429 Too Many Requests

The 429 HTTP response status code is used by the server to indicate that the client has made too many requests within a specific timeframe, often referred to as “rate limiting.”

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Introduction
In Action
Sample
Conclusion

Introduction

The 429 Too Many Requests status code is used by the server to indicate that the client has made too many requests within a specific timeframe, often referred to as “rate limiting.”

This restriction is put in place to prevent abuse and ensure fair access to the server’s resources for all users.

In Action

The 429 Too Many Requests status code is used by the server to notify the client that it has exceeded the allowed number of HTTP requests within a certain timeframe. This can be used, for instance, to limit the number of API calls made in an hour.

The server may identify users by credentials or cookies and can provide additional information through the Retry-After HTTP header to let the client know when it can make requests again. It’s a mechanism to ensure fair usage of server resources and prevent abuse.

Sample

In the example, the client attempts to access a resource, but the server responds with the 429 Too Many Requests error.

This indicates that the client has made too many requests within a certain time frame, and the server is temporarily limiting access to prevent overload and ensure fair usage for all users. The client may need to wait for a specified period or adjust its request frequency before trying again.

Request

GET /current-news HTTP/1.1
Host: www.example.com

Response

HTTP/1.1 429 Too Many Requests
Retry-After: 1800
Content-Type: text/html
Content-Length: 173

< html>
< head>
< title>Request Limit Exceeded< /title>
< /head>
< body>
< p>Your request limit has been reached. Please try again in 30 minutes.< /p>
< /body>
< /html>

Conclusion

The 429 Too Many Requests status code indicates that the server has received too many requests from the client within a specific time period. This is commonly used for rate limiting to prevent overloading the server and ensure fair access for all users.

The client may need to wait for a designated time or adjust its request frequency to avoid encountering this error in the future.