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2026-07-29 16:01
REST API

Rate Limit Headers

RetryRequestValidateMedium
Try Interactive Demo

What you will learn

  • Know the algorithm (token bucket, sliding window, fixed window) — bypasses differ per type
  • Test with distributed clients — per-IP limits are trivial to bypass behind a proxy
  • Verify limits reset at the documented time — clock skew between servers breaks limits

Description

Parse and respect rate limit headers in responses.

Test Scenario

const response = await request.get('/api/v1/rate-limited');
const limit = response.headers()['x-ratelimit-limit'];
const remaining = response.headers()['x-ratelimit-remaining'];
console.log(`${remaining}/${limit} requests remaining`);
Endpoint/api/v1/rate-limited

Testing Tips

  • •Check X-RateLimit-Limit header
  • •Check X-RateLimit-Remaining
  • •Check X-RateLimit-Reset timestamp
// Playwright API Testing - REST
import { test, expect } from '@playwright/test';


test('REST API request', async ({ request }) => {
  const response = await request.get('/api/v1/resource');


  expect(response.ok()).toBeTruthy();
  expect(response.status()).toBe(200);


  const data = await response.json();
  expect(data).toBeDefined();
});

Challenge ID: rest-rate-limiting

2 frameworks available

API Playground

Send requests and inspect responses

Endpoint: /api/v1/rate-limited

Press Enter to send