Roomopolis

Roomopolis allow you to create custom keys through Kubejs to place templates in world. Keys can be built in kubejs 

StartupEvents.registry('item', event => {
//Create a custom key item like this
event.create("test_key", 'roomopolis_key')
//String location of the template you want to spawn example file is found here data/roomopolis/structures/tiny_room.nbt
.templateId("roomopolis:tiny_room")
//The structure is always placed a block behind the block you click on as the player, the height adjustment allows you to adjust the height postion the template is spawned
.heightAdjustment(1)
//keyBlock is optional and not needed, if a block is defined here keys will only work on that block
.keyBlock("minecraft:iron_block")
})

Discord

Join my discord below for more information, reporting bugs or features that you want added:

https://discord.gg/benbenlaw