Why it matters in practice
This pattern lets an application use a proxy boundary for routing and credential handling instead of embedding an upstream secret in each client. For HTTPS requests that need rewriting, TLS inspection and a trusted proxy certificate authority are part of the connection model. A proxy does not make the upstream service or all outbound traffic safe by itself.
Example
A worker sends a request through its proxy and uses a configured placeholder for a key that the proxy injects into a 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.