List of HTTP Status Codes Cheat Sheet

HTTP status codes are numerical values that are returned by a web server in response to a request made by a client. These codes indicate the status of the request and can provide information about what went wrong, if anything did. There are a variety of different codes that can be returned, but understanding the most common ones is essential for anyone working with or developing for the web.

Each code indicates a specific condition or result of a request. The developers are free to create and modify status codes as they see fit. But it can lead to a lot of confusion. So a list of common codes are maintained by IANA. You can find a list of all status codes here.

HTTP status codes are an important part of any API. They tell the client what happened and can help them troubleshoot any issues. There are a few status codes that are especially important for APIs. The purpose of status codes is to tell the client (which can be a browser, another web app, a mobile app etc) how the response should be processed.

HTTP Status Codes play an important role in HTTP communications by providing status information about the request and response messages. They also help web servers and browsers to communicate with each other. HTTP Status Codes are placed in the header of an HTTP response message, and they specify the result of the request.

For an example, the `401` status code means that the the server could not authorise the requester. The `200` status code means that the request was successful. The `500` status code means that the server encountered an error while processing the request. So if the server sends a `500` status code, usually it's a server error, and there's nothing you (or the Client) can do to fix it. But on the other hand, `401` status code means that the server requires authentication before it will allow the request to be processed. So you should attempt to authenticate the request again before sending it to the server.