4×× - Client Error

400 Bad Request

The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

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• Source: RFC7231 Section 6.5.1

400 Code References

• Rails HTTP Status Symbol: bad_request
• Go HTTP Status Constant: http.StatusBadRequest
• Symfony HTTP Status Constant: Response::HTTP_BAD_REQUEST
• Python2 HTTP Status Constant: httplib.BAD_REQUEST
• Python3+ HTTP Status Constant: http.client.BAD_REQUEST
• Python3.5+ HTTP Status Constant: http.HTTPStatus.BAD_REQUEST