curl/docs/cmdline-opts/proxy-cert.md

c	SPDX-License-Identifier	Long	Arg	Help	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	proxy-cert	<cert[:passwd]>	Set client certificate for proxy	7.52.0	proxy tls	single	proxy-cert-type	--proxy-cert file -x https://proxy $URL

--proxy-cert

Same as --cert but used in HTTPS proxy context.