Definition of HTTP Status Error Codes

HTTP status error codes indicate the outcome of a request and help identify issues in client-server communication. This document provides an overview of common error codes, including their descriptions and possible causes, to help troubleshoot and resolve problems effectively.

• 400 Bad Request:

  • Description: The server cannot understand or process the request due to a client error.

  • Reasons: The request may contain incorrect parameters, be improperly formatted, or include incompatible request content.

• 401 Unauthorized:

  • Description: The request lacks valid authentication credentials for the target resource.

  • Reasons: The user does not have the necessary permissions to access a protected resource, or the authentication credentials are invalid.

• 403 Forbidden:

  • Description: The server understood the request, but the server refuses to authorize it.

  • Reasons: The user lacks the necessary permissions to access the requested resource.

• 404 Not Found:

  • Description: The server cannot find the requested resource.

  • Reasons: The specified URL or file does not exist on the server.

• 429 Too Many Requests:

  • Description: The user has sent too many requests in a given amount of time.

  • Reasons: The server has applied a rate-limiting mechanism due to frequently repeated requests.

• 500 Internal Server Error:

  • Description: The server encountered an internal error and cannot fulfill the request.

  • Reasons: An unexpected condition occurred on the server, preventing it from processing the request.