@vercel/firewall

Programmatic rate limits

See our Firewall docs for detailed documentation of @vercel/firewall.

import { unstable_checkRateLimit as checkRateLimit } from '@vercel/firewall';

export async function POST() {
  const { rateLimited } = await checkRateLimit('my-rate-limit-id');
  if (rateLimited) {
    return new Response('', {
      status: 429,
    });
  }
  // Implement logic guarded by rate limit
}

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