AdminMode

This server-side only mod allows server OPs to ender “Admin Mode” from survival. When entering admin mode, your survival inventory is saved, and then cleared in order to not risk loosing any of your items. 

The config value enter_on_gamemode_change in the server config adminmode-server.toml can be enabled in order to make players that switch to creative automatically enter admin more, and exit it when switching back to survival.