The engine supports setting the proxy per connector in a Z39.50 session in Z39.50 search. This feature is implemented by adding a proxy parameter for the Z39.50 database. Only the direct proxy mode is supported.
Example 4.3. Z39.50 session using proxy
IP/Proxy:
Z> open localhost:7999/google?proxy=localhost:3128
or on the command line:
$ yaz-client 'localhost:7999/google?proxy=localhost:3128'