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HTTP Status Code

A numeric code in an HTTP response that summarizes the result of the request.

Motivation

HTTP status codes solve the problem of communicating what happened to a request in a standard way.

Where it fits

HTTP Status Code belongs to HTTP and API design.

Mental model

Status codes are coarse outcome signals: success, redirection, client error, or server error.

Common mistakes

Returning 200 for failed operations.
Leaking internal details through error responses.

HTTP Status Code connects to HTTP, REST, API, error handling, and observability.