Hi!
I made a command-line interface for Orthanc: https://github.com/Ch00k/orthanc-cli. The project is written in Rust, and uses the Rust client for Orthanc REST API: https://github.com/Ch00k/orthanc-rs
The CLI interface implements many of the features you see on web UI, and more. It does not cover all the functionality of Orthanc REST API yet, but it is still a work in progress. It is tested with Orthanc 1.6.x, 1.7.x, 1.8.x.
To try it out you can download the latest release for your platform here: https://github.com/Ch00k/orthanc-cli/releases
I hope folk will find the CLI tool useful, and would appreciate any kinds of feedback on it.