Dev UtilitiesLesson 132Free preview

HTTP Status Codes

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Summary

HTTP status code is a three-digit number that a server sends to inform the result of a request. Code 2xx means successful, 3xx means redirect, 4xx means client-side error, and 5xx means server error. Understanding this code speeds up debugging of APIs and websites. The status code is the response metadata, not the requested data content.

Key points

2xx success: 200 OK, 201 Created, 204 No Content
3xx redirect: 301, 302, and 304 Not Modified
4xx client error: 400, 401, 403, 404, and 429
5xx server error: 500 and 503
Use the appropriate status so that the client can handle the response

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