--proxy-capath

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

Use the specified certificate directory to verify the proxy. Multiple paths can be provided by separating them with colon (:) (e.g. path1:path2:path3). The certificates must be in PEM format, and if curl is built against OpenSSL, the directory must have been processed using the c_rehash utility supplied with OpenSSL. Using --proxy-capath can allow OpenSSL-powered curl to make SSL-connections much more efficiently than using --proxy-cacert if the --proxy-cacert file contains many CA certificates.

If this option is set, the default capath value is ignored.