Minimal item config

The minimal config that you put inside your item files looks like this:

{
  "key": "test:test_item",
  "material": "minecraft:paper",
  "displayName": "<blue>Test Item"
}

In the next chapters you will learn about more features of the item configuration but for now this is all you will need.

The key field is the key your item will be identified with. It consists of a first part, the namespace, and a second part the key. The namespace should be the name of the group of items you want to create or for plugin developers the name of their plugin. The both parts should be all lowercase and may separate words with underscores. The second part may contain slashes to further group items.¹

The material field is a simple minecraft item identifier used in command. You can find these on the unofficial Minecraft Wiki's page of the item. For paper for example you can find the key here. The namespace will always be minecraft.

The displayName field is a MiniMessage component. This allows you to format the name of your item with modern formatting features like RGB colors.

This will add a new item with the identifier test:test_item made out of paper to Liquip. If you give it to yourself with /liquip give test:test_item it will have the name Test Item colored in blue.

¹ For further information read this.