--- set: 4 code: 406 title: Not Acceptable references: "Rails HTTP Status Symbol": ":not_acceptable" --- The 406 (Not Acceptable) status code indicates that 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 ([RFC7231 Section 5.3][2]), 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]. Source: [RFC7231 Section 6.5.6][1] [1]: [2]: [3]: