No, that would not be appropriate, since there is no “Expect” header you could send in the request to get a successful response. From RFC 9110, HTTP Semantics:

No, that would not be appropriate, since there is no “Expect” header you could send in the request to get a successful response. From RFC 9110, HTTP Semantics: The 417 (Expectation Failed) status code indicates that the expectation given in the request's Expect header field (Section 10.1.1) could not be met by at least one of the inbound servers. — <https://www.rfc-editor.org/rfc/rfc9110#name-417-expectation-failed https://www.rfc-editor.org/rfc/rfc9110#name-417-expectation-...>