Node's built-in fetch (undici) does not read HTTP_PROXY/HTTPS_PROXY/NO_PROXY. Supplying a
custom fetch (for example one bound to an undici ProxyAgent dispatcher) is the supported way
to route requests through a corporate egress proxy or otherwise customise transport.
Custom fetch implementation signature.
Node's built-in fetch (undici) does not read HTTP_PROXY/HTTPS_PROXY/NO_PROXY. Supplying a custom fetch (for example one bound to an undici ProxyAgent dispatcher) is the supported way to route requests through a corporate egress proxy or otherwise customise transport.