I found this one among my browser requests to Cockpit 183: https://myhost:9090/cockpit/$eb66ef5b6a7928a1af12a2229110a2817e5458e8e87fcb0... The returned payload actually seems the negotiated content of po.js language files, concatenated! I searched the docs and code but couldn't find anything about that. Can you help me? Is it considered a "stable" API? Thank you, Davide Principi