cURL (Client URL) is a free, open-source command-line tool.
If you want to request a URL via cURL using a HTTP/SOCKS proxy, follow this guide to make it happen.
SOCKS Proxy:
curl -x "socks5://address:port" "https://ipinfo.io"
HTTP Proxy:
curl -x "http://address:port" "https://ipinfo.io"
If you don't have a proxy, get a free one now.
Check the cURL manual with this command:
curl --help