---
set: 4
code: 406
title: Not Acceptable
references:
"Rails HTTP Status Symbol": ":not_acceptable"
---
The target resource does not have a current representation that would be
acceptable to the user agent, according to the proactive negotiation header
fields received in the request[1](#ref-1), and the server is
unwilling to supply a default representation.
The server SHOULD generate a payload containing a list of available
representation characteristics and corresponding resource identifiers from which
the user or user agent can choose the one most appropriate. A user agent MAY
automatically select the most appropriate choice from that list. However, this
specification does not define any standard for such automatic selection, as
described in [RFC7231 Section 6.4.1][3].
---
* 1 Content Negotiation
[RFC7231 Section 5.3][2]
* Source: [RFC7231 Section 6.5.6][1]
[1]:
[2]:
[3]: