NBT API 2.1.0

Add custom NBT tags or modify tags of Items/Entities/Tiles without NMS!

  1. tr7zw
    Tested Minecraft Versions:
    • 1.7
    • 1.8
    • 1.9
    • 1.10
    • 1.11
    • 1.12
    • 1.13
    • 1.14
    Source Code:
    (Item/Entity/Tile) NBT API
    [​IMG] [​IMG] [​IMG] [​IMG]
    The NBT API allows you to add custom NBT tags to Itemstacks, TileEntities and Entities, or modify excisting ones!
    It completely uses reflections to interact with NMS code and works with all the latest versions. On server start the plugin checks all reflections.

    Tested on Spigot
    • (1.7*)1.8.8-1.14.4
    • The NBTInjector will not work with: 1.12.0, 1.12.1, 1.13.0 (Please just update to the final release of your choosen version)
    • On startup you will get a notification if there is a version problem!
    * 1.7 Notes: Use a 1.7 with R4 (1.7.10), NBTLists may not work, everything using Gson is disabled(Add Gson before the NBTAPI loads, to turn it back on), and you can't get the NBTTypes, because 1.7 is missing this feature. TLDR: 1.7.10 is somewhat broken and may not work.

    What do I have to do as server owner?
    Just download the jar and drop it in the plugins folder. Done.
    Note that outdated plugins may ask for "ItemNBTAPI". In this case download the version 1.8.3 from the versions tab. The outdated "ItemNBTAPI" and "NBTApi" can be used at the same time.
    Important for version 2.0.0: Don't reload. Reloading in general is a horrible thing and it will break the NBTInjector in horrible ways! When updating plugins/changing configs always restart the server normally!

    How can I use the API as developer?
    Create the NBT Wrapper:
    Code (Text):
    NBTItem nbti = new NBTItem(item);
    NBTEntity nbtent = new NBTEntity(zombie); //Only for vanilla tags!
    NBTTileEntity tent = new NBTTileEntity(block.getState()); //Only for vanilla tags!
    NBTFile file = new NBTFile(new File(getDataFolder(), "test.nbt"));
    NBTContainer container =  new NBTContainer(json); //Parse in json
    Add/Get/Override NBT tags:
    Code (Text):
    nbti.setString("Stringtest", "Teststring");
    nbti.setInteger("Inttest", 42);
    nbti.setDouble("Doubletest", 1.5d);
    nbti.setBoolean("Booleantest", true);
    //More are avaible!
    //Get all Tags
    //Check for an tag
    //Remove a tag
    nbti.setString("Stringtest", null);
    //Create NBTTagCombounds(Imagine folders)
    //Get Compound
    NBTCompound comp = nbti.getCompound("subtag");
    //Get Compound parent(null at root)
    //Save Objects via Gson
    nbti.setObject("myobject", new SimpleJsonTestObject());
    //Get Objects
    SimpleJsonTestObject simpleObject = nbti.getObject("myobject", SimpleJsonTestObject.class);
    //Merge the data from compound A into B (Like the /data merge command)
    //Get the nbt as json

    //Access/create lists
    And finally get back the Bukkit Itemstack(Changes on Tiles/Entities will happen directly):
    Code (Text):
    Saving the NBTFile:
    Code (Text):
    Important note regarding Tiles/Entities
    Non-vanilla tags can't usually be added to to Tiles/Entities. Thanks to
    inventivetalent the NBTAPI now includes a tool called "NBTInjector", that compiles custom (Tile-)Entity classes during runtime to allow custom nbt. The custom data will remain during chunk unloads/server restarts. Data will be lost when chunks get loaded without the NBTAPI loaded! Since 2.1.0 the NBTInjector won't be enabled by default! Please enable it during onLoad with NBTInjector.inject(); if you are using it!
    Adding custom nbt to tiles:
    Code (Text):

    NBTCompound comp = NBTInjector.getNbtData(block.getState());
    comp.setString("Foo", "Bar");
    Adding custom nbt to entities:
    Code (Text):

    Entity ent = world.getEntitiesByClasses(Animals.class, Monster.class).iterator().next();
    ent = NBTInjector.patchEntity(ent); //This needs to be called at least once on the entity to enable custom nbt!
    NBTCompound comp = NBTInjector.getNbtData(ent);
    comp.setString("Hello", "World");
    Note: Before NBTInjector.getNbtData can be used on an Entity, NBTInjector.patchEntity has to be used on it at least once. This method will check if the entity is patched, and if not remove the entity and respawn it with the correct class. This destroys the original entity reference(the new one is returned) and the entity will blink once ingame. Bestcase you call this method right when the entity is spawned to prevent unwanted behavior(the blink, entities interacting with the Entity beeing patched like riding/leashes/combat may have problems).

    (Historicly it was Jitpack. Don't use it anymore!)
    NBTApi is hosted and compiled by CodeMC.
    JenkinsBuild CodeMC-Info
    Code (Text):
    <!-- CodeMC -->
    The API can be used in different ways:
    Just use the Plugin as Maven dependency and remember to add "NBTAPI" as dependency into the plugin.yml. This way server owners will have to install the api and keep it updated.
    Code (Text):

    Using this method the API gets copied into your plugin. Server owners don't have to install the API on their own, but you need to keep it updated. Also relocating is required!
    Code (Text):

                  <shadedPattern>YOUR PACKGE WHERE THE API SHOULD END UP</shadedPattern>

    Example Code
    Code (Text):

     Zombie z = (Zombie) b.getWorld().spawnEntity(b.getLocation().add(0, 1, 0), EntityType.ZOMBIE);
                    NBTEntity nbtent = new NBTEntity(z);
                    nbtent.setByte("CanPickUpLoot", (byte) 1);
                    NBTList list = nbtent.getList("Attributes", NBTType.NBTTagCompound);
                    for(int i = 0; i < list.size(); i++){
                        NBTListCompound lc = list.getCompound(i);
                            lc.setDouble("Base", 0.5d);

    Code (Text):

                    NBTEntity nbtent = new NBTEntity(zombie);
                    nbtent.mergeCompound(new NBTContainer("{Silent:1b,Invulnerable:1b,Glowing:1b,IsBaby:1b}"));

    Code (Text):

            ItemStack head = new ItemStack(Material.SKULL_ITEM, 1, (short) 3);
            NBTItem nbti = new NBTItem(head);
            NBTCompound disp = nbti.addCompound("display");
            disp.setString("Name", "Testitem");
            NBTList l = disp.getList("Lore", NBTType.NBTTagString);
            l.addString("Some lore");
            NBTCompound skull = nbti.addCompound("SkullOwner");
            skull.setString("Name", "tr7zw");
            skull.setString("Id", "fce0323d-7f50-4317-9720-5f6b14cf78ea");
            NBTListCompound texture = skull.addCompound("Properties").getList("textures", NBTType.NBTTagCompound).addCompound();
            texture.setString("Signature", "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");
            texture.setString("Value", "eyJ0aW1lc3RhbXAiOjE0OTMwNDkwMTcxNTIsInByb2ZpbGVJZCI6ImZjZTAzMjNkN2Y1MDQzMTc5NzIwNWY2YjE0Y2Y3OGVhIiwicHJvZmlsZU5hbWUiOiJ0cjd6dyIsInNpZ25hdHVyZVJlcXVpcmVkIjp0cnVlLCJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYTI3NDZlNWU5OGMwZWRmZTU1YTI3ZGRjNjUxMmJmNjllYzJiYmNlNmM3ZmNhNTQ5YmEzNjZkYThiNTRjZTRkYiJ9fX0=");

            NBTList attribute = nbti.getList("AttributeModifiers", NBTType.NBTTagCompound);
            NBTListCompound mod1 = attribute.addCompound();
            mod1.setInteger("Amount", 10);
            mod1.setString("AttributeName", "generic.maxHealth");
            mod1.setString("Name", "generic.maxHealth");
            mod1.setInteger("Operation", 0);
            mod1.setInteger("UUIDLeast", 59664);
            mod1.setInteger("UUIDMost", 31453);

            nbti.setInteger("HideFlags", 4);
            nbti.setBoolean("Unbreakable", true);
            head = nbti.getItem();

    Code (Text):

                    Ocelot m = (Ocelot) e.getPlayer().getWorld().spawnEntity(e.getPlayer().getLocation(), EntityType.OCELOT);
                    NBTEntity ent = new NBTEntity(m);
    Code (Text):

    -AgeLocked: 0b
    -HurtByTimestamp: 0
    -CatType: 0
    -Leashed: 0b
    -Health: 10.0f
    -Sitting: 0b
    -Attributes: [0:{Base:10.0d,Name:"generic.maxHealth"},1:{Base:0.0d,Name:"generic.knockbackResistance"},2:{Base:0.30000001192092896d,Name:"generic.movementSpeed"},3:{Base:0.0d,Name:"generic.armor"},4:{Base:0.0d,Name:"generic.armorToughness"},5:{Base:16.0d,Modifiers:[0:{UUIDMost:-8783172028836920024L,UUIDLeast:-6820414278857408689L,Amount:-0.030166473586416633d,Operation:1,Name:"Random spawn bonus"}],Name:"generic.followRange"}]
    -FallFlying: 0b
    -LeftHanded: 0b
    -ForcedAge: 0
    -AbsorptionAmount: 0.0f
    -HandItems: [0:{},1:{}]
    -ArmorDropChances: [0:0.085f,1:0.085f,2:0.085f,3:0.085f]
    -OwnerUUID: ""
    -InLove: 0
    -DeathTime: 0s
    -ArmorItems: [0:{},1:{},2:{},3:{}]
    -CanPickUpLoot: 0b
    -HandDropChances: [0:0.085f,1:0.085f]
    -PersistenceRequired: 0b
    -HurtTime: 0s
    -Age: 0

    Code (Text):
                    NBTTileEntity tent = new NBTTileEntity(b.getState());
                    tent.setString("Lock", "test");

    More Infos:

    This API can't be used for:
    • Adding custom tags to TileEntities/Entities Not true anymore, check the NBTInjector examples above
    Git: Github
    Maven Repo: CodeMC
    Jenkins: Jenkins
    Discord server for help: Discord
    Feel free to create forks for your need! (Send me a message on Spigot the Discord server if you want stuff to be added/need help)
    Yes you are allowed to integrate the API into your plugin(remember to shade)! (Send me a link to your project so I can check it out ;))

    Plugins/projects using the api I know of:
    - Crazy Enchantments (133.000+ downloads!)
    - Vouchers
    - Item Commands
    - Comparable Hoppers
    - Backpacks
    - NotTooExpensive
    - Logistics-API
    - PaperMoney
    - InteractiveBooks
    - BlockStackerX
    - Timolia

    If you like this Resource, donate me a Coffee :) Paypal.me
    Thank for the donations made by N3kas, MrDienns, MrAxe and evilLamer!
    emanon, ENCOM, ANDREI923 and 26 others like this.

Recent Updates

  1. 2.1.0
  2. The big 2.0.0 update!
  3. 1.14 update

Recent Reviews

  1. Tabbin
    Version: 2.1.0
    Amazing API, used countless times for many different projects and will continue to use in the future.
  2. EnityStaller
    Version: 2.0.0
    NBT API 2.0.0 make a entity invisible ? I see that when I add this plugins, all mob will be invisible :v hope you fix this
    1. tr7zw
      Author's Response
      Please join the Discord and tell me there about the Server version/plugins/etc. This shouldn't be able to happen.
  3. Ugleh
    Version: 2.0.0
    Thanks for the API. Was attempting to make my latest plugin support 1.8-1.14 and found with this API. Would be interesting if there was a way to mute the NBT message in console.
  4. Ang_Drew
    Version: 2.0.0
    nbt feels easier for me and also i don't have to think about the version reflection anymore ^^ thanks a lot! really helps me out
  5. Afterburner0128
    Version: 2.0.0
    Excellent plugin, makes everything a million times easier, and the author is super helpful! Use it on almost all of my plugins
  6. CarrlosM
    Version: 1.8.3
    This is a great resource. It makes dealing with NBT tags 1000x easier and has drastically improved both the quality and readability of my code.
  7. yangyang200
    Version: 1.8.2
    Wow, sometimes dealing with NMS codes to add NBTs are really annoying. This API has at least freed up 2 hours of time! Excellent, great, nice, neat 10/10
  8. DrOreo002
    Version: 1.8.2
    Cool plugin, thank you so much for this man!. Appreciate it :D

    10/10 Would rate this again
  9. ilya50
    Version: 1.8.2
    Thanks for this excellent API. It saved me more than an hour of time.I wish I knew about him a little earlier ....
  10. Coltify
    Version: 1.8.2
    Outstanding work I have been using this API for some time now I am really happy with it being simple to use but also having access to other useful methods like the MojangsonParser#Parse_Nbt method.

    Overall this is amazing piece of work, keep it up!