Client Error (4xx)

HTTP 429 — 429 Too Many Requests

The user has sent too many requests in a given amount of time ("rate limiting").

Common Causes & Diagnoses

•API rate limiter triggered, bot scraping prevention, DDoS mitigation.

Spesifikasyon & Kategori

Status Code:429

Category:Client Error (4xx)

RFC Standard:RFC 9110 / HTTP/1.1 & HTTP/2

Multi-Language Code Implementations

How to Handle, Return & Test HTTP 429

Status: 429 429 Too Many Requests

server.js / handler.ts

// Express.js Server Response
app.get('/api/resource', (req, res) => {
  // Returning 429 429 Too Many Requests
  return res.status(429).json({
    error: '429 Too Many Requests',
    statusCode: 429,
    timestamp: new Date().toISOString()
  });
});

// Client-side fetch error check
const response = await fetch('/api/resource');
if (response.status === 429) {
  console.warn('Received HTTP 429 429 Too Many Requests');
}

💡 Pro Tip: Ensure appropriate error handling middleware or proxy interceptors are enabled so client applications receive structured JSON responses for HTTP 429.

How to Fix / Practical Code Solutions

Include Retry-After Header

Inform client when they can retry requests.

res.set('Retry-After', '60');
res.status(429).json({ error: "Rate limit exceeded. Try again in 60s." });

Other Popular HTTP Status Codes

100 101 200 201 202 204 206 301 302 304 307 308

Frequently Asked Questions

Common Questions About HTTP 429 to RFC Standard

Everything you need to know regarding specifications, syntax, and security best practices.

The user has sent too many requests in a given amount of time ("rate limiting"). In Turkish: İstemci belirlenen zaman aralığında izin verilen istek limitini aştı.