This is an update site for the Eclipse IDE Integration for ALM Octane, version 12.55.4.
Go to Help > Install New Software, and paste this URL into the dialog box. Follow the on-screen instructions from there.
https://microfocus.github.io/octane-eclipse-plugin/update-site-archive/12.55.4
Latest release: https://microfocus.github.io/octane-eclipse-plugin/update-site
Older versions: https://microfocus.github.io/octane-eclipse-plugin/update-site-archive