httpstatuses/contents/codes/405.md

set	code	title	references
4	405	Method Not Allowed	Rails HTTP Status Symbol :method_not_allowed

The method received in the request-line is known by the origin server but not supported by the target resource.

The origin server MUST generate an Allow header field in a 405 response containing a list of the target resource's currently supported methods.

A 405 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls¹.

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• ¹ Calculating Heuristic Freshness RFC7234 Section 4.2.2
• Source: RFC7231 Section 6.5.5