---
set: 4
code: 400
title: Bad Request
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"
---

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).

---

* Source: [RFC7231 Section 6.5.1][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.5.1>