Where can I find this plugin

[Speed]

Basically a crate plugin but with command keys instead of keys like a trip wire hook. It's not a real key but you can type /key or any command and it shows how many keys you have, but other than that just a normal crate plugin.

 

[Shattered]

keycrate? right?

 

[Mermaid]

It's called CrateKeys, I have this on my server and it's also used on popular servers like VortexPvP: https://www.spigotmc.org/resources/cratekeys.1040/

 

[Dragon]

I'm not sure if this is what you want but: In the plugin 'Crates Reloaded' there's a menu crate which you can do /crate or something and it will open a menu where you can use the crates, etc.

 

[PhaseClan]

I think he's looking for a virtual way to open the crate, nobody the examples given arw what he's looking for at all. I have to say I'm not sure why you want it this way, but I don't think this has been made yet.