Use a custom CA certificate file for the HTTPS proxy.
Section: Proxy Auth and Tunnels
Trust a custom CA for proxy TLS
bash
bash
curl --proxy-cacert proxy-ca.pem -x https://proxy.example.com:8443 https://example.comExplanation
Origin CA settings and proxy CA settings are independent.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Proxy Auth and Tunnels
Proxy with basic auth
Authenticate to a proxy with username and password.
Client cert for proxy authentication
Send a client certificate when the proxy requires mTLS.
Tunnel through an HTTP proxy
Use CONNECT tunneling for non-HTTP protocols when needed.
Skip TLS verification for HTTPS proxy
Disable certificate verification for the HTTPS proxy connection.