Hexpose

This mod compiles a lot of useful features involving scrying information into one addon. Every potentially useful scrying—getting an entity's health, getting how much air it has left, getting how much saturation food will give you, getting the contents of a container, reading the book from a chiseled bookshelf, getting how many turtle eggs are in a block—has a pattern dedicated to it.

Not only that, it serves as the library mod containing useful iotas related to scrying. Currently, these are:

• text iotas. They are similar to strings but with built-in support for Minecraft text formatting.
• item stack iotas. These contain nearly all information an item can have and are used by this mod or other addons to process items as data.
• identifier iotas. These represent an identifier such as minecraft:diamond and are used for type-checking items, blocks, entities, dimensions, villager types, etc... If you add in other addons that rely on it, they can process particles and sounds too.