Table of Contents

Key	Name
Type	vec2f
Type	vec3f
Type	vec4f
Type	vec3f64
Type	vec3i
Type	SlotComponentType
Type	SlotComponent
Type	ItemSoundEvent
Type	ItemFireworkExplosion
Type	ItemEffectDetail
Type	ItemPotionEffect
Type	ItemBlockProperty
Type	ExactComponentMatcher
Type	DataComponentMatchers
Type	ItemBlockPredicate
Type	ItemBookPage
Type	ItemWrittenBookPage
Type	ItemConsumeEffect
Type	ArmorTrimMaterial
Type	ArmorTrimPattern
Type	InstrumentData
Type	JukeboxSongData
Type	BannerPattern
Type	BannerPatternLayer
Type	UntrustedSlotComponent
Type	UntrustedSlot
Type	Slot
Type	HashedSlot
Type	Particle
Type	ingredient
Type	soundSource
Type	packedChunkPos
Type	previousMessages
Type	entityMetadataEntry
Type	EntityMetadataPaintingVariant
Type	tags
Type	chunkBlockEntity
Type	chat_session?
Type	game_profile
Type	command_node
Type	packet_common_settings
Type	packet_common_cookie_request
Type	packet_common_store_cookie
Type	packet_common_transfer
Type	packet_common_cookie_response
Type	packet_common_select_known_packs
Type	packet_common_custom_report_details
Type	packet_common_remove_resource_pack
Type	packet_common_add_resource_pack
Type	ServerLinkType
Type	packet_common_server_links

---

Field Name	Field Type	Notes
x	f32
y	f32

---

Field Name	Field Type	Notes
x	f32
y	f32
z	f32

---

Field Name	Field Type	Notes
x	f32
y	f32
z	f32
w	f32

---

Field Name	Field Type	Notes
x	f64
y	f64
z	f64

---

Field Name	Field Type	Notes
x	varint
y	varint
z	varint

---

Field Name	Field Type	Notes
SlotComponentType	varint enum 0 custom data 1 max stack size 2 max damage 3 damage 4 unbreakable 5 custom name 6 item name 7 item model 8 lore 9 rarity 10 enchantments 11 can place on 12 can break 13 attribute modifiers 14 custom model data 15 tooltip display 16 repair cost 17 creative slot lock 18 enchantment glint override 19 intangible projectile 20 food 21 consumable 22 use remainder 23 use cooldown 24 damage resistant 25 tool 26 weapon 27 enchantable 28 equippable 29 repairable 30 glider 31 tooltip style 32 death protection 33 blocks attacks 34 stored enchantments 35 dyed color 36 map color 37 map id 38 map decorations 39 map post processing 40 potion duration scale 41 charged projectiles 42 bundle contents 43 potion contents 44 suspicious stew effects 45 writable book content 46 written book content 47 trim 48 debug stick state 49 entity data 50 bucket entity data 51 block entity data 52 instrument 53 provides trim material 54 ominous bottle amplifier 55 jukebox playable 56 provides banner patterns 57 recipes 58 lodestone tracker 59 firework explosion 60 fireworks 61 profile 62 note block sound 63 banner patterns 64 base color 65 pot decorations 66 container 67 block state 68 bees 69 lock 70 container loot 71 break sound 72 villager/variant 73 wolf/variant 74 wolf/sound variant 75 wolf/collar 76 fox/variant 77 salmon/size 78 parrot/variant 79 tropical fish/pattern 80 tropical fish/base color 81 tropical fish/pattern color 82 mooshroom/variant 83 rabbit/variant 84 pig/variant 85 cow/variant 86 chicken/variant 87 frog/variant 88 horse/variant 89 painting/variant 90 llama/variant 91 axolotl/variant 92 cat/variant 93 cat/collar 94 sheep/color 95 shulker/color

---

Instead of sending NBT for items over the network, Minecraft since 1.20.5 sends a list of components that make up the item. This saves bandwidth by not encoding tag names.

Field Name	Field Type	Notes
type	SlotComponentType
data if type	is custom data anonymousNbt is max stack size varint is max damage varint is damage varint is unbreakable void is custom name anonymousNbt is item name anonymousNbt is item model string is lore length varint is lore array anonOptionalNbt is rarity varint enum 0 common 1 uncommon 2 rare 3 epic is enchantments enchantments length varint enchantments array id varint level varint is can place on or can break predicates length varint predicates array ItemBlockPredicate is attribute modifiers attributes length varint attributes array typeId varint name string value f64 operation varint enum 0 add 1 multiply base 2 multiply total slot varint enum 0 any 1 main hand 2 off hand 3 hand 4 feet 5 legs 6 chest 7 head 8 armor 9 body 10 saddle showTooltip bool is custom model data floats length varint floats array f32 flags length varint flags array bool strings length varint strings array string colors length varint colors array i32 is tooltip display hideTooltip bool hiddenComponents length varint hiddenComponents array varint is repair cost varint is creative slot lock void is enchantment glint override bool is intangible projectile void is blocks attacks blockDelaySeconds f32 disableCooldownScale f32 damageReductions length varint damageReductions array horizontalBlockingAngle f32 type optional IDSet base f32 factor f32 itemDamage threshold f32 base f32 factor f32 bypassedBy optional string blockSound optional ItemSoundHolder disableSound optional ItemSoundHolder is food nutrition varint saturationModifier f32 How much saturation will be given after consuming the item. canAlwaysEat bool Whether the item can always be eaten, even at full hunger. is consumable consume seconds f32 animation varint enum 0 none 1 eat 2 drink 3 block 4 bow 5 spear 6 crossbow 7 spyglass 8 toot horn 9 brush 10 bundle sound ItemSoundHolder makes particles bool effects length varint effects array ItemConsumeEffect is use remainder Slot is use cooldown seconds f32 cooldownGroup optional string is damage resistant string is tool rules length varint rules array blocks IDSet speed optional f32 The speed at which the tool breaks this rules' blocks. correctDropForBlocks optional bool Whether items should drop only if this is the correct tool. defaultMiningSpeed f32 The mining speed in case none of the previous rule were matched. damagePerBlock varint canDestroyBlocksInCreative bool is weapon itemDamagePerAttack varint disableBlockingForSeconds f32 is enchantable varint Enchantment cost up to which the item can be enchanted is equippable slot varint enum 0 main hand 1 off hand 2 feet 3 legs 4 chest 5 head 6 body 7 saddle sound ItemSoundHolder model optional string cameraOverlay optional string allowedEntities optional IDSet dispensable bool swappable bool damageable bool equipOnInteract bool is repairable items IDSet is glider void is tooltip style string is death protection effects length varint effects array ItemConsumeEffect is stored enchantments enchantments length varint enchantments array id varint The ID of the enchantment in the enchantment registry. level varint is dyed color i32 is map color i32 is map id varint is map decorations anonymousNbt is map post processing varint is potion duration scale f32 is charged projectiles projectiles length varint projectiles array Slot is bundle contents contents length varint contents array Slot is potion contents potionId optional varint True if this potion has an ID in the potion registry--it has the default effects associated with the potion type. customColor optional i32 The RGB components of the color, encoded as an integer. customEffects length varint customEffects array ItemPotionEffect customName optional string is suspicious stew effects effects length varint effects array effect varint The ID of the effect in the potion effect type registry. duration varint The duration of the effect. is writable book content pages length varint Max 100 pages pages array ItemBookPage is written book content rawTitle string filteredTitle optional string author string generation varint pages length varint pages array ItemWrittenBookPage resolved bool is trim is debug stick state anonymousNbt is entity data anonymousNbt is bucket entity data anonymousNbt is block entity data anonymousNbt is provides trim material hasHolder bool material if hasHolder is false string is ominous bottle amplifier varint is jukebox playable hasHolder bool song if hasHolder is false string is provides banner patterns string is recipes anonymousNbt is lodestone tracker globalPosition optional dimension string Specified if this lodestone points to a position; otherwise it spins randomly. position position The position the compass points to. Only present if Has Global Position is true. tracked bool Whether the component is removed when the associated lodestone is broken. is firework explosion ItemFireworkExplosion is fireworks flightDuration varint explosions length varint explosions array ItemFireworkExplosion is profile name optional string If the profile has a name, max 16 characters. uuid optional UUID properties length varint properties array name string Max 64 characters value string signature optional string Max 1024 characters is note block sound string is banner patterns layers length varint layers array BannerPatternLayer is base color varint is pot decorations decorations length varint The ID of the items in the item registry. decorations array varint is container contents length varint contents array Slot is block state properties length varint properties array name string value string is bees bees length varint bees array nbtData anonymousNbt Custom data for the entity, always a Compound Tag. Same structure as the minecraft:custom_data component. ticksInHive varint minTicksInHive varint is lock anonymousNbt is container loot anonymousNbt is break sound ItemSoundHolder is villager/variant varint is wolf/variant varint is wolf/sound variant varint is wolf/collar varint is fox/variant varint is salmon/size varint is parrot/variant varint is tropical fish/pattern varint is tropical fish/base color varint is tropical fish/pattern color varint is mooshroom/variant varint is rabbit/variant varint is pig/variant varint is cow/variant varint is frog/variant varint is horse/variant varint is llama/variant varint is axolotl/variant varint is cat/variant varint is cat/collar varint is sheep/color varint is shulker/color varint

---

Field Name	Field Type	Notes
soundName	string
fixedRange optional	f32

---

Field Name	Field Type	Notes
shape	varint enum 0 small ball 1 large ball 2 star 3 creeper 4 burst
colors length	varint	The RGB components of the color, encoded as an integer.
colors array	i32
fadeColors length	varint	The RGB components of the color, encoded as an integer.
fadeColors array	i32
hasTrail	bool	Whether the firework has a trail.
hasTwinkle	bool	Whether the firework has a twinkle effect.

---

Field Name	Field Type	Notes
amplifier	varint
duration	varint
ambient	bool
showParticles	bool
showIcon	bool
hiddenEffect optional	ItemEffectDetail

---

Field Name	Field Type	Notes
id	varint
details	ItemEffectDetail

---

Field Name	Field Type	Notes
name	string
isExactMatch	bool
value if isExactMatch	is true exactValue string is false minValue string maxValue string

---

Field Name	Field Type	Notes
exactMatchers	ExactComponentMatcher
partialMatchers length	varint
partialMatchers array	varint

---

Field Name	Field Type	Notes
properties length	varint
properties array	ItemBlockProperty
nbt	anonOptionalNbt
components	DataComponentMatchers

---

Field Name	Field Type	Notes
content	string	The raw text of the page. TextComponent, max 1024 characters.
filteredContent optional	string

---

Field Name	Field Type	Notes
content	anonymousNbt
filteredContent	anonOptionalNbt

---

Field Name	Field Type	Notes
type	varint enum 0 apply effects 1 remove effects 2 clear all effects 3 teleport randomly 4 play sound
🔁 if type	is apply effects effects length varint effects array ItemPotionEffect probability f32 is remove effects effects IDSet is clear all effects void is teleport randomly diameter f32 is play sound sound ItemSoundHolder

---

Field Name	Field Type	Notes
assetBase	string
overrideArmorAssets length	varint
overrideArmorAssets array	key string value string
description	anonymousNbt

---

Field Name	Field Type	Notes
assetId	string
description	anonymousNbt
decal	bool

---

Field Name	Field Type	Notes
soundEvent	ItemSoundHolder
useDuration	f32
range	f32
description	anonymousNbt

---

Field Name	Field Type	Notes
soundEvent	ItemSoundHolder
description	anonymousNbt
lengthInSeconds	f32
comparatorOutput	varint

---

Field Name	Field Type	Notes
assetId	string
translationKey	string

---

Field Name	Field Type	Notes
colorId	varint

---

This represents a single component within an UntrustedSlot. The 'data' field is a varint-prefixed byte array that contains the actual component data. The code generator will need to know that it should read a varint for length, then the bytes.

Field Name	Field Type	Notes
type	SlotComponentType
data	ByteArray

---

An UntrustedSlot is structurally identical to a regular Slot, but it uses the special UntrustedSlotComponent type for its component list. It's optional because the player might be clearing the slot.

Field Name	Field Type	Notes
itemCount	varint
🔁 if itemCount	is 0 void default itemId varint addedComponentCount varint removedComponentCount varint Length for components below is addedComponentCount from above components array UntrustedSlotComponent Length for removeComponents below is removedComponentCount from above removeComponents array type SlotComponentType is false void

---

Field Name	Field Type	Notes
itemCount	varint
🔁 if itemCount	is 0 void default itemId varint addedComponentCount varint https://wiki.vg/SlotData#Structuredcomponents removedComponentCount varint Length for components below is addedComponentCount from above components array SlotComponent Length for removeComponents below is removedComponentCount from above removeComponents array type SlotComponentType

---

Field Name	Field Type	Notes
itemId	varint
itemCount	varint
components length	varint
components array	type SlotComponentType hash i32
removeComponents length	varint
removeComponents array	type SlotComponentType

---

Field Name	Field Type	Notes
type	varint enum 0 angry villager See client/net/minecraft/core/particles/ParticleTypes.java 1 block 2 block marker 3 bubble 4 cloud 5 crit 6 damage indicator 7 dragon breath 8 dripping lava 9 falling lava 10 landing lava 11 dripping water 12 falling water 13 dust 14 dust color transition 15 effect 16 elder guardian 17 enchanted hit 18 enchant 19 end rod 20 entity effect 21 explosion emitter 22 explosion 23 gust 24 small gust 25 gust emitter large 26 gust emitter small 27 sonic boom 28 falling dust 29 firework 30 fishing 31 flame 32 infested 33 cherry leaves 34 pale oak leaves 35 tinted leaves 36 sculk soul 37 sculk charge 38 sculk charge pop 39 soul fire flame 40 soul 41 flash 42 happy villager 43 composter 44 heart 45 instant effect 46 item 47 vibration 48 trail 49 item slime 50 item cobweb 51 item snowball 52 large smoke 53 lava 54 mycelium 55 note 56 poof 57 portal 58 rain 59 smoke 60 white smoke 61 sneeze 62 spit 63 squid ink 64 sweep attack 65 totem of undying 66 underwater 67 splash 68 witch 69 bubble pop 70 current down 71 bubble column up 72 nautilus 73 dolphin 74 campfire cosy smoke 75 campfire signal smoke 76 dripping honey 77 falling honey 78 landing honey 79 falling nectar 80 falling spore blossom 81 ash 82 crimson spore 83 warped spore 84 spore blossom air 85 dripping obsidian tear 86 falling obsidian tear 87 landing obsidian tear 88 reverse portal 89 white ash 90 small flame 91 snowflake 92 dripping dripstone lava 93 falling dripstone lava 94 dripping dripstone water 95 falling dripstone water 96 glow squid ink 97 glow 98 wax on 99 wax off 100 electric spark 101 scrape 102 shriek 103 egg crack 104 dust plume 105 trial spawner detected player 106 trial spawner detected player ominous 107 vault connection 108 dust pillar 109 ominous spawning 110 raid omen 111 trial omen 112 block crumble 113 firefly
data if type	is block or block marker or falling dust or dust pillar or block crumble varint is dust red f32 green f32 blue f32 scale f32 is dust color transition fromRed f32 fromGreen f32 fromBlue f32 scale f32 toRed f32 toGreen f32 toBlue f32 is entity effect i32 is item Slot is sculk charge f32 is shriek varint is vibration positionType varint enum 0 block 1 entity position if positionType is block position is entity entityId varint entityEyeHeight f32 ticks varint is trail target vec3f64 color u8 is tinted leaves i32 is firefly void

---

Field Name	Field Type	Notes
soundSource	varint enum 0 master 1 music 2 record 3 weather 4 block 5 hostile 6 neutral 7 player 8 ambient 9 voice

---

Field Name	Field Type	Notes
z	i32
x	i32

---

Field Name	Field Type	Notes
previousMessages length	varint
previousMessages array	id varint signature if id default void

---

Field Name	Field Type	Notes
key	u8
type	varint enum 0 byte 1 int 2 long 3 float 4 string 5 component 6 optional component 7 item stack 8 boolean 9 rotations 10 block pos 11 optional block pos 12 direction 13 optional uuid 14 block state 15 optional block state 16 compound tag 17 particle 18 particles 19 villager data 20 optional unsigned int 21 pose 22 cat variant 23 cow variant 24 wolf variant 25 wolf sound variant 26 frog variant 27 pig variant 28 chicken variant 29 optional global pos 30 painting variant 31 sniffer state 32 armadillo state 33 vector3 34 quaternion
value if type	is byte i8 is int varint is long varlong is float f32 is string string is component anonymousNbt is item stack Slot is boolean bool is rotations pitch f32 yaw f32 roll f32 is block pos position is direction varint is block state varint is optional block state optvarint is compound tag anonymousNbt is particle Particle is particles length varint is particles array Particle is villager data villagerType varint villagerProfession varint level varint is optional unsigned int optvarint is pose varint is cat variant varint is cow variant varint is wolf variant varint is wolf sound variant varint is frog variant varint is pig variant varint is sniffer state varint is armadillo state varint is vector3 vec3f is quaternion vec4f

---

Field Name	Field Type	Notes
width	i32
height	i32
assetId	string
title optional	anonymousNbt
author optional	anonymousNbt

---

Field Name	Field Type	Notes
tags length	varint
tags array	tagName string entries length varint entries array varint

---

Field Name	Field Type	Notes
y	i16
type	varint
nbtData	anonOptionalNbt

---

Field Name	Field Type	Notes
uuid	UUID
publicKey	expireTime i64

---

Field Name	Field Type	Notes
name	string
properties length	varint
properties array	name string value string signature optional string

---

Field Name	Field Type	Notes
children length	varint
children array	varint
redirectNode if flags/has redirect node	is 1 varint default void
extraNodeData if flags/command node type	is 0 void is 1 name string is 2 name string parser varint enum 0 brigadier:bool 1 brigadier:float 2 brigadier:double 3 brigadier:integer 4 brigadier:long 5 brigadier:string 6 minecraft:entity 7 minecraft:game profile 8 minecraft:block pos 9 minecraft:column pos 10 minecraft:vec3 11 minecraft:vec2 12 minecraft:block state 13 minecraft:block predicate 14 minecraft:item stack 15 minecraft:item predicate 16 minecraft:color 17 minecraft:component 18 minecraft:style 19 minecraft:message 20 minecraft:nbt 21 minecraft:nbt tag 22 minecraft:nbt path 23 minecraft:objective 24 minecraft:objective criteria 25 minecraft:operation 26 minecraft:particle 27 minecraft:angle 28 minecraft:rotation 29 minecraft:scoreboard slot 30 minecraft:score holder 31 minecraft:swizzle 32 minecraft:team 33 minecraft:item slot 34 minecraft:item slots 35 minecraft:resource location 36 minecraft:function 37 minecraft:entity anchor 38 minecraft:int range 39 minecraft:float range 40 minecraft:dimension 41 minecraft:gamemode 42 minecraft:time 43 minecraft:resource or tag 44 minecraft:resource or tag key 45 minecraft:resource 46 minecraft:resource key 47 minecraft:resource selector 48 minecraft:template mirror 49 minecraft:template rotation 50 minecraft:heightmap 51 minecraft:loot table 52 minecraft:loot predicate 53 minecraft:loot modifier 54 minecraft:uuid properties if parser is brigadier:bool void is brigadier:float min if flags/min present is 1 f32 default void max if flags/max present is 1 f32 default void is brigadier:double min if flags/min present is 1 f64 default void max if flags/max present is 1 f64 default void is brigadier:integer min if flags/min present is 1 i32 default void max if flags/max present is 1 i32 default void is brigadier:long min if flags/min present is 1 i64 default void max if flags/max present is 1 i64 default void is brigadier:string varint enum 0 SINGLE WORD 1 QUOTABLE PHRASE 2 GREEDY PHRASE is minecraft:game profile void is minecraft:block pos void is minecraft:column pos void is minecraft:vec3 void is minecraft:vec2 void is minecraft:block state void is minecraft:block predicate void is minecraft:item stack void is minecraft:item predicate void is minecraft:color void is minecraft:component void is minecraft:message void is minecraft:nbt void is minecraft:nbt path void is minecraft:objective void is minecraft:objective criteria void is minecraft:operation void is minecraft:particle void is minecraft:angle void is minecraft:rotation void is minecraft:scoreboard slot void is minecraft:swizzle void is minecraft:team void is minecraft:item slot void is minecraft:resource location void is minecraft:function void is minecraft:entity anchor void is minecraft:int range void is minecraft:float range void is minecraft:dimension void is minecraft:gamemode void is minecraft:time min i32 is minecraft:resource or tag or minecraft:resource or tag key or minecraft:resource or minecraft:resource key or minecraft:resource selector registry string is minecraft:template mirror void is minecraft:template rotation void is minecraft:heightmap void is minecraft:uuid void suggestionType if ../flags/has custom suggestions is 1 string default void

---

Shared Packets

These are packets that are shared between multiple states. They are defined here to avoid duplication.

MC: ServerboundClientInformationPacket

Field Name	Field Type	Notes
locale	string
viewDistance	i8
chatFlags	varint
chatColors	bool
skinParts	u8
mainHand	varint
enableTextFiltering	bool
enableServerListing	bool
particleStatus	varint enum 0 all 1 decreased 2 minimal

---

MC: ClientboundCookieRequestPacket

Field Name	Field Type	Notes
cookie	string

---

MC: ClientboundStoreCookiePacket

Field Name	Field Type	Notes
key	string
value	ByteArray

---

MC: ClientboundTransferPacket

Field Name	Field Type	Notes
host	string
port	varint

---

MC: ServerboundCookieResponsePacket

Field Name	Field Type	Notes
key	string
value	ByteArray

---

MC: ServerboundSelectKnownPacks MC: ClientboundSelectKnownPacks

Field Name	Field Type	Notes
packs length	varint
packs array	namespace string id string version string

---

MC: ClientboundCustomReportDetailsPacket

Field Name	Field Type	Notes
details length	varint
details array	key string value string

---

MC: ClientboundResourcePackPopPacket

Field Name	Field Type	Notes
uuid optional	UUID

---

MC: ClientboundResourcePackPushPacket

Field Name	Field Type	Notes
uuid	UUID
url	string
hash	string
forced	bool
promptMessage optional	anonymousNbt

---

Field Name	Field Type	Notes
ServerLinkType	varint enum 0 bug report 1 community guidelines 2 support 3 status 4 feedback 5 community 6 website 7 forums 8 news 9 announcements

---

MC: ClientboundServerLinksPacket This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).

Field Name	Field Type	Notes
links length	varint
links array	hasKnownType bool knownType if hasKnownType is true ServerLinkType unknownType if hasKnownType is false anonymousNbt link string

---

Table of Contents

Key	Name
Type	packet

---

Field Name	Field Type	Notes
name	varint enum

---

Table of Contents

Key	Name
Type	packet_set_protocol
0xfe	packet_legacy_server_list_ping
Type	packet

---

Field Name	Field Type	Notes
protocolVersion	varint
serverHost	string
serverPort	u16
nextState	varint

---

Field Name	Field Type	Notes
payload	u8

---

Field Name	Field Type	Notes
name	varint enum 0 set protocol 254 legacy server list ping
params if name	is set protocol packet_set_protocol is legacy server list ping packet_legacy_server_list_ping

---

Table of Contents

Key	Name
Type	packet_server_info
0x1	packet_ping
Type	packet

---

MC: ClientboundStatusResponsePacket

Field Name	Field Type	Notes
response	string

---

MC: ClientboundPongResponsePacket

Field Name	Field Type	Notes
time	i64

---

Field Name	Field Type	Notes
name	varint enum 0 server info 1 ping
params if name	is server info packet_server_info is ping packet_ping

---

Table of Contents

Key	Name
Type	packet_ping_start
0x1	packet_ping
Type	packet

---

MC: ServerboundStatusRequestPacket

Field Name	Field Type	Notes

---

Empty MC: ServerboundPingRequestPacket

Field Name	Field Type	Notes
time	i64

---

Field Name	Field Type	Notes
name	varint enum 0 ping start 1 ping
params if name	is ping start packet_ping_start is ping packet_ping

---

Table of Contents

Key	Name
Type	packet_disconnect
0x1	packet_encryption_begin
0x2	packet_success
0x3	packet_compress
0x4	packet_login_plugin_request
Type	packet

---

MC: ClientboundLoginDisconnectPacket

Field Name	Field Type	Notes
reason	string

---

MC: ClientboundHelloPacket

Field Name	Field Type	Notes
serverId	string
shouldAuthenticate	bool

---

MC: ClientboundLoginFinishedPacket

Field Name	Field Type	Notes
uuid	UUID
username	string
properties length	varint
properties array	name string value string signature optional string

---

MC: ClientboundLoginCompressionPacket

Field Name	Field Type	Notes
threshold	varint

---

MC: ClientboundCustomQueryPacket

Field Name	Field Type	Notes
messageId	varint
channel	string
data	restBuffer

---

Field Name	Field Type	Notes
name	varint enum 0 disconnect 1 encryption begin 2 success 3 compress 4 login plugin request 5 cookie request
params if name	is disconnect packet_disconnect is encryption begin packet_encryption_begin is success packet_success is compress packet_compress is login plugin request packet_login_plugin_request is cookie request packet_common_cookie_request

---

Table of Contents

Key	Name
Type	packet_login_start
0x1	packet_encryption_begin
0x2	packet_login_plugin_response
0x3	packet_login_acknowledged
Type	packet

---

MC: ServerboundHelloPacket

Field Name	Field Type	Notes
username	string
playerUUID	UUID

---

MC: ServerboundKeyPacket

Field Name	Field Type	Notes

---

MC: ServerboundCustomQueryAnswerPacket

Field Name	Field Type	Notes
messageId	varint
data optional	restBuffer

---

MC: ServerboundLoginAcknowledgedPacket

Field Name	Field Type	Notes

---

Empty

Field Name	Field Type	Notes
name	varint enum 0 login start 1 encryption begin 2 login plugin response 3 login acknowledged 4 cookie response
params if name	is login start packet_login_start is encryption begin packet_encryption_begin is login plugin response packet_login_plugin_response is login acknowledged packet_login_acknowledged is cookie response packet_common_cookie_response

---

Table of Contents

Key	Name
0x1	packet_custom_payload
0x2	packet_disconnect
0x3	packet_finish_configuration
0x4	packet_keep_alive
0x5	packet_ping
0x6	packet_reset_chat
0x7	packet_registry_data
0xc	packet_feature_flags
0xd	packet_tags
Type	packet

---

MC: ClientboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

---

MC: ClientboundDisconnectPacket

Field Name	Field Type	Notes
reason	anonymousNbt

---

MC: ClientboundFinishConfigurationPacket

Field Name	Field Type	Notes

---

Empty MC: ClientboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

---

MC: ClientboundPingPacket

Field Name	Field Type	Notes
id	i32

---

MC: ClientboundResetChatPacket

Field Name	Field Type	Notes

---

Empty MC: ClientboundRegistryDataPacket

Field Name	Field Type	Notes
id	string	The server can send multiple registries
entries length	varint
entries array	key string value optional anonymousNbt

---

MC: ClientboundUpdateEnabledFeaturesPacket

Field Name	Field Type	Notes
features length	varint
features array	string

---

MC: ClientboundUpdateTagsPacket

Field Name	Field Type	Notes
tags length	varint
tags array	tagType string tags tags

---

Field Name	Field Type	Notes
name	varint enum 0 cookie request 1 custom payload 2 disconnect 3 finish configuration 4 keep alive 5 ping 6 reset chat 7 registry data 8 remove resource pack 9 add resource pack 10 store cookie 11 transfer 12 feature flags 13 tags 14 select known packs 15 custom report details 16 server links
params if name	is cookie request packet_common_cookie_request is custom payload packet_custom_payload is disconnect packet_disconnect is finish configuration packet_finish_configuration is keep alive packet_keep_alive is ping packet_ping is reset chat packet_reset_chat is registry data packet_registry_data is remove resource pack packet_common_remove_resource_pack is add resource pack packet_common_add_resource_pack is store cookie packet_common_store_cookie is transfer packet_common_transfer is feature flags packet_feature_flags is tags packet_tags is select known packs packet_common_select_known_packs is custom report details packet_common_custom_report_details is server links packet_common_server_links

---

Table of Contents

Key	Name
0x2	packet_custom_payload
0x3	packet_finish_configuration
0x4	packet_keep_alive
0x5	packet_pong
0x6	packet_resource_pack_receive
Type	packet

---

MC: ServerboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

---

MC: ServerboundFinishConfigurationPacket

Field Name	Field Type	Notes

---

Empty MC: ServerboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

---

MC: ServerboundPongPacket

Field Name	Field Type	Notes
id	i32

---

MC: ServerboundResourcePackPacket

Field Name	Field Type	Notes
uuid	UUID
result	varint

---

Field Name	Field Type	Notes
name	varint enum 0 settings 1 cookie response 2 custom payload 3 finish configuration 4 keep alive 5 pong 6 resource pack receive 7 select known packs 8 custom report details 9 server links
params if name	is settings packet_common_settings is cookie response packet_common_cookie_response is custom payload packet_custom_payload is finish configuration packet_finish_configuration is keep alive packet_keep_alive is pong packet_pong is resource pack receive packet_resource_pack_receive is select known packs packet_common_select_known_packs is custom report details packet_common_custom_report_details is server links packet_common_server_links

---

Table of Contents

Key	Name
Type	SlotDisplay
Type	RecipeDisplay
Type	SpawnInfo
0x1	packet_spawn_entity
0x2	packet_animation
0x3	packet_statistics
0x4	packet_acknowledge_player_digging
0x5	packet_block_break_animation
0x6	packet_tile_entity_data
0x7	packet_block_action
0x8	packet_block_change
0x9	packet_boss_bar
0xa	packet_difficulty
0xb	packet_chunk_batch_finished
0xc	packet_chunk_batch_start
0xd	packet_chunk_biomes
0xe	packet_clear_titles
0xf	packet_tab_complete
0x10	packet_declare_commands
0x11	packet_close_window
0x12	packet_window_items
0x13	packet_craft_progress_bar
0x14	packet_set_slot
0x16	packet_set_cooldown
0x17	packet_chat_suggestions
0x18	packet_custom_payload
0x19	packet_damage_event
0x1a	packet_debug_sample
0x1b	packet_hide_message
0x1c	packet_kick_disconnect
Type	ChatTypeParameterType
Type	ChatType
Type	ChatTypes
0x1d	packet_profileless_chat
0x1e	packet_entity_status
0x1f	packet_sync_entity_position
0x20	packet_explosion
0x21	packet_unload_chunk
0x22	packet_game_state_change
0x23	packet_open_horse_window
0x24	packet_hurt_animation
0x25	packet_initialize_world_border
0x26	packet_keep_alive
0x27	packet_map_chunk
0x28	packet_world_event
0x29	packet_world_particles
0x2a	packet_update_light
0x2b	packet_login
0x2c	packet_map
0x2d	packet_trade_list
0x2e	packet_rel_entity_move
0x2f	packet_entity_move_look
0x30	packet_move_minecart
0x31	packet_entity_look
0x32	packet_vehicle_move
0x33	packet_open_book
0x34	packet_open_window
0x35	packet_open_sign_entity
0x36	packet_ping
0x37	packet_ping_response
0x38	packet_craft_recipe_response
0x39	packet_abilities
0x3a	packet_player_chat
0x3b	packet_end_combat_event
0x3c	packet_enter_combat_event
0x3d	packet_death_combat_event
0x3e	packet_player_remove
0x3f	packet_player_info
0x40	packet_face_player
0x41	packet_position
0x42	packet_player_rotation
0x43	packet_recipe_book_add
0x44	packet_recipe_book_remove
0x45	packet_recipe_book_settings
0x46	packet_entity_destroy
0x47	packet_remove_entity_effect
0x48	packet_reset_score
0x4b	packet_respawn
0x4c	packet_entity_head_rotation
0x4d	packet_multi_block_change
0x4e	packet_select_advancement_tab
0x4f	packet_server_data
0x50	packet_action_bar
0x51	packet_world_border_center
0x52	packet_world_border_lerp_size
0x53	packet_world_border_size
0x54	packet_world_border_warning_delay
0x55	packet_world_border_warning_reach
0x56	packet_camera
0x57	packet_update_view_position
0x58	packet_update_view_distance
0x59	packet_set_cursor_item
0x5a	packet_spawn_position
0x5b	packet_scoreboard_display_objective
0x5c	packet_entity_metadata
0x5d	packet_attach_entity
0x5e	packet_entity_velocity
0x5f	packet_entity_equipment
0x60	packet_experience
0x61	packet_update_health
0x62	packet_held_item_slot
0x63	packet_scoreboard_objective
0x64	packet_set_passengers
0x65	packet_set_player_inventory
0x66	packet_teams
0x67	packet_scoreboard_score
0x68	packet_simulation_distance
0x69	packet_set_title_subtitle
0x6a	packet_update_time
0x6b	packet_set_title_text
0x6c	packet_set_title_time
0x6d	packet_entity_sound_effect
0x6e	packet_sound_effect
0x6f	packet_start_configuration
0x70	packet_stop_sound
0x72	packet_system_chat
0x73	packet_playerlist_header
0x74	packet_nbt_query_response
0x75	packet_collect
0x76	packet_entity_teleport
0x77	packet_test_instance_block_status
0x78	packet_set_ticking_state
0x79	packet_step_tick
0x7b	packet_advancements
0x7c	packet_entity_update_attributes
0x7d	packet_entity_effect
0x7e	packet_declare_recipes
0x7f	packet_tags
0x80	packet_set_projectile_power
Type	packet

---

Field Name	Field Type	Notes
type	varint enum 0 empty 1 any fuel 2 item 3 item stack 4 tag 5 smithing trim 6 with remainder 7 composite
data if type	is empty or any fuel void is item varint is item stack Slot is tag string is smithing trim base SlotDisplay material SlotDisplay is with remainder input SlotDisplay remainder SlotDisplay is composite length varint is composite array SlotDisplay

---

Field Name	Field Type	Notes
type	varint enum 0 crafting shapeless 1 crafting shaped 2 furnace 3 stonecutter 4 smithing
data if type	is crafting shapeless ingredients length varint ingredients array SlotDisplay result SlotDisplay craftingStation SlotDisplay is crafting shaped width varint height varint ingredients length varint ingredients array SlotDisplay result SlotDisplay craftingStation SlotDisplay is furnace ingredient SlotDisplay fuel SlotDisplay result SlotDisplay craftingStation SlotDisplay duration varint experience f32 is stonecutter ingredient SlotDisplay result SlotDisplay craftingStation SlotDisplay is smithing template SlotDisplay base SlotDisplay addition SlotDisplay result SlotDisplay craftingStation SlotDisplay

---

World state information for spawn and respawn packets

Field Name	Field Type	Notes
dimension	varint
name	string
hashedSeed	i64
gamemode	i8 enum 0 survival 1 creative 2 adventure 3 spectator
previousGamemode	u8
isDebug	bool
isFlat	bool
death optional	dimensionName string location position
portalCooldown	varint
seaLevel	varint

---

MC: ClientboundAddEntityPacket

Field Name	Field Type	Notes
entityId	varint
objectUUID	UUID
type	varint
x	f64
y	f64
z	f64
pitch	i8
yaw	i8
headPitch	i8
objectData	varint
velocityX	i16
velocityY	i16
velocityZ	i16

---

MC: ClientboundAnimatePacket

Field Name	Field Type	Notes
entityId	varint
animation	u8

---

MC: ClientboundAwardStatsPacket

Field Name	Field Type	Notes
entries length	varint
entries array	categoryId varint statisticId varint value varint

---

MC: ClientboundBlockChangedAckPacket

Field Name	Field Type	Notes
sequenceId	varint

---

MC: ClientboundBlockDestructionPacket

Field Name	Field Type	Notes
entityId	varint
location	position
destroyStage	i8

---

MC: ClientboundBlockEntityDataPacket

Field Name	Field Type	Notes
location	position
action	varint
nbtData	anonOptionalNbt

---

MC: ClientboundBlockEventPacket

Field Name	Field Type	Notes
location	position
byte1	u8
byte2	u8
blockId	varint

---

MC: ClientboundBlockUpdatePacket

Field Name	Field Type	Notes
location	position
type	varint

---

MC: ClientboundBossEventPacket

Field Name	Field Type	Notes
entityUUID	UUID
action	varint
title if action	is 0 anonymousNbt is 3 anonymousNbt default void
health if action	is 0 f32 is 2 f32 default void
color if action	is 0 varint is 4 varint default void
dividers if action	is 0 varint is 4 varint default void
flags if action	is 0 u8 is 5 u8 default void

---

MC: ClientboundChangeDifficultyPacket

Field Name	Field Type	Notes
difficulty	u8
difficultyLocked	bool

---

MC: ClientboundChunkBatchFinishedPacket

Field Name	Field Type	Notes
batchSize	varint

---

MC: ClientboundChunkBatchStartPacket

Field Name	Field Type	Notes

---

Empty MC: ClientboundChunksBiomesPacket

Field Name	Field Type	Notes
biomes length	varint
biomes array	position packedChunkPos data ByteArray

---

MC: ClientboundClearTitlesPacket

Field Name	Field Type	Notes
reset	bool

---

MC: ClientboundCommandSuggestionsPacket

Field Name	Field Type	Notes
transactionId	varint
start	varint
length	varint
matches length	varint
matches array	match string tooltip optional anonymousNbt

---

MC: ClientboundCommandsPacket

Field Name	Field Type	Notes
nodes length	varint
nodes array	command_node
rootIndex	varint

---

MC: ClientboundContainerClosePacket

Field Name	Field Type	Notes
windowId	ContainerID

---

MC: ClientboundContainerSetContentPacket

Field Name	Field Type	Notes
windowId	ContainerID
stateId	varint
items length	varint
items array	Slot
carriedItem	Slot

---

MC: ClientboundContainerSetDataPacket

Field Name	Field Type	Notes
windowId	ContainerID
property	i16
value	i16

---

MC: ClientboundContainerSetSlotPacket

Field Name	Field Type	Notes
windowId	ContainerID
stateId	varint
slot	i16
item	Slot

---

MC: ClientboundCooldownPacket

Field Name	Field Type	Notes
cooldownGroup	string	TODO: figure out what this is
cooldownTicks	varint

---

MC: ClientboundCustomChatCompletionsPacket

Field Name	Field Type	Notes
action	varint
entries length	varint
entries array	string

---

MC: ClientboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

---

MC: ClientboundDamageEventPacket

Field Name	Field Type	Notes
entityId	varint
sourceTypeId	varint
sourceCauseId	varint
sourceDirectId	varint
sourcePosition optional	vec3f64

---

MC: ClientboundDebugSamplePacket

Field Name	Field Type	Notes
sample length	varint
sample array	i64
type	varint

---

MC: ClientboundDeleteChatPacket

Field Name	Field Type	Notes
id	varint
signature if id	default void

---

MC: ClientboundDisconnectPacket

Field Name	Field Type	Notes
reason	anonymousNbt

---

Field Name	Field Type	Notes
ChatTypeParameterType	varint enum 0 content 1 sender 2 target

---

Field Name	Field Type	Notes
translationKey	string
parameters length	varint
parameters array	ChatTypeParameterType
style	anonymousNbt

---

Field Name	Field Type	Notes
chat	ChatType
narration	ChatType

---

MC: ClientboundDisguisedChatPacket

Field Name	Field Type	Notes
message	anonymousNbt
type	ChatTypesHolder
name	anonymousNbt
target optional	anonymousNbt

---

MC: ClientboundEntityEventPacket

Field Name	Field Type	Notes
entityId	i32
entityStatus	i8

---

MC: ClientboundEntityPositionSyncPacket

Field Name	Field Type	Notes
entityId	varint
x	f64
y	f64
z	f64
dx	f64
dy	f64
dz	f64
yaw	f32
pitch	f32
onGround	bool

---

MC: ClientboundExplodePacket

Field Name	Field Type	Notes
x	f64
y	f64
z	f64
playerKnockback optional	vec3f
explosionParticle	Particle
sound	ItemSoundHolder

---

MC: ClientboundForgetLevelChunkPacket

Field Name	Field Type	Notes
chunkZ	i32
chunkX	i32

---

MC: ClientboundGameEventPacket

Field Name	Field Type	Notes
reason	u8
gameMode	f32

---

MC: ClientboundHorseScreenOpenPacket

Field Name	Field Type	Notes
windowId	ContainerID
nbSlots	varint
entityId	i32

---

MC: ClientboundHurtAnimationPacket

Field Name	Field Type	Notes
entityId	varint
yaw	f32

---

MC: ClientboundInitializeBorderPacket

Field Name	Field Type	Notes
x	f64
z	f64
oldDiameter	f64
newDiameter	f64
speed	varint
portalTeleportBoundary	varint
warningBlocks	varint
warningTime	varint

---

MC: ClientboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

---

MC: ClientboundLevelChunkWithLightPacket

Field Name	Field Type	Notes
x	i32
z	i32
heightmaps length	varint
heightmaps array	type varint data length varint data array i64
chunkData	ByteArray
blockEntities length	varint
blockEntities array	chunkBlockEntity
skyLightMask length	varint
skyLightMask array	i64
blockLightMask length	varint
blockLightMask array	i64
emptySkyLightMask length	varint
emptySkyLightMask array	i64
emptyBlockLightMask length	varint
emptyBlockLightMask array	i64
skyLight length	varint
skyLight array	__1894 length varint __1894 array u8
blockLight length	varint
blockLight array	__1896 length varint __1896 array u8

---

MC: ClientboundLevelEventPacket

Field Name	Field Type	Notes
effectId	i32
location	position
data	i32
global	bool

---

MC: ClientboundLevelParticlesPacket

Field Name	Field Type	Notes
longDistance	bool
alwaysShow	bool
x	f64
y	f64
z	f64
offsetX	f32
offsetY	f32
offsetZ	f32
velocityOffset	f32
amount	i32
particle	Particle

---

MC: ClientboundLightUpdatePacket

Field Name	Field Type	Notes
chunkX	varint
chunkZ	varint
skyLightMask length	varint
skyLightMask array	i64
blockLightMask length	varint
blockLightMask array	i64
emptySkyLightMask length	varint
emptySkyLightMask array	i64
emptyBlockLightMask length	varint
emptyBlockLightMask array	i64
skyLight length	varint
skyLight array	__1925 length varint __1925 array u8
blockLight length	varint
blockLight array	__1927 length varint __1927 array u8

---

MC: ClientboundLoginPacket

Field Name	Field Type	Notes
entityId	i32
isHardcore	bool
worldNames length	varint
worldNames array	string
maxPlayers	varint
viewDistance	varint
simulationDistance	varint
reducedDebugInfo	bool
enableRespawnScreen	bool
doLimitedCrafting	bool
worldState	SpawnInfo
enforcesSecureChat	bool

---

MC: ClientboundMapItemDataPacket

Field Name	Field Type	Notes
itemDamage	varint
scale	i8
locked	bool
icons length	varint
icons array	type varint x i8 z i8 direction u8 displayName optional anonymousNbt
columns	u8
rows if columns	is 0 void default u8
x if columns	is 0 void default u8
y if columns	is 0 void default u8
data if columns	is 0 void

---

MC: ClientboundMerchantOffersPacket

Field Name	Field Type	Notes
windowId	ContainerID
trades length	varint
trades array	inputItem1 itemId varint itemCount varint components ExactComponentMatcher outputItem Slot inputItem2 optional itemId varint itemCount varint components ExactComponentMatcher tradeDisabled bool nbTradeUses i32 maximumNbTradeUses i32 xp i32 specialPrice i32 priceMultiplier f32 demand i32
villagerLevel	varint
experience	varint
isRegularVillager	bool
canRestock	bool

---

MC: ClientboundMoveEntityPacket.Pos

Field Name	Field Type	Notes
entityId	varint
dX	i16
dY	i16
dZ	i16
onGround	bool

---

MC: ClientboundMoveEntityPacket.PosRot

Field Name	Field Type	Notes
entityId	varint
dX	i16
dY	i16
dZ	i16
yaw	i8
pitch	i8
onGround	bool

---

MC: ClientboundMoveMinecartPacket

Field Name	Field Type	Notes
entityId	varint
steps length	varint
steps array	position vec3f movement vec3f yaw f32 pitch f32 weight f32

---

MC: ClientboundMoveEntityPacket.Rot

Field Name	Field Type	Notes
entityId	varint
yaw	i8
pitch	i8
onGround	bool

---

MC: ClientboundMoveVehiclePacket

Field Name	Field Type	Notes
x	f64
y	f64
z	f64
yaw	f32
pitch	f32

---

MC: ClientboundOpenBookPacket

Field Name	Field Type	Notes
hand	varint

---

MC: ClientboundOpenScreenPacket

Field Name	Field Type	Notes
windowId	varint
inventoryType	varint
windowTitle	anonymousNbt

---

MC: ClientboundOpenSignEditorPacket

Field Name	Field Type	Notes
location	position
isFrontText	bool

---

MC: ClientboundPingPacket

Field Name	Field Type	Notes
id	i32

---

MC: ClientboundPongResponsePacket

Field Name	Field Type	Notes
id	i64

---

MC: ClientboundPlaceGhostRecipePacket

Field Name	Field Type	Notes
windowId	ContainerID
recipeDisplay	RecipeDisplay

---

MC: ClientboundPlayerAbilitiesPacket

Field Name	Field Type	Notes
flags	i8
flyingSpeed	f32
walkingSpeed	f32

---

MC: ClientboundPlayerChatPacket

Field Name	Field Type	Notes
globalIndex	varint
senderUuid	UUID
index	varint
plainMessage	string
timestamp	i64
salt	i64
previousMessages	previousMessages
unsignedChatContent optional	anonymousNbt
filterType	varint
filterTypeMask if filterType	is 2 length varint is 2 array i64 default void
type	ChatTypesHolder
networkName	anonymousNbt
networkTargetName optional	anonymousNbt

---

MC: ClientboundPlayerCombatEndPacket

Field Name	Field Type	Notes
duration	varint

---

MC: ClientboundPlayerCombatEnterPacket

Field Name	Field Type	Notes

---

Empty MC: ClientboundPlayerCombatKillPacket

Field Name	Field Type	Notes
playerId	varint
message	anonymousNbt

---

MC: ClientboundPlayerInfoRemovePacket

Field Name	Field Type	Notes
players length	varint
players array	UUID

---

MC: ClientboundPlayerInfoUpdatePacket

Field Name	Field Type	Notes
data length	varint
data array	uuid UUID player if ../action/add player is true game_profile default void chatSession if ../action/initialize chat is true chat_session default void gamemode if ../action/update game mode is true varint default void listed if ../action/update listed is true varint default void latency if ../action/update latency is true varint default void displayName if ../action/update display name default void listPriority if ../action/update list order is true varint default void showHat if ../action/update hat is true bool default void

---

MC: ClientboundPlayerLookAtPacket

Field Name	Field Type	Notes
feet eyes	varint
x	f64
y	f64
z	f64
isEntity	bool
entityId if isEntity	is true varint default void
entity feet eyes if isEntity	is true varint default void

---

https://github.com/extremeheat/extractedminecraftdata/blob/client1.21.2/client/net/minecraft/world/entity/Relative.java#L82 MC: ClientboundPlayerPositionPacket

Field Name	Field Type	Notes
teleportId	varint
x	f64
y	f64
z	f64
dx	f64
dy	f64
dz	f64
yaw	f32
pitch	f32
flags	PositionUpdateRelatives

---

MC: ClientboundPlayerRotationPacket

Field Name	Field Type	Notes
yaw	f32
pitch	f32

---

MC: ClientboundRecipeBookAddPacket

Field Name	Field Type	Notes
entries length	varint
entries array	recipe displayId varint RecipeDisplayEntry display RecipeDisplay group optvarint category varint enum 0 crafting building blocks This ID corresponds to the "recipebookcategory" registry 1 crafting redstone 2 crafting equipment 3 crafting misc 4 furnace food 5 furnace blocks 6 furnace misc 7 blast furnace blocks 8 blast furnace misc 9 smoker food 10 stonecutter 11 smithing 12 campfire craftingRequirements length varint craftingRequirements array IDSet
replace	bool

---

MC: ClientboundRecipeBookRemovePacket

Field Name	Field Type	Notes
recipeIds length	varint
recipeIds array	varint

---

MC: ClientboundRecipeBookSettingsPacket

Field Name	Field Type	Notes
craftingGuiOpen	bool
craftingFilteringCraftable	bool
smeltingGuiOpen	bool
smeltingFilteringCraftable	bool
blastGuiOpen	bool
blastFilteringCraftable	bool
smokerGuiOpen	bool
smokerFilteringCraftable	bool

---

MC: ClientboundRemoveEntitiesPacket

Field Name	Field Type	Notes
entityIds length	varint
entityIds array	varint

---

MC: ClientboundRemoveMobEffectPacket

Field Name	Field Type	Notes
entityId	varint
effectId	varint

---

MC: ClientboundResetScorePacket

Field Name	Field Type	Notes
entity name	string
objective name optional	string

---

MC: ClientboundRespawnPacket

Field Name	Field Type	Notes
worldState	SpawnInfo
copyMetadata	u8	Bit field: 0b1 - KEEPATTRIBUTEMODIFIERS, 0b10 - KEEPENTITYDATA

---

MC: ClientboundRotateHeadPacket

Field Name	Field Type	Notes
entityId	varint
headYaw	i8

---

MC: ClientboundSectionBlocksUpdatePacket

Field Name	Field Type	Notes
records length	varint
records array	varint

---

MC: ClientboundSelectAdvancementsTabPacket

Field Name	Field Type	Notes
id optional	string

---

MC: ClientboundServerDataPacket

Field Name	Field Type	Notes
motd	anonymousNbt
iconBytes optional	ByteArray

---

MC: ClientboundSetActionBarTextPacket

Field Name	Field Type	Notes
text	anonymousNbt

---

MC: ClientboundSetBorderCenterPacket

Field Name	Field Type	Notes
x	f64
z	f64

---

MC: ClientboundSetBorderLerpSizePacket

Field Name	Field Type	Notes
oldDiameter	f64
newDiameter	f64
speed	varint

---

MC: ClientboundSetBorderSizePacket

Field Name	Field Type	Notes
diameter	f64

---

MC: ClientboundSetBorderWarningDelayPacket

Field Name	Field Type	Notes
warningTime	varint

---

MC: ClientboundSetBorderWarningDistancePacket

Field Name	Field Type	Notes
warningBlocks	varint

---

MC: ClientboundSetCameraPacket

Field Name	Field Type	Notes
cameraId	varint

---

MC: ClientboundSetChunkCacheCenterPacket

Field Name	Field Type	Notes
chunkX	varint
chunkZ	varint

---

MC: ClientboundSetChunkCacheRadiusPacket

Field Name	Field Type	Notes
viewDistance	varint

---

MC: ClientboundSetCursorItemPacket

Field Name	Field Type	Notes
contents	Slot

---

MC: ClientboundSetDefaultSpawnPositionPacket

Field Name	Field Type	Notes
location	position
angle	f32

---

MC: ClientboundSetDisplayObjectivePacket

Field Name	Field Type	Notes
position	varint
name	string

---

MC: ClientboundSetEntityDataPacket

Field Name	Field Type	Notes
entityId	varint
metadata	entityMetadata

---

MC: ClientboundSetEntityLinkPacket

Field Name	Field Type	Notes
entityId	i32
vehicleId	i32

---

MC: ClientboundSetEntityMotionPacket

Field Name	Field Type	Notes
entityId	varint
velocityX	i16
velocityY	i16
velocityZ	i16

---

MC: ClientboundSetEquipmentPacket

Field Name	Field Type	Notes
entityId	varint

---

MC: ClientboundSetExperiencePacket

Field Name	Field Type	Notes
experienceBar	f32
level	varint
totalExperience	varint

---

MC: ClientboundSetHealthPacket

Field Name	Field Type	Notes
health	f32
food	varint
foodSaturation	f32

---

MC: ClientboundSetHeldSlotPacket

Field Name	Field Type	Notes
slot	varint

---

MC: ClientboundSetObjectivePacket

Field Name	Field Type	Notes
name	string
action	i8
displayText if action	is 0 anonymousNbt is 2 anonymousNbt default void
type if action	is 0 varint is 2 varint default void
number format if action	default void
styling if action	if 0 if number format is 1 anonymousNbt is 2 anonymousNbt default void if 2 if number format is 1 anonymousNbt is 2 anonymousNbt default void default void

---

MC: ClientboundSetPassengersPacket

Field Name	Field Type	Notes
entityId	varint
passengers length	varint
passengers array	varint

---

MC: ClientboundSetPlayerInventoryPacket

Field Name	Field Type	Notes
slotId	varint
contents	Slot

---

MC: ClientboundSetPlayerTeamPacket

Field Name	Field Type	Notes
team	string
mode	i8
name if mode	is 0 anonymousNbt is 2 anonymousNbt default void
friendlyFire if mode	is 0 i8 is 2 i8 default void
nameTagVisibility if mode	is 0 varint is 2 varint default void
collisionRule if mode	is 0 varint is 2 varint default void
formatting if mode	is 0 varint is 2 varint default void
prefix if mode	is 0 anonymousNbt is 2 anonymousNbt default void
suffix if mode	is 0 anonymousNbt is 2 anonymousNbt default void
players if mode	is 0 length varint is 0 array string is 3 length varint is 3 array string is 4 length varint is 4 array string default void

---

MC: ClientboundSetScorePacket

Field Name	Field Type	Notes
itemName	string
scoreName	string
value	varint
display name optional	anonymousNbt
number format optional	varint
styling if number format	is 1 anonymousNbt is 2 anonymousNbt default void

---

MC: ClientboundSetSimulationDistancePacket

Field Name	Field Type	Notes
distance	varint

---

MC: ClientboundSetSubtitleTextPacket

Field Name	Field Type	Notes
text	anonymousNbt

---

MC: ClientboundSetTimePacket

Field Name	Field Type	Notes
age	i64
time	i64
tickDayTime	bool

---

MC: ClientboundSetTitleTextPacket

Field Name	Field Type	Notes
text	anonymousNbt

---

MC: ClientboundSetTitlesAnimationPacket

Field Name	Field Type	Notes
fadeIn	i32
stay	i32
fadeOut	i32

---

MC: ClientboundSoundEntityPacket

Field Name	Field Type	Notes
sound	ItemSoundHolder
soundCategory	soundSource
entityId	varint
volume	f32
pitch	f32
seed	i64

---

MC: ClientboundSoundPacket

Field Name	Field Type	Notes
sound	ItemSoundHolder
soundCategory	soundSource
x	i32
y	i32
z	i32
volume	f32
pitch	f32
seed	i64

---

MC: ClientboundStartConfigurationPacket

Field Name	Field Type	Notes

---

Empty MC: ClientboundStopSoundPacket

Field Name	Field Type	Notes
flags	i8
source if flags	is 1 varint is 3 varint default void
sound if flags	is 2 string is 3 string default void

---

MC: ClientboundSystemChatPacket

Field Name	Field Type	Notes
content	anonymousNbt
isActionBar	bool

---

MC: ClientboundTabListPacket

Field Name	Field Type	Notes
header	anonymousNbt
footer	anonymousNbt

---

MC: ClientboundTagQueryPacket

Field Name	Field Type	Notes
transactionId	varint
nbt	anonOptionalNbt

---

MC: ClientboundTakeItemEntityPacket

Field Name	Field Type	Notes
collectedEntityId	varint
collectorEntityId	varint
pickupItemCount	varint

---

MC: ClientboundTeleportEntityPacket

Field Name	Field Type	Notes
entityId	varint
x	f64
y	f64
z	f64
yaw	i8
pitch	i8
onGround	bool

---

MC: ClientboundTestInstanceBlockStatusPacket

Field Name	Field Type	Notes
status	anonymousNbt
size optional	vec3i

---

MC: ClientboundTickingStatePacket

Field Name	Field Type	Notes
tick rate	f32
is frozen	bool

---

MC: ClientboundTickingStepPacket

Field Name	Field Type	Notes
tick steps	varint

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MC: ClientboundUpdateAdvancementsPacket

Field Name	Field Type	Notes
reset	bool
advancementMapping length	varint
advancementMapping array	key string value parentId optional string displayData optional title anonymousNbt description anonymousNbt icon Slot frameType varint backgroundTexture if flags/has background texture is 1 string default void xCord f32 yCord f32 requirements length varint requirements array __2546 length varint __2546 array string sendsTelemtryData bool
identifiers length	varint
identifiers array	string
progressMapping length	varint
progressMapping array	key string value length varint value array criterionIdentifier string criterionProgress optional i64
showAdvancements	bool

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MC: ClientboundUpdateAttributesPacket

Field Name	Field Type	Notes
entityId	varint
properties length	varint
properties array	key varint enum 0 generic.armor 1 generic.armor toughness 2 generic.attack damage 3 generic.attack knockback 4 generic.attack speed 5 player.block break speed 6 player.block interaction range 7 player.entity interaction range 8 generic.fall damage multiplier 9 generic.flying speed 10 generic.follow range 11 generic.gravity 12 generic.jump strength 13 generic.knockback resistance 14 generic.luck 15 generic.max absorption 16 generic.max health 17 generic.movement speed 18 generic.safe fall distance 19 generic.scale 20 zombie.spawn reinforcements 21 generic.step height value f64 modifiers length varint modifiers array uuid string amount f64 operation i8

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MC: ClientboundUpdateMobEffectPacket

Field Name	Field Type	Notes
entityId	varint
effectId	varint
amplifier	varint
duration	varint
flags	u8	a bitfield of 0x01 for ambient, 0x02 for show particles flags: ["bitfield", [ { "name": "unused", "size": 4 }, { "name": "ambient", "size": 1 }, { "name": "showParticles", "size": 1 }, { "name": "showIcon", "size": 1 }, { "name": "blend", "size": 1 } ]]

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MC: ClientboundUpdateRecipesPacket

Field Name	Field Type	Notes
recipes length	varint
recipes array	name string items length varint items array varint
stoneCutterRecipes length	varint
stoneCutterRecipes array	input IDSet slotDisplay SlotDisplay

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MC: ClientboundUpdateTagsPacket

Field Name	Field Type	Notes
tags length	varint
tags array	tagType string tags tags

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MC: ClientboundProjectilePowerPacket

Field Name	Field Type	Notes
id	varint
accelerationPower	f64

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Field Name	Field Type	Notes
name	varint enum 0 bundle delimiter 1 spawn entity 2 animation 3 statistics 4 acknowledge player digging 5 block break animation 6 tile entity data 7 block action 8 block change 9 boss bar 10 difficulty 11 chunk batch finished 12 chunk batch start 13 chunk biomes 14 clear titles 15 tab complete 16 declare commands 17 close window 18 window items 19 craft progress bar 20 set slot 21 cookie request 22 set cooldown 23 chat suggestions 24 custom payload 25 damage event 26 debug sample 27 hide message 28 kick disconnect 29 profileless chat 30 entity status 31 sync entity position 32 explosion 33 unload chunk 34 game state change 35 open horse window 36 hurt animation 37 initialize world border 38 keep alive 39 map chunk 40 world event 41 world particles 42 update light 43 login 44 map 45 trade list 46 rel entity move 47 entity move look 48 move minecart 49 entity look 50 vehicle move 51 open book 52 open window 53 open sign entity 54 ping 55 ping response 56 craft recipe response 57 abilities 58 player chat 59 end combat event 60 enter combat event 61 death combat event 62 player remove 63 player info 64 face player 65 position 66 player rotation 67 recipe book add 68 recipe book remove 69 recipe book settings 70 entity destroy 71 remove entity effect 72 reset score 73 remove resource pack 74 add resource pack 75 respawn 76 entity head rotation 77 multi block change 78 select advancement tab 79 server data 80 action bar 81 world border center 82 world border lerp size 83 world border size 84 world border warning delay 85 world border warning reach 86 camera 87 update view position 88 update view distance 89 set cursor item 90 spawn position 91 scoreboard display objective 92 entity metadata 93 attach entity 94 entity velocity 95 entity equipment 96 experience 97 update health 98 held item slot 99 scoreboard objective 100 set passengers 101 set player inventory 102 teams 103 scoreboard score 104 simulation distance 105 set title subtitle 106 update time 107 set title text 108 set title time 109 entity sound effect 110 sound effect 111 start configuration 112 stop sound 113 store cookie 114 system chat 115 playerlist header 116 nbt query response 117 collect 118 entity teleport 119 test instance block status 120 set ticking state 121 step tick 122 transfer 123 advancements 124 entity update attributes 125 entity effect 126 declare recipes 127 tags 128 set projectile power 129 custom report details 130 server links
params if name	is bundle delimiter void is spawn entity packet_spawn_entity is animation packet_animation is statistics packet_statistics is acknowledge player digging packet_acknowledge_player_digging is block break animation packet_block_break_animation is tile entity data packet_tile_entity_data is block action packet_block_action is block change packet_block_change is boss bar packet_boss_bar is difficulty packet_difficulty is chunk batch finished packet_chunk_batch_finished is chunk batch start packet_chunk_batch_start is chunk biomes packet_chunk_biomes is clear titles packet_clear_titles is tab complete packet_tab_complete is declare commands packet_declare_commands is close window packet_close_window is window items packet_window_items is craft progress bar packet_craft_progress_bar is set slot packet_set_slot is cookie request packet_common_cookie_request is set cooldown packet_set_cooldown is chat suggestions packet_chat_suggestions is custom payload packet_custom_payload is damage event packet_damage_event is debug sample packet_debug_sample is hide message packet_hide_message is kick disconnect packet_kick_disconnect is profileless chat packet_profileless_chat is entity status packet_entity_status is sync entity position packet_sync_entity_position is explosion packet_explosion is unload chunk packet_unload_chunk is game state change packet_game_state_change is open horse window packet_open_horse_window is hurt animation packet_hurt_animation is initialize world border packet_initialize_world_border is keep alive packet_keep_alive is map chunk packet_map_chunk is world event packet_world_event is world particles packet_world_particles is update light packet_update_light is login packet_login is map packet_map is trade list packet_trade_list is rel entity move packet_rel_entity_move is entity move look packet_entity_move_look is move minecart packet_move_minecart is entity look packet_entity_look is vehicle move packet_vehicle_move is open book packet_open_book is open window packet_open_window is open sign entity packet_open_sign_entity is ping packet_ping is ping response packet_ping_response is craft recipe response packet_craft_recipe_response is abilities packet_abilities is player chat packet_player_chat is end combat event packet_end_combat_event is enter combat event packet_enter_combat_event is death combat event packet_death_combat_event is player remove packet_player_remove is player info packet_player_info is face player packet_face_player is position packet_position is player rotation packet_player_rotation is recipe book add packet_recipe_book_add is recipe book remove packet_recipe_book_remove is recipe book settings packet_recipe_book_settings is entity destroy packet_entity_destroy is remove entity effect packet_remove_entity_effect is reset score packet_reset_score is remove resource pack packet_common_remove_resource_pack is add resource pack packet_common_add_resource_pack is respawn packet_respawn is entity head rotation packet_entity_head_rotation is multi block change packet_multi_block_change is select advancement tab packet_select_advancement_tab is server data packet_server_data is action bar packet_action_bar is world border center packet_world_border_center is world border lerp size packet_world_border_lerp_size is world border size packet_world_border_size is world border warning delay packet_world_border_warning_delay is world border warning reach packet_world_border_warning_reach is camera packet_camera is update view position packet_update_view_position is update view distance packet_update_view_distance is set cursor item packet_set_cursor_item is held item slot packet_held_item_slot is spawn position packet_spawn_position is scoreboard display objective packet_scoreboard_display_objective is entity metadata packet_entity_metadata is attach entity packet_attach_entity is entity velocity packet_entity_velocity is entity equipment packet_entity_equipment is experience packet_experience is update health packet_update_health is scoreboard objective packet_scoreboard_objective is set passengers packet_set_passengers is set player inventory packet_set_player_inventory is teams packet_teams is scoreboard score packet_scoreboard_score is simulation distance packet_simulation_distance is set title subtitle packet_set_title_subtitle is update time packet_update_time is set title text packet_set_title_text is set title time packet_set_title_time is entity sound effect packet_entity_sound_effect is sound effect packet_sound_effect is start configuration packet_start_configuration is stop sound packet_stop_sound is store cookie packet_common_store_cookie is system chat packet_system_chat is playerlist header packet_playerlist_header is nbt query response packet_nbt_query_response is collect packet_collect is entity teleport packet_entity_teleport is test instance block status packet_test_instance_block_status is set ticking state packet_set_ticking_state is step tick packet_step_tick is transfer packet_common_transfer is advancements packet_advancements is entity update attributes packet_entity_update_attributes is entity effect packet_entity_effect is declare recipes packet_declare_recipes is tags packet_tags is set projectile power packet_set_projectile_power is custom report details packet_common_custom_report_details is server links packet_common_server_links

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