cURL is one of the most common command-line tools for making HTTP requests, and it has proxy support built directly into its flags.
Basic HTTP proxy usage
Adding the -x flag followed by the proxy address and port routes the request through that proxy — for example, curl -x http://1.2.3.4:8080 https://example.com sends the request via the specified proxy instead of directly.
Using SOCKS5
For a SOCKS5 proxy, prefix the address with socks5:// in the -x flag instead of http://, which tells cURL to negotiate the SOCKS protocol rather than treating it as a standard HTTP proxy.
Adding authentication
If the proxy requires credentials, the -U flag followed by username:password supplies them, or you can embed them directly in the proxy URL passed to -x, similar to how it works in browser and code-based setups.