Why it matters in practice
The name describes a protocol role and does not specify whether the proxy connection itself is encrypted. Credentials and request contents sent to an HTTP proxy need protection appropriate to the network. For HTTPS destinations, an ordinary CONNECT tunnel carries opaque TLS unless the proxy separately terminates or inspects it.
Example
A client sends an HTTP request to its configured proxy, which makes the corresponding upstream request to api.example.com.
Educational note
This definition is general information, not legal advice. It may omit facts that matter to a specific situation and does not establish or guarantee compliance.