---
set: 4
code: 400
title: Bad Request
references:
    "Rails HTTP Status Symbol": "bad_request"
---

The 400 Bad Request status code indicates that 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>