HTTP 429 Too Many Requests — What It Means & How to Fix It

Overview

The HTTP 429 Too Many Requests status code indicates the user has sent too many requests in a given time period and is being rate limited.

Key Details

• This status code is defined in RFC 6585 for rate limiting.
• The response should include a Retry-After header indicating when to retry.
• Rate limits protect servers from being overwhelmed by too many requests.
• Different API endpoints may have different rate limits.
• Rate limits may be per user, per IP address, or per API key.

Common Causes

• The client exceeded the API rate limit for the given time window.
• Too many concurrent requests from the same IP address.
• A script or bot is making requests too frequently.
• Multiple users sharing the same API key are collectively exceeding the limit.

Steps

1. 1Check the Retry-After header to know when you can send the next request.
2. 2Implement exponential backoff in your retry logic.
3. 3Reduce the frequency of your requests to stay within rate limits.
4. 4Cache responses to avoid unnecessary repeated requests.
5. 5Contact the API provider to request a higher rate limit if needed.

Tags

Related Items

More in 4xx Client Error

Frequently Asked Questions