Expectation Failed

Client Error

The server cannot meet the requirements of the Expect request-header field

Expect header can't be satisfied

How this status code appears in HTTP responses

HTTP Response Header

HTTP/1.1 417 Expectation Failed

cURL Example

curl -I https://example.com
# Returns: HTTP/1.1 417 Expectation Failed

This is a client error response indicating the request contains bad syntax or cannot be fulfilled.

Other codes in the same category

The server cannot process the request due to client error

Authentication is required and has failed or has not been provided

Reserved for future use in digital payment systems