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Using the crypto Web API to redirect requests with a unique token

Learn how to use the Crypto Web API in your Middleware.

DX Team
Knowledge Base
1 min read
Last updated November 11, 2025

The following example shows how to use the crypto Web API in your Middleware to redirect requests with a unique token.

Your middleware file should be placed at the root of your project. If you are using the src directory, the file should be placed in the src directory.

middleware.js
import { NextResponse } from 'next/server';


export const config = {
  matcher: '/',
};


export default function middleware(request) {
  const token = crypto.randomUUID();
  const url = request.nextUrl;


  url.pathname = '/api/crypto';
  url.searchParams.set('token', token);


  return NextResponse.redirect(url);
}
middleware.ts
import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';


export const config = {
  matcher: '/',
};


export default function middleware(request: NextRequest) {
  const token = crypto.randomUUID();
  const url = request.nextUrl;


  url.pathname = '/api/crypto';
  url.searchParams.set('token', token);


  return NextResponse.redirect(url);
}

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Using the crypto Web API to redirect requests with a unique token | Vercel Knowledge Base