curl-w32/docs/cmdline-opts/include.md

c	SPDX-License-Identifier	Long	Short	Help	Protocols	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	include	i	Include protocol response headers in the output	HTTP FTP	important verbose	4.8	boolean	verbose	-i $URL

--include

Include response headers in the output. HTTP response headers can include things like server name, cookies, date of the document, HTTP version and more... With non-HTTP protocols, the "headers" are other server communication.

To view the request headers, consider the --verbose option.

Prior to 7.75.0 curl did not print the headers if --fail was used in combination with this option and there was error reported by server.