Does 0patch Agent Installer support silent (unattended) installation?

(Note: this is an Enterprise feature.)

Yes. 0patch Agent Installer supports silent(unattended) installation using command-line arguments or a transform file. Such installation also supports auto-registration, whereby you don’t need to manually provide credentials to have the Agent registered on 0patch server.

Please refer to 0patch Agent User Manual, section "Silent Installation and Auto-Registration" for more details.