to my app.”
The MCP server creates your project, enables your login methods (email/password, magic links, OAuth), and scaffolds all the files. You never leave your editor.
you > "add auth to my app"
vibelogin · Creating project… ✓
vibelogin · Configuring Google OAuth ✓
vibelogin · Scaffolding auth files… ✓
Done. 4 files written.Option B: Drop in the Next.js component
npm install @vibelogin/nextjs
import { VibeLogin } from "@vibelogin/nextjs/components";
export default function LoginPage() {
return <VibeLogin slug="my-app" />;
}The component auto-detects your enabled auth methods — email/password, magic links, email OTP, OAuth. One component, zero config.
What you get vs. what AI generates
| Security measure | AI-generated | VibeLogin |
|---|---|---|
| Password hashing | bcrypt (cost 10) | Argon2id (19 MiB, 2 iter) |
| JWT signing | HS256, shared secret | RS256, per-project RSA keys |
| Token lifetime | 7 days, no refresh | 15-min access + 7-day refresh |
| Session revocation | Not possible | Instant revoke |
| Rate limiting | None | Per-IP, per-endpoint |
| User enumeration | Leaks registered emails | Dummy hash timing protection |
| CSRF protection | None | State parameter + SameSite |
| Email verification | None | Built-in |
| Password reset | None | Secure reset via email |
| Magic links | None | Built-in |
| Email OTP | None | Built-in |
| OAuth | Complex manual setup | Toggle in dashboard |
Built for how developers work now
VibeLogin isn't another enterprise auth platform with a 30-page setup guide. It was built for developers who ship with AI:
- IDE-first: Install from Cursor, Claude Code, or Windsurf with a single prompt
- Open source SDKs: MCP server and Next.js SDK — both open source
- No dashboard required: Your AI agent configures everything
- Free during beta: No credit card, no usage limits
You built your app with AI. Now add auth the same way.
Free during beta. No credit card required. 5 minutes to set up.