How to Deploy Railway Securely (2026)

Before you push anything, search your codebase for variables that should stay secret but are named with a client-visible prefix:

# Find VITE_ and NEXT_PUBLIC_ vars in your source
grep -r "VITE_\|NEXT_PUBLIC_" src/ --include="*.ts" --include="*.tsx" --include="*.js"

Any VITE_ or NEXT_PUBLIC_ variable gets compiled into your JavaScript bundle at build time. It's not a runtime secret. Any visitor can find it in browser DevTools under Sources or by running strings dist/assets/index.js | grep -E "sk-|Bearer".

The rule: if it's a real secret (API key, database password, webhook signing key), rename it to drop the prefix and only read it in server-side code.

Open your service in Railway's dashboard and go to Variables. Add each secret there with a plain name (no framework prefix).

Railway provides two useful environment variables automatically:

• RAILWAY_ENVIRONMENT: set to production, staging, etc. depending on your environment. Use this for conditional logic instead of hard-coding environment checks.
• RAILWAY_SERVICE_NAME: the name of your service, useful for logging.

# What you want in Railway Variables tab
OPENAI_API_KEY=sk-...
STRIPE_SECRET_KEY=sk_live_...
DATABASE_URL=postgresql://...  # from the Connect tab

Never commit a .env file with real credentials. Use .env.example with placeholder values for documentation.

If your frontend is calling OpenAI, Stripe, or any service that requires a secret key, create a server-side proxy route. The client calls your proxy, your proxy calls the external service.

Here's a minimal Express proxy for OpenAI:

// src/server/routes/ai.ts
import express from "express";
import OpenAI from "openai";

const router = express.Router();
const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });

router.post("/chat", async (req, res) => {
  const { message } = req.body;
  const completion = await openai.chat.completions.create({
    model: "gpt-4o-mini",
    messages: [{ role: "user", content: message }],
  });
  res.json({ reply: completion.choices[0].message.content });
});

export default router;

Your frontend calls /api/chat with the message. The OPENAI_API_KEY stays on the server, never reaches the browser.

Railway gives every service a private hostname that ends in .railway.internal. Database traffic over this address never hits the public internet and doesn't count against your egress.

In your database service, open the Connect tab and copy the Private URL. It looks like:

postgresql://postgres:password@postgres.railway.internal:5432/railway

Set that as DATABASE_URL in your backend service's variables. Your backend and database must be in the same Railway project for the private network to route correctly.

The public URL (*.rlwy.net) still works, but routing database connections through it exposes your database to the internet. Use private networking in production.

Railway doesn't inject security headers automatically. Add them in your application with the helmet middleware for Node.js apps:

npm install helmet

// src/server/index.ts
import express from "express";
import helmet from "helmet";

const app = express();
app.use(helmet());
// Helmet sets: X-Frame-Options, X-Content-Type-Options,
// Strict-Transport-Security, Content-Security-Policy, and others

If you're using a Python backend (FastAPI or Flask), the equivalent is the secure package or adding headers manually in middleware.

For a React/Vue/Svelte frontend deployed on Railway (not Netlify), you can also add headers via a custom server file or a reverse proxy config.

Before you point a real domain at your Railway app, run a CheckYourVibe scan on the Railway URL. It checks for:

• API keys present in your JS bundle
• Missing security headers
• CORS configured too broadly (Access-Control-Allow-Origin: * on an API that handles auth)
• Exposed database connection info

Run the scan on your staging environment while it's still safe to fix things. Findings on a live app are harder to rotate because real users may already have the leaked credentials cached.