--capath

Use the specified certificate directory to verify the peer. If curl is built against OpenSSL, multiple paths can be provided by separating them with the appropriate platform-specific separator (e.g. path1:path2:path3 on Unix-style platforms for path1;path2;path3 on Windows).

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 --capath can allow OpenSSL-powered curl to make SSL-connections much more efficiently than using --cacert if the --cacert file contains many CA certificates.

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