Key	Name
Type	vec2f
Type	vec3f
Type	vec4f
Type	vec3f64
Type	SoundEvent
Type	RecipeDisplay
Type	SlotDisplay
Type	SlotComponentType
Type	SlotComponent
Type	Slot
Type	FireworkExplosion
Type	BookPage
Type	EffectDetail
Type	PotionEffect
Type	ConsumeEffect
Type	BlockProperty
Type	BlockPredicate
Type	Particle
Type	ingredient
Type	soundSource
Type	packedChunkPos
Type	previousMessages
Type	entityMetadataEntry
Type	EntityMetadataPaintingVariant
Type	EntityMetadataWolfVariant
Type	tags
Type	chunkBlockEntity
Type	chat_session?
Type	game_profile
Type	command_node
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

Datatype

Field Name	Field Type	Notes
x	f32
y	f32

Type

vec3f

Datatype

Field Name	Field Type	Notes
x	f32
y	f32
z	f32

Type

vec4f

Datatype

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

Type

vec3f64

Datatype

Field Name	Field Type	Notes
x	f64
y	f64
z	f64

Type

SoundEvent

Datatype

Field Name	Field Type	Notes
soundName	string
fixedRange optional	f32

Type

RecipeDisplay

Datatype

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

Type

SlotDisplay

Datatype

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 simthing trim

base	SlotDisplay
material	SlotDisplay
pattern	SlotDisplay

is with remainder

input	SlotDisplay
remainder	SlotDisplay

is composite length varint

is composite

array

SlotDisplay

Type

SlotComponentType

Datatype

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	hide additional tooltip
16	hide tooltip
17	repair cost
18	creative slot lock
19	enchantment glint override
20	intangible projectile
21	food
22	consumable
23	use remainder
24	use cooldown
25	damage resistant
26	tool
27	enchantable
28	equippable
29	repairable
30	glider
31	tooltip style
32	death protection
33	stored enchantments
34	dyed color
35	map color
36	map id
37	map decorations
38	map post processing
39	charged projectiles
40	bundle contents
41	potion contents
42	suspicious stew effects
43	writable book content
44	written book content
45	trim
46	debug stick state
47	entity data
48	bucket entity data
49	block entity data
50	instrument
51	ominous bottle amplifier
52	jukebox playable
53	recipes
54	lodestone tracker
55	firework explosion
56	fireworks
57	profile
58	note block sound
59	banner patterns
60	base color
61	pot decorations
62	container
63	block state
64	bees
65	lock
66	container loot

Type

SlotComponent

Datatype

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 bool

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

showTooltip bool

is can place on or can break

predicates length	varint
predicates array	BlockPredicate
showTooltip	bool

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

showTooltip bool

is custom model data varint

is hide additional tooltip void

is hide tooltip void

is repair cost varint

is creative slot lock void

is enchantment glint override bool

is intangible projectile void

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

makes particles bool

effects length varint

effects

array

ConsumeEffect

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

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

model

optional

string

cameraOverlay

optional

string

allowedEntities

optional

IDSet

dispensable bool

swappable bool

damageable bool

is repairable

items IDSet

is tooltip style string

is death protection

effects length	varint
effects array	ConsumeEffect

is stored enchantments

enchantments length varint

enchantments

array

id	varint	The ID of the enchantment in the enchantment registry.
level	varint

showInTooltip

bool

Whether the list of enchantments should be shown on the item's tooltip.

is dyed color

color	varint
showTooltip	bool

is map color varint

is map id varint

is map decorations anonOptionalNbt

is map post processing varint

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	varint	The RGB components of the color, encoded as an integer.
customEffects length	varint
customEffects array	PotionEffect
customName	string

is suspicious stew effects

effects length

varint

Name Type Description Number Of Effects VarInt Number of elements in the following array. Effect Type ID Array VarInt Enum The ID of the effect in the potion effect type registry. Duration VarInt The duration of the effect.

effects

array

effect	varint
duration	varint

is writable book content

pages length	varint	Name Type Description Number Of Pages VarInt Number of elements in the following array. Page Raw Content Array (100) String (1024) The raw text of the page. Has Filtered Content Boolean Filtered Content Optional String (1024) The content after passing through chat filters. Only present if Has Filtered Content is true.
pages array	BookPage

is written book content

rawTitle	string	Name Type Description Raw Title String (32) The raw title of the book. Has Filtered Title Boolean Filtered Title Optional String (32) The title after going through chat filters. Only present if Has Filtered Title is true. Author String Generation VarInt Number Of Pages VarInt Number of elements in the following array. Page Raw Content Array (100) TextComponent (1024) The raw text of the page. Has Filtered Content Boolean Filtered Content Optional Text Component (1024) The content after passing through chat filters. Only present if Has Filtered Content is true. Resolved Boolean Whether entity selectors have already been resolved.
filteredTitle optional	string
author	string
generation	varint
pages length	varint
pages array	BookPage
resolved	bool	Whether entity selectors have already been resolved.

is trim

materialType

varint

Name Type Description Trim Material Type VarInt Identifier used to determine the data that follows. It can be either: 0 - Directly represents a trim material, with the necessary data following. Anything else - References a trim material in its registry, by the ID of Trim Material Type - 1. Asset Name Optional String See Armor Trim Material Registry. Only present if Trim Material Type is 0. Ingredient Optional VarInt See Armor Trim Material Registry. Only present if Trim Material Type is 0. Item Model Index Optional Float See Armor Trim Material Registry. Only present if Trim Material Type is 0. Number of Overrides Optional VarInt See Armor Trim Material Registry. Only present if Trim Material Type is 0. Override Armor Material Type Optional Array VarInt Enum See Armor Trim Material Registry. Only present if Trim Material Type is 0. Overriden Asset Name String See Armor Trim Material Registry. Only present if Trim Material Type is 0. Description Optional Text Component See Armor Trim Material Registry. Only present if Trim Material Type is 0. Trim Pattern Type VarInt Identifier used to determine the data that follows. It can be either: 0 - Directly represents a trim pattern, with the necessary data following. Anything else - References a trim pattern in its registry, by the ID of Trim Pattern Type - 1. Asset Name Optional String See Armor Trim Pattern Registry. Only present if Trim Pattern Type is 0. Template Item Optional VarInt See Armor Trim Pattern Registry. Only present if Trim Pattern Type is 0. Description Optional Text Component See Armor Trim Pattern Registry. Only present if Trim Pattern Type is 0. Decal Optional Boolean See Armor Trim Pattern Registry. Only present if Trim Pattern Type is 0. Show In Tooltip Boolean Whether the trim information should be shown on the item's tooltip. Identifier used to determine the data that follows. It can be either: 0 - Directly represents a trim material, with the necessary data following. Anything else - References a trim material in its registry, by the ID of Trim Material Type - 1.

🔁

if materialType

is 0

assetName string

ingredientId varint

itemModelIndex f32

numberOfOverrides optvarint

override length varint

override

array

armorMaterialType	varint
overridenAssetName	string

description string

trimPatternType varint

🔁

if trimPatternType

is 0

assetName	string
templateItem	varint
description	string
decal	bool

showInTooltip bool

is debug stick state anonymousNbt

is entity data anonymousNbt

is bucket entity data anonymousNbt

is block entity data anonymousNbt

is instrument

instrumentType

varint

Name Type Description Instrument Type VarInt Identifier used to determine the data that follows. It can be either: 0 - Directly represents an instrument, with the necessary data following. Anything else - References an instrument in its registry, by the ID of Instrument Type - 1. Sound Event Optional Sound Event The sound to be played. Only present if Instrument Type is 0. Use duration Optional Float The maximum range of the sound. Only present if Instrument Type is 0. Range Optional Float The range of the instrument. Only present if Instrument Type is 0.

🔁

if instrumentType

is 0

soundEvent	string
useDuration	f32
range	f32

is ominous bottle amplifier varint

is jukebox playable

directMode

bool

Name Type Description Direct Mode Boolean Whether the jukebox song is specified directly, or just referenced by name. Jukebox Song Name Optional Identifier The name of the jukebox song in its respective registry. Only present if Direct Mode is false. Jukebox Song Type Optional VarInt Identifier used to determine the data that follows. It can be either: 0 - Directly represents a jukebox song, with the necessary data following. Anything else - References a jukebox song in its registry, by the ID of Jukebox Song Type - 1. Only present if Direct Mode is true.
Sound Event Optional Sound Event The sound to be played. Only present if Direct Mode is true and Jukebox Song Type is 0. Description Optional Text Component The description shown in the item lore. Only present if Direct Mode is true and Jukebox Song Type is 0. Duration Optional Float The duration the songs should play for, in seconds. Only present if Direct Mode is true and Jukebox Song Type is 0. Output Optional VarInt The output strength given by a comparator. Between 0 and 15. Only present if Direct Mode is true and Jukebox Song Type is 0. Show In Tooltip Boolean Whether the song should be shown on the item's tooltip.

🔁

if directMode

is true

jukeboxSongName string

jukeboxSongType varint

🔁

if jukeboxSongType

is 0

soundEvent

soundEventType varint

🔁

if soundEventType

is 0

soundName	string
fixedRange optional	f32

description anonymousNbt

duration f32

output varint

is false

songLocation string

showInTooltip bool

is recipes anonymousNbt

is lodestone tracker

globalPosition

optional

dimension	string	Name Type Description Has Global Position Boolean Whether this lodestone points to a position, otherwise it spins randomly. Dimension Identifier The dimension the compass points to. Only present if Has Global Position is true. Position Position The position the compass points to. Only present if Has Global Position is true. Tracked Boolean Whether the component is removed when the associated lodestone is broken.
position	position

tracked bool

is firework explosion

FireworkExplosion

Name Type Description Shape VarInt Enum Can be one of the following: 0 - Small ball 1 - Large ball 2 - Star 3 - Creeper 4 - Burst Number Of Colors VarInt The number of elements in the following array. Colors Array of Int The RGB components of the color, encoded as an integer. Number Of Fade Colors VarInt The number of elements in the following array. Fade Colors Array of Int The RGB components of the color, encoded as an integer. Has Trail Boolean
Has Twinkle Boolean

is fireworks

flightDuration	varint
explosions length	varint
explosions array	FireworkExplosion

is profile

hasName

bool

Name Type Description Has Name Boolean
Name Optional String (16) Only present if Has Name is true. Has Unique ID Boolean
Unique ID Optional UUID Only present if Has Unique ID is true. Number of Properties VarInt Number of elements in the following array. Property Name Array String (64)
Value String
Has Signature Boolean
Signature String (1024) Only present if Has Signature is true.

name string

hasUniqueId bool

uniqueId UUID

properties length varint

properties

array

property	string
value	string
hasSignature	bool
signature	string

is note block sound string

is banner patterns

layers length

varint

Name Type Description Number of Layers VarInt Number of elements in the following array. Layer Pattern Type Array VarInt Identifier used to determine the data that follows. It can be either: 0 - Directly represents a pattern, with the necessary data following. Anything else - References a pattern in its registry, by the ID of Pattern Type - 1. Asset ID Optional Identifier Identifier of the asset. Only present if Pattern Type is 0. Translation Key Optional String Only present if Pattern Type is 0. Color Dye Color See Dye Color.

layers

array

patternType varint

🔁

if patternType

is 0

assetId	string
translationKey	string

color varint

is base color varint

is pot decorations

decorations length	varint	The ID of the items in the item registry.
decorations array	varint	The ID of the items in the item registry.

is container

contents length	varint
contents array	Slot

is block state

properties length

varint

Name Type Description Number of Properties VarInt Number of elements in the following array. Property Name Array String
Value String

properties

array

property	string
value	string

is bees

bees length

varint

Name Type Description Number of Bees VarInt Number of elements in the following array. Bee Entity Data Array NBT
Ticks In Hive VarInt
Min Ticks In Hive 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

Type

Slot

Datatype

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

Type

FireworkExplosion

Datatype

Field Name Field Type Notes

shape

varint enum

0	small ball
1	large ball
2	star
3	creeper
4	burst

colors length varint

colors

array

i32

fadeColors length varint

fadeColors

array

i32

hasTrail bool

hasTwinkle bool

Type

BookPage

Datatype

Field Name	Field Type	Notes
content	string
filteredContent optional	string

Type

EffectDetail

Datatype

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

Type

PotionEffect

Datatype

Field Name	Field Type	Notes
id	varint
details	EffectDetail

Type

ConsumeEffect

Datatype

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	PotionEffect
probability	f32

is remove effects

effects IDSet

is clear all effects void

is teleport randomly

diameter f32

is play sound

Type

BlockProperty

Datatype

Field Name	Field Type	Notes
name	string	Name of the block state property.
isExactMatch	bool	Whether this is an exact value match, as opposed to ranged.
exactValue optional	string	Value of the block state property. Only present in exact match mode.
minValue optional	string	Minimum value of the block state property range. Only present in ranged match mode.
maxValue optional	string	Maximum value of the block state property range. Only present in ranged match mode.

Type

BlockPredicate

Datatype

Field Name	Field Type	Notes
properties length	varint
properties array	BlockProperty
nbt	anonOptionalNbt

Type

Particle

Datatype

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	sculk soul
35	sculk charge
36	sculk charge pop
37	soul fire flame
38	soul
39	flash
40	happy villager
41	composter
42	heart
43	instant effect
44	item
45	vibration
46	trail
47	item slime
48	item cobweb
49	item snowball
50	large smoke
51	lava
52	mycelium
53	note
54	poof
55	portal
56	rain
57	smoke
58	white smoke
59	sneeze
60	spit
61	squid ink
62	sweep attack
63	totem of undying
64	underwater
65	splash
66	witch
67	bubble pop
68	current down
69	bubble column up
70	nautilus
71	dolphin
72	campfire cosy smoke
73	campfire signal smoke
74	dripping honey
75	falling honey
76	landing honey
77	falling nectar
78	falling spore blossom
79	ash
80	crimson spore
81	warped spore
82	spore blossom air
83	dripping obsidian tear
84	falling obsidian tear
85	landing obsidian tear
86	reverse portal
87	white ash
88	small flame
89	snowflake
90	dripping dripstone lava
91	falling dripstone lava
92	dripping dripstone water
93	falling dripstone water
94	glow squid ink
95	glow
96	wax on
97	wax off
98	electric spark
99	scrape
100	shriek
101	egg crack
102	dust plume
103	trial spawner detected player
104	trial spawner detected player ominous
105	vault connection
106	dust pillar
107	ominous spawning
108	raid omen
109	trial omen
110	block crumble

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

position type

varint enum

0	block
1	entity

position

if position type

is block position

is entity

entityId	varint
entity eye height	f32

ticks varint

is trail

target	vec3f64
color	u8

Type

soundSource

Datatype

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

Type

packedChunkPos

Datatype

Field Name	Field Type	Notes
z	i32
x	i32

Type

previousMessages

Datatype

Field Name Field Type Notes

previousMessages length varint

previousMessages

array

id varint

signature

if id

default void

Type

entityMetadataEntry

Datatype

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	wolf variant
24	frog variant
25	optional global pos
26	painting variant
27	sniffer state
28	armadillo state
29	vector3
30	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 frog variant varint

is sniffer state varint

is armadillo state varint

is vector3 vec3f

is quaternion vec4f

Type

EntityMetadataPaintingVariant

Datatype

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

Type

EntityMetadataWolfVariant

Datatype

Field Name	Field Type	Notes
wildTexture	string
tameTexture	string
angryTexture	string
biome	IDSet

Type

tags

Datatype

Field Name Field Type Notes

tags length varint

tags

array

tagName	string
entries length	varint
entries array	varint

Type

chunkBlockEntity

Datatype

Field Name	Field Type	Notes
y	i16
type	varint
nbtData	anonOptionalNbt

Type

chat session

Datatype

Field Name Field Type Notes

uuid UUID

publicKey

expireTime i64

Type

game profile

Datatype

Field Name Field Type Notes

name string

properties length varint

properties

array

key	string
value	string
signature optional	string

Type

command node

Datatype

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:template mirror
48	minecraft:template rotation
49	minecraft:heightmap
50	minecraft:loot table
51	minecraft:loot predicate
52	minecraft:loot modifier
53	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

registry string

is minecraft:resource or tag key

registry string

is minecraft:resource

registry string

is minecraft:resource key

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.

Type

packet common cookie request

Datatype

MC: ClientboundCookieRequestPacket

Field Name	Field Type	Notes
cookie	string

Type

packet common store cookie

Datatype

MC: ClientboundStoreCookiePacket

Field Name	Field Type	Notes
key	string
value	ByteArray

Type

packet common transfer

Datatype

MC: ClientboundTransferPacket

Field Name	Field Type	Notes
host	string
port	varint

Type

packet common cookie response

Datatype

MC: ServerboundCookieResponsePacket

Field Name	Field Type	Notes
key	string
value	ByteArray

Type

packet common select known packs

Datatype

MC: ServerboundSelectKnownPacks MC: ClientboundSelectKnownPacks

Field Name Field Type Notes

packs length varint

packs

array

namespace	string
id	string
version	string

Type

packet common custom report details

Datatype

MC: ClientboundCustomReportDetailsPacket

Field Name Field Type Notes

details length varint

details

array

key	string
value	string

Type

packet common remove resource pack

Datatype

MC: ClientboundResourcePackPopPacket

Field Name	Field Type	Notes
uuid optional	UUID

Type

packet common add resource pack

Datatype

MC: ClientboundResourcePackPushPacket

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

Type

ServerLinkType

Datatype

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

Type

packet common server links

Datatype

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

Key	Name
Type	packet

Type

packet

Datatype

Field Name Field Type Notes

name

varint enum

Key	Name
Type	packet_set_protocol
0xfe	packet_legacy_server_list_ping
Type	packet

packet set protocol

handshaking / toServer / packet_set_protocol (0x00)

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

254

packet legacy server list ping

handshaking / toServer / packet_legacy_server_list_ping (0xfe)

Field Name	Field Type	Notes
payload	u8

Type

packet

handshaking / toServer / packet

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

Key	Name
Type	packet_server_info
0x1	packet_ping
Type	packet

packet server info

status / toClient / packet_server_info (0x00)

MC: ClientboundStatusResponsePacket

Field Name	Field Type	Notes
response	string

packet ping

status / toClient / packet_ping (0x01)

MC: ClientboundPongResponsePacket

Field Name	Field Type	Notes
time	i64

Type

packet

status / toClient / packet

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

Key	Name
Type	packet_ping_start
0x1	packet_ping
Type	packet

packet ping start

status / toServer / packet_ping_start (0x00)

MC: ServerboundStatusRequestPacket

Field Name	Field Type	Notes

packet ping

status / toServer / packet_ping (0x01)

Empty MC: ServerboundPingRequestPacket

Field Name	Field Type	Notes
time	i64

Type

packet

status / toServer / packet

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

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

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

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

packet custom payload

configuration / toClient / packet_custom_payload (0x01)

MC: ClientboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

packet disconnect

configuration / toClient / packet_disconnect (0x02)

MC: ClientboundDisconnectPacket

Field Name	Field Type	Notes
reason	anonymousNbt

packet finish configuration

configuration / toClient / packet_finish_configuration (0x03)

MC: ClientboundFinishConfigurationPacket

Field Name	Field Type	Notes

packet keep alive

configuration / toClient / packet_keep_alive (0x04)

Empty MC: ClientboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

packet ping

configuration / toClient / packet_ping (0x05)

MC: ClientboundPingPacket

Field Name	Field Type	Notes
id	i32

packet reset chat

configuration / toClient / packet_reset_chat (0x06)

MC: ClientboundResetChatPacket

Field Name	Field Type	Notes

packet registry data

configuration / toClient / packet_registry_data (0x07)

Empty MC: ClientboundRegistryDataPacket

Field Name Field Type Notes

string

The server can send multiple registries

entries length varint

entries

array

key	string
value optional	anonymousNbt

packet feature flags

configuration / toClient / packet_feature_flags (0x0c)

MC: ClientboundUpdateEnabledFeaturesPacket

Field Name	Field Type	Notes
features length	varint
features array	string

packet tags

configuration / toClient / packet_tags (0x0d)

MC: ClientboundUpdateTagsPacket

Field Name Field Type Notes

tags length varint

tags

array

tagType	string
tags	tags

Type

packet

configuration / toClient / packet

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

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

packet settings

configuration / toServer / packet_settings (0x00)

MC: ServerboundClientInformationPacket

Field Name	Field Type	Notes
locale	string
viewDistance	i8
chatFlags	varint
chatColors	bool
skinParts	u8
mainHand	varint
enableTextFiltering	bool
enableServerListing	bool
particles	varint

packet custom payload

configuration / toServer / packet_custom_payload (0x02)

MC: ServerboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

packet finish configuration

configuration / toServer / packet_finish_configuration (0x03)

MC: ServerboundFinishConfigurationPacket

Field Name	Field Type	Notes

packet keep alive

configuration / toServer / packet_keep_alive (0x04)

Empty MC: ServerboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

packet pong

configuration / toServer / packet_pong (0x05)

MC: ServerboundPongPacket

Field Name	Field Type	Notes
id	i32

packet resource pack receive

configuration / toServer / packet_resource_pack_receive (0x06)

MC: ServerboundResourcePackPacket

Field Name	Field Type	Notes
uuid	UUID
result	varint

Type

packet

configuration / toServer / packet

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_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

Key	Name
Type	SpawnInfo
0x1	packet_spawn_entity
0x2	packet_spawn_entity_experience_orb
0x3	packet_animation
0x4	packet_statistics
0x5	packet_acknowledge_player_digging
0x6	packet_block_break_animation
0x7	packet_tile_entity_data
0x8	packet_block_action
0x9	packet_block_change
0xa	packet_boss_bar
0xb	packet_difficulty
0xc	packet_chunk_batch_finished
0xd	packet_chunk_batch_start
0xe	packet_chunk_biomes
0xf	packet_clear_titles
0x10	packet_tab_complete
0x11	packet_declare_commands
0x12	packet_close_window
0x13	packet_window_items
0x14	packet_craft_progress_bar
0x15	packet_set_slot
0x17	packet_set_cooldown
0x18	packet_chat_suggestions
0x19	packet_custom_payload
0x1a	packet_damage_event
0x1b	packet_debug_sample
0x1c	packet_hide_message
0x1d	packet_kick_disconnect
Type	ChatTypeParameterType
Type	ChatType
Type	ChatTypes
0x1e	packet_profileless_chat
0x1f	packet_entity_status
0x20	packet_sync_entity_position
0x21	packet_explosion
0x22	packet_unload_chunk
0x23	packet_game_state_change
0x24	packet_open_horse_window
0x25	packet_hurt_animation
0x26	packet_initialize_world_border
0x27	packet_keep_alive
0x28	packet_map_chunk
0x29	packet_world_event
0x2a	packet_world_particles
0x2b	packet_update_light
0x2c	packet_login
0x2d	packet_map
0x2e	packet_trade_list
0x2f	packet_rel_entity_move
0x30	packet_entity_move_look
0x31	packet_move_minecart
0x32	packet_entity_look
0x33	packet_vehicle_move
0x34	packet_open_book
0x35	packet_open_window
0x36	packet_open_sign_entity
0x37	packet_ping
0x38	packet_ping_response
0x39	packet_craft_recipe_response
0x3a	packet_abilities
0x3b	packet_player_chat
0x3c	packet_end_combat_event
0x3d	packet_enter_combat_event
0x3e	packet_death_combat_event
0x3f	packet_player_remove
0x40	packet_player_info
0x41	packet_face_player
0x42	packet_position
0x43	packet_player_rotation
0x44	packet_recipe_book_add
0x45	packet_recipe_book_remove
0x46	packet_recipe_book_settings
0x47	packet_entity_destroy
0x48	packet_remove_entity_effect
0x49	packet_reset_score
0x4c	packet_respawn
0x4d	packet_entity_head_rotation
0x4e	packet_multi_block_change
0x4f	packet_select_advancement_tab
0x50	packet_server_data
0x51	packet_action_bar
0x52	packet_world_border_center
0x53	packet_world_border_lerp_size
0x54	packet_world_border_size
0x55	packet_world_border_warning_delay
0x56	packet_world_border_warning_reach
0x57	packet_camera
0x58	packet_update_view_position
0x59	packet_update_view_distance
0x5a	packet_set_cursor_item
0x5b	packet_spawn_position
0x5c	packet_scoreboard_display_objective
0x5d	packet_entity_metadata
0x5e	packet_attach_entity
0x5f	packet_entity_velocity
0x60	packet_entity_equipment
0x61	packet_experience
0x62	packet_update_health
0x63	packet_held_item_slot
0x64	packet_scoreboard_objective
0x65	packet_set_passengers
0x66	packet_set_player_inventory
0x67	packet_teams
0x68	packet_scoreboard_score
0x69	packet_simulation_distance
0x6a	packet_set_title_subtitle
0x6b	packet_update_time
0x6c	packet_set_title_text
0x6d	packet_set_title_time
0x6e	packet_entity_sound_effect
0x6f	packet_sound_effect
0x70	packet_start_configuration
0x71	packet_stop_sound
0x73	packet_system_chat
0x74	packet_playerlist_header
0x75	packet_nbt_query_response
0x76	packet_collect
0x77	packet_entity_teleport
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

Type

SpawnInfo

play / toClient / SpawnInfo

World state information for spawn and respawn packets 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

packet spawn entity

play / toClient / packet_spawn_entity (0x01)

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

packet spawn entity experience orb

play / toClient / packet_spawn_entity_experience_orb (0x02)

MC: ClientboundAddExperienceOrbPacket

Field Name	Field Type	Notes
entityId	varint
x	f64
y	f64
z	f64
count	i16

packet animation

play / toClient / packet_animation (0x03)

MC: ClientboundAnimatePacket

Field Name	Field Type	Notes
entityId	varint
animation	u8

packet statistics

play / toClient / packet_statistics (0x04)

MC: ClientboundAwardStatsPacket

Field Name Field Type Notes

entries length varint

entries

array

categoryId	varint
statisticId	varint
value	varint

packet acknowledge player digging

play / toClient / packet_acknowledge_player_digging (0x05)

MC: ClientboundBlockChangedAckPacket

Field Name	Field Type	Notes
sequenceId	varint

packet block break animation

play / toClient / packet_block_break_animation (0x06)

MC: ClientboundBlockDestructionPacket

Field Name	Field Type	Notes
entityId	varint
location	position
destroyStage	i8

packet tile entity data

play / toClient / packet_tile_entity_data (0x07)

MC: ClientboundBlockEntityDataPacket

Field Name	Field Type	Notes
location	position
action	varint
nbtData	anonOptionalNbt

packet block action

play / toClient / packet_block_action (0x08)

MC: ClientboundBlockEventPacket

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

packet block change

play / toClient / packet_block_change (0x09)

MC: ClientboundBlockUpdatePacket

Field Name	Field Type	Notes
location	position
type	varint

packet boss bar

play / toClient / packet_boss_bar (0x0a)

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

packet difficulty

play / toClient / packet_difficulty (0x0b)

MC: ClientboundChangeDifficultyPacket

Field Name	Field Type	Notes
difficulty	u8
difficultyLocked	bool

packet chunk batch finished

play / toClient / packet_chunk_batch_finished (0x0c)

MC: ClientboundChunkBatchFinishedPacket

Field Name	Field Type	Notes
batchSize	varint

packet chunk batch start

play / toClient / packet_chunk_batch_start (0x0d)

MC: ClientboundChunkBatchStartPacket

Field Name	Field Type	Notes

packet chunk biomes

play / toClient / packet_chunk_biomes (0x0e)

Empty MC: ClientboundChunksBiomesPacket

Field Name Field Type Notes

biomes length varint

biomes

array

position	packedChunkPos
data	ByteArray

packet clear titles

play / toClient / packet_clear_titles (0x0f)

MC: ClientboundClearTitlesPacket

Field Name	Field Type	Notes
reset	bool

packet tab complete

play / toClient / packet_tab_complete (0x10)

MC: ClientboundCommandSuggestionsPacket

Field Name Field Type Notes

transactionId varint

start varint

length varint

matches length varint

matches

array

match	string
tooltip optional	anonymousNbt

packet declare commands

play / toClient / packet_declare_commands (0x11)

MC: ClientboundCommandsPacket

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

packet close window

play / toClient / packet_close_window (0x12)

MC: ClientboundContainerClosePacket

Field Name	Field Type	Notes
windowId	ContainerID

packet window items

play / toClient / packet_window_items (0x13)

MC: ClientboundContainerSetContentPacket

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

packet craft progress bar

play / toClient / packet_craft_progress_bar (0x14)

MC: ClientboundContainerSetDataPacket

Field Name	Field Type	Notes
windowId	ContainerID
property	i16
value	i16

packet set slot

play / toClient / packet_set_slot (0x15)

MC: ClientboundContainerSetSlotPacket

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

packet set cooldown

play / toClient / packet_set_cooldown (0x17)

MC: ClientboundCooldownPacket

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

packet chat suggestions

play / toClient / packet_chat_suggestions (0x18)

MC: ClientboundCustomChatCompletionsPacket

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

packet custom payload

play / toClient / packet_custom_payload (0x19)

MC: ClientboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

packet damage event

play / toClient / packet_damage_event (0x1a)

MC: ClientboundDamageEventPacket

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

packet debug sample

play / toClient / packet_debug_sample (0x1b)

MC: ClientboundDebugSamplePacket

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

packet hide message

play / toClient / packet_hide_message (0x1c)

MC: ClientboundDeleteChatPacket

Field Name Field Type Notes

id varint

signature

if id

default void

packet kick disconnect

play / toClient / packet_kick_disconnect (0x1d)

MC: ClientboundDisconnectPacket

Field Name	Field Type	Notes
reason	anonymousNbt

Type

ChatTypeParameterType

Datatype

Field Name Field Type Notes

ChatTypeParameterType

varint enum

0	content
1	sender
2	target

Type

ChatType

play / toClient / ChatType

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

Type

ChatTypes

play / toClient / ChatTypes

Field Name Field Type Notes

registryIndex

varint

Either the extra data is retrieved from the registry (via this ID+1 if non-zero), or it's supplied inline in the chat packet

🔁

if registryIndex

is 0

chat	ChatType
narration	ChatType

default void

packet profileless chat

play / toClient / packet_profileless_chat (0x1e)

MC: ClientboundDisguisedChatPacket

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

packet entity status

play / toClient / packet_entity_status (0x1f)

MC: ClientboundEntityEventPacket

Field Name	Field Type	Notes
entityId	i32
entityStatus	i8

packet sync entity position

play / toClient / packet_sync_entity_position (0x20)

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

packet explosion

play / toClient / packet_explosion (0x21)

MC: ClientboundExplodePacket

Field Name Field Type Notes

center vec3f

playerKnockback

optional

vec3f

explosionParticle Particle

soundId varint

🔁

if soundId

is 0

soundName	string
range optional	f32

default

packet unload chunk

play / toClient / packet_unload_chunk (0x22)

MC: ClientboundForgetLevelChunkPacket

Field Name	Field Type	Notes
chunkZ	i32
chunkX	i32

packet game state change

play / toClient / packet_game_state_change (0x23)

MC: ClientboundGameEventPacket

Field Name	Field Type	Notes
reason	u8
gameMode	f32

packet open horse window

play / toClient / packet_open_horse_window (0x24)

MC: ClientboundHorseScreenOpenPacket

Field Name	Field Type	Notes
windowId	ContainerID
nbSlots	varint
entityId	i32

packet hurt animation

play / toClient / packet_hurt_animation (0x25)

MC: ClientboundHurtAnimationPacket

Field Name	Field Type	Notes
entityId	varint
yaw	f32

packet initialize world border

play / toClient / packet_initialize_world_border (0x26)

MC: ClientboundInitializeBorderPacket

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

packet keep alive

play / toClient / packet_keep_alive (0x27)

MC: ClientboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

packet map chunk

play / toClient / packet_map_chunk (0x28)

MC: ClientboundLevelChunkWithLightPacket

Field Name Field Type Notes

x i32

z i32

heightmaps anonymousNbt

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

__1897 length	varint
__1897 array	u8

blockLight length varint

blockLight

array

__1899 length	varint
__1899 array	u8

packet world event

play / toClient / packet_world_event (0x29)

MC: ClientboundLevelEventPacket

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

packet world particles

play / toClient / packet_world_particles (0x2a)

MC: ClientboundLevelParticlesPacket

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

packet update light

play / toClient / packet_update_light (0x2b)

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

__1927 length	varint
__1927 array	u8

blockLight length varint

blockLight

array

__1929 length	varint
__1929 array	u8

packet login

play / toClient / packet_login (0x2c)

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

packet map

play / toClient / packet_map (0x2d)

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

packet trade list

play / toClient / packet_trade_list (0x2e)

MC: ClientboundMerchantOffersPacket

Field Name Field Type Notes

windowId ContainerID

trades length varint

trades

array

inputItem1

itemId	varint
itemCount	varint
addedComponentCount	varint
Length for components below is addedComponentCount* from above*
components array	SlotComponent

outputItem Slot

inputItem2

optional

itemId	varint
itemCount	varint
addedComponentCount	varint
Length for components below is addedComponentCount* from above*
components array	SlotComponent

tradeDisabled bool

nbTradeUses i32

maximumNbTradeUses i32

xp i32

specialPrice i32

priceMultiplier f32

demand i32

villagerLevel varint

experience varint

isRegularVillager bool

canRestock bool

packet rel entity move

play / toClient / packet_rel_entity_move (0x2f)

MC: ClientboundMoveEntityPacket.Pos

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

packet entity move look

play / toClient / packet_entity_move_look (0x30)

MC: ClientboundMoveEntityPacket.PosRot

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

packet move minecart

play / toClient / packet_move_minecart (0x31)

MC: ClientboundMoveMinecartPacket

Field Name Field Type Notes

entityId varint

steps length varint

steps

array

position	vec3f
movement	vec3f
yaw	f32
pitch	f32
weight	f32

packet entity look

play / toClient / packet_entity_look (0x32)

MC: ClientboundMoveEntityPacket.Rot

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

packet vehicle move

play / toClient / packet_vehicle_move (0x33)

MC: ClientboundMoveVehiclePacket

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

packet open book

play / toClient / packet_open_book (0x34)

MC: ClientboundOpenBookPacket

Field Name	Field Type	Notes
hand	varint

packet open window

play / toClient / packet_open_window (0x35)

MC: ClientboundOpenScreenPacket

Field Name	Field Type	Notes
windowId	varint
inventoryType	varint
windowTitle	anonymousNbt

packet open sign entity

play / toClient / packet_open_sign_entity (0x36)

MC: ClientboundOpenSignEditorPacket

Field Name	Field Type	Notes
location	position
isFrontText	bool

packet ping

play / toClient / packet_ping (0x37)

MC: ClientboundPingPacket

Field Name	Field Type	Notes
id	i32

packet ping response

play / toClient / packet_ping_response (0x38)

MC: ClientboundPongResponsePacket

Field Name	Field Type	Notes
id	i64

packet craft recipe response

play / toClient / packet_craft_recipe_response (0x39)

MC: ClientboundPlaceGhostRecipePacket

Field Name	Field Type	Notes
windowId	ContainerID
recipeDisplay	RecipeDisplay

packet abilities

play / toClient / packet_abilities (0x3a)

MC: ClientboundPlayerAbilitiesPacket

Field Name	Field Type	Notes
flags	i8
flyingSpeed	f32
walkingSpeed	f32

packet player chat

play / toClient / packet_player_chat (0x3b)

MC: ClientboundPlayerChatPacket

Field Name Field Type Notes

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 ChatTypes

networkName anonymousNbt

networkTargetName

optional

anonymousNbt

packet end combat event

play / toClient / packet_end_combat_event (0x3c)

MC: ClientboundPlayerCombatEndPacket

Field Name	Field Type	Notes
duration	varint

packet enter combat event

play / toClient / packet_enter_combat_event (0x3d)

MC: ClientboundPlayerCombatEnterPacket

Field Name	Field Type	Notes

packet death combat event

play / toClient / packet_death_combat_event (0x3e)

Empty MC: ClientboundPlayerCombatKillPacket

Field Name	Field Type	Notes
playerId	varint
message	anonymousNbt

packet player remove

play / toClient / packet_player_remove (0x3f)

MC: ClientboundPlayerInfoRemovePacket

Field Name	Field Type	Notes
players length	varint
players array	UUID

packet player info

play / toClient / packet_player_info (0x40)

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

is true	anonOptionalNbt
default	void

listPriority

if ../action/update priority

is true	varint
default	void

packet face player

play / toClient / packet_face_player (0x41)

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

packet position

play / toClient / packet_position (0x42)

https://github.com/extremeheat/extractedminecraftdata/blob/client1.21.2/client/net/minecraft/world/entity/Relative.java#L82 PositionUpdateRelatives: ["bitfield", [

unused bits on top

{ "name": "unused", "size": 23, "signed": false }, { "name": "yawDelta", "size": 1, "signed": false }, { "name": "dz", "size": 1, "signed": false }, { "name": "dy", "size": 1, "signed": false }, { "name": "dx", "size": 1, "signed": false }, { "name": "pitch", "size": 1, "signed": false }, { "name": "yaw", "size": 1, "signed": false }, { "name": "z", "size": 1, "signed": false }, { "name": "y", "size": 1, "signed": false }, { "name": "x", "size": 1, "signed": false }, ]] 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

packet player rotation

play / toClient / packet_player_rotation (0x43)

MC: ClientboundPlayerRotationPacket

Field Name	Field Type	Notes
yaw	f32
pitch	f32

packet recipe book add

play / toClient / packet_recipe_book_add (0x44)

MC: ClientboundRecipeBookAddPacket

Field Name Field Type Notes

entries length varint

entries

array

recipe

displayId

varint

RecipeDisplayEntry

display RecipeDisplay

group optvarint

tags

array

tagType	string
tags	tags

128

packet set projectile power

play / toClient / packet_set_projectile_power (0x80)

MC: ClientboundProjectilePowerPacket

Field Name	Field Type	Notes
id	varint
accelerationPower	f64

Type

packet

play / toClient / packet

Field Name Field Type Notes

name

varint enum

0	bundle delimiter
1	spawn entity
2	spawn entity experience orb
3	animation
4	statistics
5	acknowledge player digging
6	block break animation
7	tile entity data
8	block action
9	block change
10	boss bar
11	difficulty
12	chunk batch finished
13	chunk batch start
14	chunk biomes
15	clear titles
16	tab complete
17	declare commands
18	close window
19	window items
20	craft progress bar
21	set slot
22	cookie request
23	set cooldown
24	chat suggestions
25	custom payload
26	damage event
27	debug sample
28	hide message
29	kick disconnect
30	profileless chat
31	entity status
32	sync entity position
33	explosion
34	unload chunk
35	game state change
36	open horse window
37	hurt animation
38	initialize world border
39	keep alive
40	map chunk
41	world event
42	world particles
43	update light
44	login
45	map
46	trade list
47	rel entity move
48	entity move look
49	move minecart
50	entity look
51	vehicle move
52	open book
53	open window
54	open sign entity
55	ping
56	ping response
57	craft recipe response
58	abilities
59	player chat
60	end combat event
61	enter combat event
62	death combat event
63	player remove
64	player info
65	face player
66	position
67	player rotation
68	recipe book add
69	recipe book remove
70	recipe book settings
71	entity destroy
72	remove entity effect
73	reset score
74	remove resource pack
75	add resource pack
76	respawn
77	entity head rotation
78	multi block change
79	select advancement tab
80	server data
81	action bar
82	world border center
83	world border lerp size
84	world border size
85	world border warning delay
86	world border warning reach
87	camera
88	update view position
89	update view distance
90	set cursor item
91	spawn position
92	scoreboard display objective
93	entity metadata
94	attach entity
95	entity velocity
96	entity equipment
97	experience
98	update health
99	held item slot
100	scoreboard objective
101	set passengers
102	set player inventory
103	teams
104	scoreboard score
105	simulation distance
106	set title subtitle
107	update time
108	set title text
109	set title time
110	entity sound effect
111	sound effect
112	start configuration
113	stop sound
114	store cookie
115	system chat
116	playerlist header
117	nbt query response
118	collect
119	entity teleport
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 spawn entity experience orb	packet_spawn_entity_experience_orb
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 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

Key	Name
Type	packet_teleport_confirm
0x1	packet_query_block_nbt
0x2	packet_select_bundle_item
0x3	packet_set_difficulty
0x4	packet_message_acknowledgement
0x5	packet_chat_command
0x6	packet_chat_command_signed
0x7	packet_chat_message
0x8	packet_chat_session_update
0x9	packet_chunk_batch_received
0xa	packet_client_command
0xb	packet_tick_end
0xc	packet_settings
0xd	packet_tab_complete
0xe	packet_configuration_acknowledged
0xf	packet_enchant_item
0x10	packet_window_click
0x11	packet_close_window
0x12	packet_set_slot_state
0x14	packet_custom_payload
Type	packet_debug_sample_subscription
0x16	packet_edit_book
0x17	packet_query_entity_nbt
0x18	packet_use_entity
0x19	packet_generate_structure
0x1a	packet_keep_alive
0x1b	packet_lock_difficulty
0x1c	packet_position
0x1d	packet_position_look
0x1e	packet_look
0x1f	packet_flying
0x20	packet_vehicle_move
0x21	packet_steer_boat
0x22	packet_pick_item
0x23	packet_ping_request
0x24	packet_craft_recipe_request
0x25	packet_abilities
0x26	packet_block_dig
0x27	packet_entity_action
0x28	packet_player_input
0x29	packet_pong
0x2a	packet_recipe_book
0x2b	packet_displayed_recipe
0x2c	packet_name_item
0x2d	packet_resource_pack_receive
0x2e	packet_advancement_tab
0x2f	packet_select_trade
0x30	packet_set_beacon_effect
0x31	packet_held_item_slot
0x32	packet_update_command_block
0x33	packet_update_command_block_minecart
0x34	packet_set_creative_slot
0x35	packet_update_jigsaw_block
0x36	packet_update_structure_block
0x37	packet_update_sign
0x38	packet_arm_animation
0x39	packet_spectate
0x3a	packet_block_place
0x3b	packet_use_item
Type	packet

packet teleport confirm

play / toServer / packet_teleport_confirm (0x00)

MC: ServerboundAcceptTeleportationPacket

Field Name	Field Type	Notes
teleportId	varint

packet query block nbt

play / toServer / packet_query_block_nbt (0x01)

MC: ServerboundBlockEntityTagQueryPacket

Field Name	Field Type	Notes
transactionId	varint
location	position

packet select bundle item

play / toServer / packet_select_bundle_item (0x02)

MC: ServerboundSelectBundleItemPacket

Field Name	Field Type	Notes
slotId	varint
selectedItemIndex	varint

packet set difficulty

play / toServer / packet_set_difficulty (0x03)

MC: ServerboundChangeDifficultyPacket

Field Name	Field Type	Notes
newDifficulty	u8

packet message acknowledgement

play / toServer / packet_message_acknowledgement (0x04)

MC: ServerboundChatAckPacket

Field Name	Field Type	Notes
count	varint

packet chat command

play / toServer / packet_chat_command (0x05)

MC: ServerboundChatCommandPacket

Field Name	Field Type	Notes
command	string

packet chat command signed

play / toServer / packet_chat_command_signed (0x06)

MC: ServerboundChatCommandSignedPacket

Field Name Field Type Notes

command string

timestamp i64

salt i64

argumentSignatures length varint

argumentSignatures

array

argumentName string

messageCount varint

packet chat message

play / toServer / packet_chat_message (0x07)

MC: ServerboundChatPacket

Field Name	Field Type	Notes
message	string
timestamp	i64
salt	i64
offset	varint

packet chat session update

play / toServer / packet_chat_session_update (0x08)

MC: ServerboundChatSessionUpdatePacket

Field Name	Field Type	Notes
sessionUUID	UUID
expireTime	i64
publicKey	ByteArray
signature	ByteArray

packet chunk batch received

play / toServer / packet_chunk_batch_received (0x09)

MC: ServerboundChunkBatchReceivedPacket

Field Name	Field Type	Notes
chunksPerTick	f32

packet client command

play / toServer / packet_client_command (0x0a)

MC: ServerboundClientCommandPacket

Field Name	Field Type	Notes
actionId	varint

packet tick end

play / toServer / packet_tick_end (0x0b)

MC: ServerboundClientTickEndPacket

Field Name	Field Type	Notes

packet settings

play / toServer / packet_settings (0x0c)

Empty 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

packet tab complete

play / toServer / packet_tab_complete (0x0d)

MC: ServerboundCommandSuggestionPacket

Field Name	Field Type	Notes
transactionId	varint
text	string

packet configuration acknowledged

play / toServer / packet_configuration_acknowledged (0x0e)

MC: ServerboundConfigurationAcknowledgedPacket

Field Name	Field Type	Notes

packet enchant item

play / toServer / packet_enchant_item (0x0f)

Empty MC: ServerboundContainerButtonClickPacket

Field Name	Field Type	Notes
windowId	ContainerID
enchantment	i8

packet window click

play / toServer / packet_window_click (0x10)

MC: ServerboundContainerClickPacket

Field Name Field Type Notes

windowId ContainerID

stateId varint

slot i16

mouseButton i8

mode varint

changedSlots length varint

changedSlots

array

location	i16
item	Slot

cursorItem Slot

packet close window

play / toServer / packet_close_window (0x11)

MC: ServerboundContainerClosePacket

Field Name	Field Type	Notes
windowId	ContainerID

packet set slot state

play / toServer / packet_set_slot_state (0x12)

MC: ServerboundContainerSlotStateChangedPacket

Field Name	Field Type	Notes
slot id	varint
window id	ContainerID
state	bool

packet custom payload

play / toServer / packet_custom_payload (0x14)

MC: ServerboundCustomPayloadPacket

Field Name	Field Type	Notes
channel	string
data	restBuffer

Type

packet debug sample subscription

play / toServer / packet_debug_sample_subscription

MC: ServerboundDebugSampleSubscriptionPacket

Field Name	Field Type	Notes
type	varint

packet edit book

play / toServer / packet_edit_book (0x16)

MC: ServerboundEditBookPacket

Field Name	Field Type	Notes
hand	varint
pages length	varint
pages array	string
title optional	string

packet query entity nbt

play / toServer / packet_query_entity_nbt (0x17)

MC: ServerboundEntityTagQuery

Field Name	Field Type	Notes
transactionId	varint
entityId	varint

packet use entity

play / toServer / packet_use_entity (0x18)

MC: ServerboundInteractPacket

Field Name Field Type Notes

target varint

mouse varint

x

if mouse

is 2	f32
default	void

y

if mouse

is 2	f32
default	void

z

if mouse

is 2	f32
default	void

hand

if mouse

is 0	varint
is 2	varint
default	void

sneaking bool

packet generate structure

play / toServer / packet_generate_structure (0x19)

MC: ServerboundJigsawGeneratePacket

Field Name	Field Type	Notes
location	position
levels	varint
keepJigsaws	bool

packet keep alive

play / toServer / packet_keep_alive (0x1a)

MC: ServerboundKeepAlivePacket

Field Name	Field Type	Notes
keepAliveId	i64

packet lock difficulty

play / toServer / packet_lock_difficulty (0x1b)

MC: ServerboundLockDifficultyPacket

Field Name	Field Type	Notes
locked	bool

packet position

play / toServer / packet_position (0x1c)

MC: ServerboundMovePlayerPacket.Pos

Field Name	Field Type	Notes
x	f64
y	f64
z	f64
flags	MovementFlags

packet position look

play / toServer / packet_position_look (0x1d)

MC: ServerboundMovePlayerPacket.PosRot

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

packet look

play / toServer / packet_look (0x1e)

MC: ServerboundMovePlayerPacket.Rot

Field Name	Field Type	Notes
yaw	f32
pitch	f32
flags	MovementFlags

packet flying

play / toServer / packet_flying (0x1f)

MC: ServerboundMovePlayerPacket.StatusOnly

Field Name	Field Type	Notes
flags	MovementFlags

packet vehicle move

play / toServer / packet_vehicle_move (0x20)

MC: ServerboundMoveVehiclePacket

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

packet steer boat

play / toServer / packet_steer_boat (0x21)

MC: ServerboundPaddleBoatPacket

Field Name	Field Type	Notes
leftPaddle	bool
rightPaddle	bool

packet pick item

play / toServer / packet_pick_item (0x22)

MC: ServerboundPickItemPacket

Field Name	Field Type	Notes
slot	varint

packet ping request

play / toServer / packet_ping_request (0x23)

MC: ServerboundPingRequestPacket

Field Name	Field Type	Notes
id	i64

packet craft recipe request

play / toServer / packet_craft_recipe_request (0x24)

MC: ServerboundPlaceRecipePacket

Field Name	Field Type	Notes
windowId	ContainerID
recipeId	varint
makeAll	bool

packet abilities

play / toServer / packet_abilities (0x25)

MC: ServerboundPlayerAbilitiesPacket

Field Name	Field Type	Notes
flags	i8

packet block dig

play / toServer / packet_block_dig (0x26)

MC: ServerboundPlayerActionPacket

Field Name	Field Type	Notes
status	varint
location	position
face	i8
sequence	varint

packet entity action

play / toServer / packet_entity_action (0x27)

MC: ServerboundPlayerCommandPacket

Field Name	Field Type	Notes
entityId	varint
actionId	varint
jumpBoost	varint

packet player input

play / toServer / packet_player_input (0x28)

MC: ServerboundPlayerInputPacket previously: packetsteervehicle

Field Name	Field Type	Notes

packet pong

play / toServer / packet_pong (0x29)

MC: ServerboundPongPacket

Field Name	Field Type	Notes
id	i32

packet recipe book

play / toServer / packet_recipe_book (0x2a)

MC: ServerboundRecipeBookChangeSettingsPacket

Field Name	Field Type	Notes
bookId	varint
bookOpen	bool
filterActive	bool

packet displayed recipe

play / toServer / packet_displayed_recipe (0x2b)

MC: ServerboundRecipeBookSeenRecipePacket

Field Name	Field Type	Notes
recipeId	varint

packet name item

play / toServer / packet_name_item (0x2c)

MC: ServerboundRenameItemPacket

Field Name	Field Type	Notes
name	string

packet resource pack receive

play / toServer / packet_resource_pack_receive (0x2d)

MC: ServerboundResourcePackPacket

Field Name	Field Type	Notes
uuid	UUID
result	varint

packet advancement tab

play / toServer / packet_advancement_tab (0x2e)

MC: ServerboundSeenAdvancementsPacket

Field Name Field Type Notes

action varint

tabId

if action

is 0	string
is 1	void

packet select trade

play / toServer / packet_select_trade (0x2f)

MC: ServerboundSelectTradePacket

Field Name	Field Type	Notes
slot	varint

packet set beacon effect

play / toServer / packet_set_beacon_effect (0x30)

MC: ServerboundSetBeaconPacket

Field Name	Field Type	Notes
primary effect optional	varint
secondary effect optional	varint

packet held item slot

play / toServer / packet_held_item_slot (0x31)

MC: ServerboundSetCarriedItemPacket

Field Name	Field Type	Notes
slotId	i16

packet update command block

play / toServer / packet_update_command_block (0x32)

MC: ServerboundSetCommandBlockPacket

Field Name	Field Type	Notes
location	position
command	string
mode	varint
flags	u8

packet update command block minecart

play / toServer / packet_update_command_block_minecart (0x33)

MC: ServerboundSetCommandMinecartPacket

Field Name	Field Type	Notes
entityId	varint
command	string
track output	bool

packet set creative slot

play / toServer / packet_set_creative_slot (0x34)

MC: ServerboundSetCreativeModeSlotPacket

Field Name	Field Type	Notes
slot	i16
item	Slot

packet update jigsaw block

play / toServer / packet_update_jigsaw_block (0x35)

MC: ServerboundSetJigsawBlockPacket

Field Name	Field Type	Notes
location	position
name	string
target	string
pool	string
finalState	string
jointType	string
selection priority	varint
placement priority	varint

packet update structure block

play / toServer / packet_update_structure_block (0x36)

MC: ServerboundSetStructureBlockPacket

Field Name	Field Type	Notes
location	position
action	varint
mode	varint
name	string
offset x	i8
offset y	i8
offset z	i8
size x	i8
size y	i8
size z	i8
mirror	varint
rotation	varint
metadata	string
integrity	f32
seed	varint
flags	u8

packet update sign

play / toServer / packet_update_sign (0x37)

MC: ServerboundSignUpdatePacket

Field Name	Field Type	Notes
location	position
isFrontText	bool
text1	string
text2	string
text3	string
text4	string

packet arm animation

play / toServer / packet_arm_animation (0x38)

MC: ServerboundSwingPacket

Field Name	Field Type	Notes
hand	varint

packet spectate

play / toServer / packet_spectate (0x39)

MC: ServerboundTeleportToEntityPacket

Field Name	Field Type	Notes
target	UUID

packet block place

play / toServer / packet_block_place (0x3a)

MC: ServerboundUseItemOnPacket

Field Name	Field Type	Notes
hand	varint
location	position
direction	varint
cursorX	f32
cursorY	f32
cursorZ	f32
insideBlock	bool
worldBorderHit	bool
sequence	varint

packet use item

play / toServer / packet_use_item (0x3b)

MC: ServerboundUseItemPacket

Field Name	Field Type	Notes
hand	varint
sequence	varint
rotation	vec2f

Type

packet

play / toServer / packet

Field Name Field Type Notes

name

varint enum

0	teleport confirm
1	query block nbt
2	select bundle item
3	set difficulty
4	message acknowledgement
5	chat command
6	chat command signed
7	chat message
8	chat session update
9	chunk batch received
10	client command
11	tick end
12	settings
13	tab complete
14	configuration acknowledged
15	enchant item	Maybe rename enchant_item if it is used for other things too
16	window click
17	close window
18	set slot state
19	cookie response
20	custom payload
21	debug sample subscription
22	edit book
23	query entity nbt
24	use entity
25	generate structure
26	keep alive
27	lock difficulty
28	position
29	position look
30	look
31	flying
32	vehicle move
33	steer boat
34	pick item
35	ping request
36	craft recipe request
37	abilities
38	block dig
39	entity action
40	player input
41	pong
42	recipe book
43	displayed recipe
44	name item
45	resource pack receive
46	advancement tab
47	select trade
48	set beacon effect
49	held item slot
50	update command block
51	update command block minecart
52	set creative slot
53	update jigsaw block
54	update structure block
55	update sign
56	arm animation
57	spectate
58	block place
59	use item

params

if name

is teleport confirm	packet_teleport_confirm
is query block nbt	packet_query_block_nbt
is select bundle item	packet_select_bundle_item
is set difficulty	packet_set_difficulty
is message acknowledgement	packet_message_acknowledgement
is chat command	packet_chat_command
is chat command signed	packet_chat_command_signed
is chat message	packet_chat_message
is chat session update	packet_chat_session_update
is chunk batch received	packet_chunk_batch_received
is client command	packet_client_command
is tick end	packet_tick_end
is settings	packet_settings
is tab complete	packet_tab_complete
is configuration acknowledged	packet_configuration_acknowledged
is enchant item	packet_enchant_item
is window click	packet_window_click
is close window	packet_close_window
is set slot state	packet_set_slot_state
is cookie response	packet_common_cookie_response
is custom payload	packet_custom_payload
is edit book	packet_edit_book
is query entity nbt	packet_query_entity_nbt
is use entity	packet_use_entity
is generate structure	packet_generate_structure
is keep alive	packet_keep_alive
is lock difficulty	packet_lock_difficulty
is position	packet_position
is position look	packet_position_look
is look	packet_look
is flying	packet_flying
is vehicle move	packet_vehicle_move
is steer boat	packet_steer_boat
is pick item	packet_pick_item
is ping request	packet_ping_request
is craft recipe request	packet_craft_recipe_request
is abilities	packet_abilities
is block dig	packet_block_dig
is entity action	packet_entity_action
is player input	packet_player_input
is pong	packet_pong
is recipe book	packet_recipe_book
is displayed recipe	packet_displayed_recipe
is name item	packet_name_item
is resource pack receive	packet_resource_pack_receive
is advancement tab	packet_advancement_tab
is select trade	packet_select_trade
is set beacon effect	packet_set_beacon_effect
is held item slot	packet_held_item_slot
is update command block	packet_update_command_block
is update command block minecart	packet_update_command_block_minecart
is set creative slot	packet_set_creative_slot
is update jigsaw block	packet_update_jigsaw_block
is update structure block	packet_update_structure_block
is update sign	packet_update_sign
is arm animation	packet_arm_animation
is spectate	packet_spectate
is block place	packet_block_place
is use item	packet_use_item

Table of Contents

Shared Packets

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Table of Contents

unused bits on top

Table of Contents