Table of Contents

KeyName
Typeslot
Typeparticle
TypeparticleData
Typeingredient
TypeentityMetadataItem
Typeminecraft_smelting_format
Typetags
TypechunkBlockEntity
Typecommand_node


Type
slot
Datatype

Field NameField TypeNotes
present bool
🔁

if present
is false void
is true
itemId varint
itemCount i8
nbtData optionalNbt



Type
particle
Datatype

Field NameField TypeNotes
particleId varint



Type
particleData
Datatype

Field NameField TypeNotes
particleData

if compareTo
is 2
blockState varint
is 3
blockState varint
is 14
red f32
green f32
blue f32
scale f32
is 15
fromRed f32
fromGreen f32
fromBlue f32
scale f32
toRed f32
toGreen f32
toBlue f32
is 25
blockState varint
is 30
rotation f32
is 39
item slot
is 40
positionType string
entityId

if positionType
is minecraft:entity varint
default void
entityEyeHeight

if positionType
is minecraft:entity varint
default void
destination

if positionType
is minecraft:block position
is minecraft:entity varint
ticks varint
is 92
delayInTicksBeforeShown varint
default void




Field NameField TypeNotes
entityMetadataItem

if compareTo
is 0 i8
is 1 varint
is 2 f32
is 3 string
is 4 string
is 6 slot
is 7 bool
is 8
pitch f32
yaw f32
roll f32
is 9 position
is 11 varint
is 13 varint
is 14 nbt
is 15 particle
is 16
villagerType varint
villagerProfession varint
level varint
is 17 optvarint
is 18 varint




Field NameField TypeNotes
group string
ingredient ingredient
result slot
experience f32
cookTime varint



Type
tags
Datatype

Field NameField TypeNotes
tags lengthvarint
tags
array
tagName string
entries lengthvarint
entries
array
varint




Field NameField TypeNotes
y i16
type varint
nbtData optionalNbt



Type
command node
Datatype

Field NameField TypeNotes
children lengthvarint
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
0brigadier:bool
1brigadier:float
2brigadier:double
3brigadier:integer
4brigadier:long
5brigadier:string
6minecraft:entity
7minecraft:game profile
8minecraft:block pos
9minecraft:column pos
10minecraft:vec3
11minecraft:vec2
12minecraft:block state
13minecraft:block predicate
14minecraft:item stack
15minecraft:item predicate
16minecraft:color
17minecraft:component
18minecraft:message
19minecraft:nbt
20minecraft:nbt tag
21minecraft:nbt path
22minecraft:objective
23minecraft:objective criteria
24minecraft:operation
25minecraft:particle
26minecraft:angle
27minecraft:rotation
28minecraft:scoreboard slot
29minecraft:score holder
30minecraft:swizzle
31minecraft:team
32minecraft:item slot
33minecraft:resource location
34minecraft:mob effect
35minecraft:function
36minecraft:entity anchor
37minecraft:int range
38minecraft:float range
39minecraft:item enchantment
40minecraft:entity summon
41minecraft:dimension
42minecraft:time
43minecraft:resource or tag
44minecraft:resource
45minecraft:template mirror
46minecraft:template rotation
47minecraft: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
0SINGLE WORD
1QUOTABLE PHRASE
2GREEDY 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:mob effect void
is minecraft:function void
is minecraft:entity anchor void
is minecraft:int range void
is minecraft:float range void
is minecraft:item enchantment void
is minecraft:entity summon void
is minecraft:dimension void
is minecraft:time void
is minecraft:resource or tag
registry string
is minecraft:resource
registry string
is minecraft:template mirror void
is minecraft:template rotation void
is minecraft:uuid void
suggestionType

if ../flags/has custom suggestions
is 1 string
default void



Table of Contents

KeyName
Typepacket


Type
packet
Datatype

Field NameField TypeNotes
name
varint enum



Table of Contents

KeyName
Typepacket_set_protocol
0xfepacket_legacy_server_list_ping
Typepacket


0
packet set protocol
handshaking / toServer / packet_set_protocol (0x00)

Field NameField TypeNotes
protocolVersion varint
serverHost string
serverPort u16
nextState varint



254
packet legacy server list ping
handshaking / toServer / packet_legacy_server_list_ping (0xfe)

Field NameField TypeNotes
payload u8



Type
packet
handshaking / toServer / packet

Field NameField TypeNotes
name
varint enum
0set protocol
254legacy 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

KeyName
Typepacket_server_info
0x1packet_ping
Typepacket


0
packet server info
status / toClient / packet_server_info (0x00)

Field NameField TypeNotes
response string



1
packet ping
status / toClient / packet_ping (0x01)

Field NameField TypeNotes
time i64



Type
packet
status / toClient / packet

Field NameField TypeNotes
name
varint enum
0server info
1ping
params

if name
is server info packet_server_info
is ping packet_ping



Table of Contents

KeyName
Typepacket_ping_start
0x1packet_ping
Typepacket


1
packet ping
status / toServer / packet_ping (0x01)

Field NameField TypeNotes
time i64



Type
packet
status / toServer / packet

Field NameField TypeNotes
name
varint enum
0ping start
1ping
params

if name
is ping start packet_ping_start
is ping packet_ping



Table of Contents

KeyName
Typepacket_disconnect
0x1packet_encryption_begin
0x2packet_success
0x3packet_compress
0x4packet_login_plugin_request
Typepacket


0
packet disconnect
login / toClient / packet_disconnect (0x00)

Field NameField TypeNotes
reason string



1
packet encryption begin
login / toClient / packet_encryption_begin (0x01)

Field NameField TypeNotes
serverId string



2
packet success
login / toClient / packet_success (0x02)

Field NameField TypeNotes
uuid UUID
username string
properties lengthvarint
properties
array
name string
value string
signature
optional
string



3
packet compress
login / toClient / packet_compress (0x03)

Field NameField TypeNotes
threshold varint



4
packet login plugin request
login / toClient / packet_login_plugin_request (0x04)

Field NameField TypeNotes
messageId varint
channel string
data restBuffer



Type
packet
login / toClient / packet

Field NameField TypeNotes
name
varint enum
0disconnect
1encryption begin
2success
3compress
4login plugin 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



Table of Contents

KeyName
Typepacket_login_start
0x1packet_encryption_begin
0x2packet_login_plugin_response
Typepacket


0
packet login start
login / toServer / packet_login_start (0x00)

Field NameField TypeNotes
username string
signature
optional
timestamp i64



1
packet encryption begin
login / toServer / packet_encryption_begin (0x01)

Field NameField TypeNotes
hasVerifyToken bool
crypto

if hasVerifyToken
is true
is false
salt i64



2
packet login plugin response
login / toServer / packet_login_plugin_response (0x02)

Field NameField TypeNotes
messageId varint
data
optional
restBuffer



Type
packet
login / toServer / packet

Field NameField TypeNotes
name
varint enum
0login start
1encryption begin
2login plugin response
params

if name
is login start packet_login_start
is encryption begin packet_encryption_begin
is login plugin response packet_login_plugin_response



Table of Contents

KeyName
Typepacket_spawn_entity
0x1packet_spawn_entity_experience_orb
0x2packet_named_entity_spawn
0x3packet_animation
0x4packet_statistics
0x64packet_advancements
0x6packet_block_break_animation
0x7packet_tile_entity_data
0x8packet_block_action
0x9packet_block_change
0xapacket_boss_bar
0xbpacket_difficulty
0xcpacket_chat_preview
0xepacket_tab_complete
0xfpacket_declare_commands
0x35packet_face_player
0x61packet_nbt_query_response
0x3dpacket_multi_block_change
0x10packet_close_window
0x2bpacket_open_window
0x11packet_window_items
0x12packet_craft_progress_bar
0x13packet_set_slot
0x14packet_set_cooldown
0x15packet_custom_payload
0x16packet_named_sound_effect
0x17packet_kick_disconnect
0x18packet_entity_status
0x19packet_explosion
0x1apacket_unload_chunk
0x1bpacket_game_state_change
0x1cpacket_open_horse_window
0x1epacket_keep_alive
0x1fpacket_map_chunk
0x20packet_world_event
0x21packet_world_particles
0x22packet_update_light
0x23packet_login
0x24packet_map
0x25packet_trade_list
0x26packet_rel_entity_move
0x27packet_entity_move_look
0x28packet_entity_look
0x29packet_vehicle_move
0x2apacket_open_book
0x2cpacket_open_sign_entity
0x2epacket_craft_recipe_response
0x2fpacket_abilities
0x30packet_player_chat
0x31packet_end_combat_event
Typepacket_enter_combat_event
0x33packet_death_combat_event
0x34packet_player_info
0x36packet_position
0x37packet_unlock_recipes
0x38packet_entity_destroy
0x39packet_remove_entity_effect
0x3apacket_resource_pack_send
0x3bpacket_respawn
0x3cpacket_entity_head_rotation
0x46packet_camera
0x47packet_held_item_slot
0x48packet_update_view_position
0x49packet_update_view_distance
0x4bpacket_should_display_chat_preview
0x4cpacket_scoreboard_display_objective
0x4dpacket_entity_metadata
0x4epacket_attach_entity
0x4fpacket_entity_velocity
0x50packet_entity_equipment
0x51packet_experience
0x52packet_update_health
0x53packet_scoreboard_objective
0x54packet_set_passengers
0x55packet_teams
0x56packet_scoreboard_score
0x4apacket_spawn_position
0x59packet_update_time
0x5cpacket_entity_sound_effect
0x5epacket_stop_sound
0x5dpacket_sound_effect
0x5fpacket_system_chat
0x60packet_playerlist_header
0x62packet_collect
0x63packet_entity_teleport
0x65packet_entity_update_attributes
0x66packet_entity_effect
0x3epacket_select_advancement_tab
0x3fpacket_server_data
0x67packet_declare_recipes
0x68packet_tags
0x5packet_acknowledge_player_digging
0xdpacket_clear_titles
0x1dpacket_initialize_world_border
0x40packet_action_bar
0x41packet_world_border_center
0x42packet_world_border_lerp_size
0x43packet_world_border_size
0x44packet_world_border_warning_delay
0x45packet_world_border_warning_reach
0x2dpacket_ping
0x58packet_set_title_subtitle
0x5apacket_set_title_text
0x5bpacket_set_title_time
0x57packet_simulation_distance
Typepacket


0
packet spawn entity
play / toClient / packet_spawn_entity (0x00)

Field NameField TypeNotes
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



1
packet spawn entity experience orb
play / toClient / packet_spawn_entity_experience_orb (0x01)

Field NameField TypeNotes
entityId varint
x f64
y f64
z f64
count i16



2
packet named entity spawn
play / toClient / packet_named_entity_spawn (0x02)

Field NameField TypeNotes
entityId varint
playerUUID UUID
x f64
y f64
z f64
yaw i8
pitch i8



3
packet animation
play / toClient / packet_animation (0x03)

Field NameField TypeNotes
entityId varint
animation u8



4
packet statistics
play / toClient / packet_statistics (0x04)

Field NameField TypeNotes
entries lengthvarint
entries
array
categoryId varint
statisticId varint
value varint



100
packet advancements
play / toClient / packet_advancements (0x64)

Field NameField TypeNotes
reset bool
advancementMapping lengthvarint
advancementMapping
array
key string
value
parentId
optional
string
displayData
optional
title string
description string
icon slot
frameType varint
backgroundTexture

if flags/has background texture
is 1 string
default void
xCord f32
yCord f32
criteria lengthvarint
criteria
array
key string
value void
requirements lengthvarint
requirements
array
__722 lengthvarint
__722
array
string
identifiers lengthvarint
identifiers
array
string
progressMapping lengthvarint
progressMapping
array
key string
value lengthvarint
value
array
criterionIdentifier string
criterionProgress
optional
i64



6
packet block break animation
play / toClient / packet_block_break_animation (0x06)

Field NameField TypeNotes
entityId varint
location position
destroyStage i8



7
packet tile entity data
play / toClient / packet_tile_entity_data (0x07)

Field NameField TypeNotes
location position
action varint
nbtData optionalNbt



8
packet block action
play / toClient / packet_block_action (0x08)

Field NameField TypeNotes
location position
byte1 u8
byte2 u8
blockId varint



9
packet block change
play / toClient / packet_block_change (0x09)

Field NameField TypeNotes
location position
type varint



10
packet boss bar
play / toClient / packet_boss_bar (0x0a)

Field NameField TypeNotes
entityUUID UUID
action varint
title

if action
is 0 string
is 3 string
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



11
packet difficulty
play / toClient / packet_difficulty (0x0b)

Field NameField TypeNotes
difficulty u8
difficultyLocked bool



12
packet chat preview
play / toClient / packet_chat_preview (0x0c)

Field NameField TypeNotes
queryId i32
message
optional
string



14
packet tab complete
play / toClient / packet_tab_complete (0x0e)

Field NameField TypeNotes
transactionId varint
start varint
length varint
matches lengthvarint
matches
array
match string
tooltip
optional
string



15
packet declare commands
play / toClient / packet_declare_commands (0x0f)

Field NameField TypeNotes
nodes lengthvarint
nodes
array
command_node
rootIndex varint



53
packet face player
play / toClient / packet_face_player (0x35)

Field NameField TypeNotes
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 string
default void



97
packet nbt query response
play / toClient / packet_nbt_query_response (0x61)

Field NameField TypeNotes
transactionId varint
nbt optionalNbt



61
packet multi block change
play / toClient / packet_multi_block_change (0x3d)

Field NameField TypeNotes
notTrustEdges bool
records lengthvarint
records
array
varint



16
packet close window
play / toClient / packet_close_window (0x10)

Field NameField TypeNotes
windowId u8



43
packet open window
play / toClient / packet_open_window (0x2b)

Field NameField TypeNotes
windowId varint
inventoryType varint
windowTitle string



17
packet window items
play / toClient / packet_window_items (0x11)

Field NameField TypeNotes
windowId u8
stateId varint
items lengthvarint
items
array
slot
carriedItem slot



18
packet craft progress bar
play / toClient / packet_craft_progress_bar (0x12)

Field NameField TypeNotes
windowId u8
property i16
value i16



19
packet set slot
play / toClient / packet_set_slot (0x13)

Field NameField TypeNotes
windowId i8
stateId varint
slot i16
item slot



20
packet set cooldown
play / toClient / packet_set_cooldown (0x14)

Field NameField TypeNotes
itemID varint
cooldownTicks varint



21
packet custom payload
play / toClient / packet_custom_payload (0x15)

Field NameField TypeNotes
channel string
data restBuffer



22
packet named sound effect
play / toClient / packet_named_sound_effect (0x16)

Field NameField TypeNotes
soundName string
soundCategory varint
x i32
y i32
z i32
volume f32
pitch f32
seed i64



23
packet kick disconnect
play / toClient / packet_kick_disconnect (0x17)

Field NameField TypeNotes
reason string



24
packet entity status
play / toClient / packet_entity_status (0x18)

Field NameField TypeNotes
entityId i32
entityStatus i8



25
packet explosion
play / toClient / packet_explosion (0x19)

Field NameField TypeNotes
x f32
y f32
z f32
radius f32
affectedBlockOffsets lengthvarint
affectedBlockOffsets
array
x i8
y i8
z i8
playerMotionX f32
playerMotionY f32
playerMotionZ f32



26
packet unload chunk
play / toClient / packet_unload_chunk (0x1a)

Field NameField TypeNotes
chunkX i32
chunkZ i32



27
packet game state change
play / toClient / packet_game_state_change (0x1b)

Field NameField TypeNotes
reason u8
gameMode f32



28
packet open horse window
play / toClient / packet_open_horse_window (0x1c)

Field NameField TypeNotes
windowId u8
nbSlots varint
entityId i32



30
packet keep alive
play / toClient / packet_keep_alive (0x1e)

Field NameField TypeNotes
keepAliveId i64



31
packet map chunk
play / toClient / packet_map_chunk (0x1f)

Field NameField TypeNotes
x i32
z i32
heightmaps nbt
blockEntities lengthvarint
blockEntities
array
chunkBlockEntity
trustEdges bool
skyLightMask lengthvarint
skyLightMask
array
i64
blockLightMask lengthvarint
blockLightMask
array
i64
emptySkyLightMask lengthvarint
emptySkyLightMask
array
i64
emptyBlockLightMask lengthvarint
emptyBlockLightMask
array
i64
skyLight lengthvarint
skyLight
array
__903 lengthvarint
__903
array
u8
blockLight lengthvarint
blockLight
array
__905 lengthvarint
__905
array
u8



32
packet world event
play / toClient / packet_world_event (0x20)

Field NameField TypeNotes
effectId i32
location position
data i32
global bool



33
packet world particles
play / toClient / packet_world_particles (0x21)

Field NameField TypeNotes
particleId varint
longDistance bool
x f64
y f64
z f64
offsetX f32
offsetY f32
offsetZ f32
particleData f32
particles i32



34
packet update light
play / toClient / packet_update_light (0x22)

Field NameField TypeNotes
chunkX varint
chunkZ varint
trustEdges bool
skyLightMask lengthvarint
skyLightMask
array
i64
blockLightMask lengthvarint
blockLightMask
array
i64
emptySkyLightMask lengthvarint
emptySkyLightMask
array
i64
emptyBlockLightMask lengthvarint
emptyBlockLightMask
array
i64
skyLight lengthvarint
skyLight
array
__937 lengthvarint
__937
array
u8
blockLight lengthvarint
blockLight
array
__939 lengthvarint
__939
array
u8



35
packet login
play / toClient / packet_login (0x23)

Field NameField TypeNotes
entityId i32
isHardcore bool
gameMode u8
previousGameMode i8
worldNames lengthvarint
worldNames
array
string
dimensionCodec nbt
worldType string
worldName string
hashedSeed i64
maxPlayers varint
viewDistance varint
simulationDistance varint
reducedDebugInfo bool
enableRespawnScreen bool
isDebug bool
isFlat bool
death
optional
dimensionName string
location position



36
packet map
play / toClient / packet_map (0x24)

Field NameField TypeNotes
itemDamage varint
scale i8
locked bool
icons lengthvarint
icons
array
type varint
x i8
z i8
direction u8
displayName
optional
string
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



37
packet trade list
play / toClient / packet_trade_list (0x25)

Field NameField TypeNotes
windowId varint
trades lengthu8
trades
array
inputItem1 slot
outputItem slot
inputItem2 slot
tradeDisabled bool
nbTradeUses i32
maximumNbTradeUses i32
xp i32
specialPrice i32
priceMultiplier f32
demand i32
villagerLevel varint
experience varint
isRegularVillager bool
canRestock bool



38
packet rel entity move
play / toClient / packet_rel_entity_move (0x26)

Field NameField TypeNotes
entityId varint
dX i16
dY i16
dZ i16
onGround bool



39
packet entity move look
play / toClient / packet_entity_move_look (0x27)

Field NameField TypeNotes
entityId varint
dX i16
dY i16
dZ i16
yaw i8
pitch i8
onGround bool



40
packet entity look
play / toClient / packet_entity_look (0x28)

Field NameField TypeNotes
entityId varint
yaw i8
pitch i8
onGround bool



41
packet vehicle move
play / toClient / packet_vehicle_move (0x29)

Field NameField TypeNotes
x f64
y f64
z f64
yaw f32
pitch f32



42
packet open book
play / toClient / packet_open_book (0x2a)

Field NameField TypeNotes
hand varint



44
packet open sign entity
play / toClient / packet_open_sign_entity (0x2c)

Field NameField TypeNotes
location position



46
packet craft recipe response
play / toClient / packet_craft_recipe_response (0x2e)

Field NameField TypeNotes
windowId i8
recipe string



47
packet abilities
play / toClient / packet_abilities (0x2f)

Field NameField TypeNotes
flags i8
flyingSpeed f32
walkingSpeed f32



48
packet player chat
play / toClient / packet_player_chat (0x30)

Field NameField TypeNotes
signedChatContent string
unsignedChatContent
optional
string
type varint
senderUuid UUID
senderName string
senderTeam
optional
string
timestamp i64
salt i64



49
packet end combat event
play / toClient / packet_end_combat_event (0x31)

Field NameField TypeNotes
duration varint
entityId i32



51
packet death combat event
play / toClient / packet_death_combat_event (0x33)

Field NameField TypeNotes
playerId varint
entityId i32
message string



52
packet player info
play / toClient / packet_player_info (0x34)

Field NameField TypeNotes
action varint
data lengthvarint
data
array
UUID UUID
name

if ../action
is 0 string
default void
properties

if ../action
is 0 lengthvarint
is 0
array
name string
value string
signature
optional
string
default void
gamemode

if ../action
is 0 varint
is 1 varint
default void
ping

if ../action
is 0 varint
is 2 varint
default void
displayName

if ../action
default void
crypto

if ../action
default void



54
packet position
play / toClient / packet_position (0x36)

Field NameField TypeNotes
x f64
y f64
z f64
yaw f32
pitch f32
flags i8
teleportId varint
dismountVehicle bool



55
packet unlock recipes
play / toClient / packet_unlock_recipes (0x37)

Field NameField TypeNotes
action varint
craftingBookOpen bool
filteringCraftable bool
smeltingBookOpen bool
filteringSmeltable bool
blastFurnaceOpen bool
filteringBlastFurnace bool
smokerBookOpen bool
filteringSmoker bool
recipes1 lengthvarint
recipes1
array
string
recipes2

if action
is 0 lengthvarint
is 0
array
string
default void



56
packet entity destroy
play / toClient / packet_entity_destroy (0x38)

Field NameField TypeNotes
entityIds lengthvarint
entityIds
array
varint



57
packet remove entity effect
play / toClient / packet_remove_entity_effect (0x39)

Field NameField TypeNotes
entityId varint
effectId varint



58
packet resource pack send
play / toClient / packet_resource_pack_send (0x3a)

Field NameField TypeNotes
url string
hash string
forced bool
promptMessage
optional
string



59
packet respawn
play / toClient / packet_respawn (0x3b)

Field NameField TypeNotes
dimension string
worldName string
hashedSeed i64
gamemode u8
previousGamemode u8
isDebug bool
isFlat bool
copyMetadata bool
death
optional
dimensionName string
location position



60
packet entity head rotation
play / toClient / packet_entity_head_rotation (0x3c)

Field NameField TypeNotes
entityId varint
headYaw i8



70
packet camera
play / toClient / packet_camera (0x46)

Field NameField TypeNotes
cameraId varint



71
packet held item slot
play / toClient / packet_held_item_slot (0x47)

Field NameField TypeNotes
slot i8



72
packet update view position
play / toClient / packet_update_view_position (0x48)

Field NameField TypeNotes
chunkX varint
chunkZ varint



73
packet update view distance
play / toClient / packet_update_view_distance (0x49)

Field NameField TypeNotes
viewDistance varint



75
packet should display chat preview
play / toClient / packet_should_display_chat_preview (0x4b)

Field NameField TypeNotes
should display chat preview bool



76
packet scoreboard display objective
play / toClient / packet_scoreboard_display_objective (0x4c)

Field NameField TypeNotes
position i8
name string



77
packet entity metadata
play / toClient / packet_entity_metadata (0x4d)

Field NameField TypeNotes
entityId varint
metadata entityMetadata



78
packet attach entity
play / toClient / packet_attach_entity (0x4e)

Field NameField TypeNotes
entityId i32
vehicleId i32



79
packet entity velocity
play / toClient / packet_entity_velocity (0x4f)

Field NameField TypeNotes
entityId varint
velocityX i16
velocityY i16
velocityZ i16



80
packet entity equipment
play / toClient / packet_entity_equipment (0x50)

Field NameField TypeNotes
entityId varint



81
packet experience
play / toClient / packet_experience (0x51)

Field NameField TypeNotes
experienceBar f32
level varint
totalExperience varint



82
packet update health
play / toClient / packet_update_health (0x52)

Field NameField TypeNotes
health f32
food varint
foodSaturation f32



83
packet scoreboard objective
play / toClient / packet_scoreboard_objective (0x53)

Field NameField TypeNotes
name string
action i8
displayText

if action
is 0 string
is 2 string
default void
type

if action
is 0 varint
is 2 varint
default void



84
packet set passengers
play / toClient / packet_set_passengers (0x54)

Field NameField TypeNotes
entityId varint
passengers lengthvarint
passengers
array
varint



85
packet teams
play / toClient / packet_teams (0x55)

Field NameField TypeNotes
team string
mode i8
name

if mode
is 0 string
is 2 string
default void
friendlyFire

if mode
is 0 i8
is 2 i8
default void
nameTagVisibility

if mode
is 0 string
is 2 string
default void
collisionRule

if mode
is 0 string
is 2 string
default void
formatting

if mode
is 0 varint
is 2 varint
default void
prefix

if mode
is 0 string
is 2 string
default void
suffix

if mode
is 0 string
is 2 string
default void
players

if mode
is 0 lengthvarint
is 0
array
string
is 3 lengthvarint
is 3
array
string
is 4 lengthvarint
is 4
array
string
default void



86
packet scoreboard score
play / toClient / packet_scoreboard_score (0x56)

Field NameField TypeNotes
itemName string
action varint
scoreName string
value

if action
is 1 void
default varint



74
packet spawn position
play / toClient / packet_spawn_position (0x4a)

Field NameField TypeNotes
location position
angle f32



89
packet update time
play / toClient / packet_update_time (0x59)

Field NameField TypeNotes
age i64
time i64



92
packet entity sound effect
play / toClient / packet_entity_sound_effect (0x5c)

Field NameField TypeNotes
soundId varint
soundCategory varint
entityId varint
volume f32
pitch f32
seed i64



94
packet stop sound
play / toClient / packet_stop_sound (0x5e)

Field NameField TypeNotes
flags i8
source

if flags
is 1 varint
is 3 varint
default void
sound

if flags
is 2 string
is 3 string
default void



93
packet sound effect
play / toClient / packet_sound_effect (0x5d)

Field NameField TypeNotes
soundId varint
soundCategory varint
x i32
y i32
z i32
volume f32
pitch f32
seed i64



95
packet system chat
play / toClient / packet_system_chat (0x5f)

Field NameField TypeNotes
content string
type varint



96
packet playerlist header
play / toClient / packet_playerlist_header (0x60)

Field NameField TypeNotes
header string
footer string



98
packet collect
play / toClient / packet_collect (0x62)

Field NameField TypeNotes
collectedEntityId varint
collectorEntityId varint
pickupItemCount varint



99
packet entity teleport
play / toClient / packet_entity_teleport (0x63)

Field NameField TypeNotes
entityId varint
x f64
y f64
z f64
yaw i8
pitch i8
onGround bool



101
packet entity update attributes
play / toClient / packet_entity_update_attributes (0x65)

Field NameField TypeNotes
entityId varint
properties lengthvarint
properties
array
key string
value f64
modifiers lengthvarint
modifiers
array
uuid UUID
amount f64
operation i8



102
packet entity effect
play / toClient / packet_entity_effect (0x66)

Field NameField TypeNotes
entityId varint
effectId varint
amplifier i8
duration varint
hideParticles i8
factorCodec
optional
nbt



62
packet select advancement tab
play / toClient / packet_select_advancement_tab (0x3e)

Field NameField TypeNotes
id
optional
string



63
packet server data
play / toClient / packet_server_data (0x3f)

Field NameField TypeNotes
motd
optional
string
icon
optional
string
previewsChat bool



103
packet declare recipes
play / toClient / packet_declare_recipes (0x67)

Field NameField TypeNotes
recipes lengthvarint
recipes
array
type string
recipeId string
data

if type
is minecraft:crafting shapeless
group string
ingredients lengthvarint
ingredients
array
ingredient
result slot
is minecraft:crafting shaped
width varint
height varint
group string
Length for ingredients below is width from above
ingredients
array
Length for __1372 below is height from above
__1372
array
ingredient
result slot
is minecraft:crafting special armordye void
is minecraft:crafting special bookcloning void
is minecraft:crafting special mapcloning void
is minecraft:crafting special mapextending void
is minecraft:crafting special firework rocket void
is minecraft:crafting special firework star void
is minecraft:crafting special firework star fade void
is minecraft:crafting special repairitem void
is minecraft:crafting special tippedarrow void
is minecraft:crafting special bannerduplicate void
is minecraft:crafting special banneraddpattern void
is minecraft:crafting special shielddecoration void
is minecraft:crafting special shulkerboxcoloring void
is minecraft:crafting special suspiciousstew void
is minecraft:smelting minecraft_smelting_format
is minecraft:blasting minecraft_smelting_format
is minecraft:smoking minecraft_smelting_format
is minecraft:campfire cooking minecraft_smelting_format
is minecraft:stonecutting
group string
ingredient ingredient
result slot
is minecraft:smithing
base ingredient
addition ingredient
result slot



104
packet tags
play / toClient / packet_tags (0x68)

Field NameField TypeNotes
tags lengthvarint
tags
array
tagType string
tags tags



5
packet acknowledge player digging
play / toClient / packet_acknowledge_player_digging (0x05)

Field NameField TypeNotes
sequenceId varint



13
packet clear titles
play / toClient / packet_clear_titles (0x0d)

Field NameField TypeNotes
reset bool



29
packet initialize world border
play / toClient / packet_initialize_world_border (0x1d)

Field NameField TypeNotes
x f64
z f64
oldDiameter f64
newDiameter f64
speed varint
portalTeleportBoundary varint
warningBlocks varint
warningTime varint



64
packet action bar
play / toClient / packet_action_bar (0x40)

Field NameField TypeNotes
text string



65
packet world border center
play / toClient / packet_world_border_center (0x41)

Field NameField TypeNotes
x f64
z f64



66
packet world border lerp size
play / toClient / packet_world_border_lerp_size (0x42)

Field NameField TypeNotes
oldDiameter f64
newDiameter f64
speed varint



67
packet world border size
play / toClient / packet_world_border_size (0x43)

Field NameField TypeNotes
diameter f64



68
packet world border warning delay
play / toClient / packet_world_border_warning_delay (0x44)

Field NameField TypeNotes
warningTime varint



69
packet world border warning reach
play / toClient / packet_world_border_warning_reach (0x45)

Field NameField TypeNotes
warningBlocks varint



45
packet ping
play / toClient / packet_ping (0x2d)

Field NameField TypeNotes
id i32



88
packet set title subtitle
play / toClient / packet_set_title_subtitle (0x58)

Field NameField TypeNotes
text string



90
packet set title text
play / toClient / packet_set_title_text (0x5a)

Field NameField TypeNotes
text string



91
packet set title time
play / toClient / packet_set_title_time (0x5b)

Field NameField TypeNotes
fadeIn i32
stay i32
fadeOut i32



87
packet simulation distance
play / toClient / packet_simulation_distance (0x57)

Field NameField TypeNotes
distance varint



Type
packet
play / toClient / packet

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

if name
is spawn entity packet_spawn_entity
is spawn entity experience orb packet_spawn_entity_experience_orb
is named entity spawn packet_named_entity_spawn
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 chat preview packet_chat_preview
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 set cooldown packet_set_cooldown
is custom payload packet_custom_payload
is named sound effect packet_named_sound_effect
is kick disconnect packet_kick_disconnect
is entity status packet_entity_status
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 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 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 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 info packet_player_info
is face player packet_face_player
is position packet_position
is unlock recipes packet_unlock_recipes
is entity destroy packet_entity_destroy
is remove entity effect packet_remove_entity_effect
is resource pack send packet_resource_pack_send
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 held item slot packet_held_item_slot
is update view position packet_update_view_position
is update view distance packet_update_view_distance
is spawn position packet_spawn_position
is should display chat preview packet_should_display_chat_preview
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 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 stop sound packet_stop_sound
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 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



Table of Contents

KeyName
Typepacket_teleport_confirm
0x1packet_query_block_nbt
0x3packet_chat_command
0x4packet_chat_message
0x5packet_chat_preview
0x2packet_set_difficulty
0xdpacket_edit_book
0xepacket_query_entity_nbt
0x19packet_pick_item
0x22packet_name_item
0x25packet_select_trade
0x26packet_set_beacon_effect
0x28packet_update_command_block
0x29packet_update_command_block_minecart
0x2cpacket_update_structure_block
0x8packet_tab_complete
0x6packet_client_command
0x7packet_settings
0x9packet_enchant_item
0xapacket_window_click
0xbpacket_close_window
0xcpacket_custom_payload
0xfpacket_use_entity
0x10packet_generate_structure
0x11packet_keep_alive
0x12packet_lock_difficulty
0x13packet_position
0x14packet_position_look
0x15packet_look
0x16packet_flying
0x17packet_vehicle_move
0x18packet_steer_boat
0x1apacket_craft_recipe_request
0x1bpacket_abilities
0x1cpacket_block_dig
0x1dpacket_entity_action
0x1epacket_steer_vehicle
0x21packet_displayed_recipe
0x20packet_recipe_book
0x23packet_resource_pack_receive
0x27packet_held_item_slot
0x2apacket_set_creative_slot
0x2bpacket_update_jigsaw_block
0x2dpacket_update_sign
0x2epacket_arm_animation
0x2fpacket_spectate
0x30packet_block_place
0x31packet_use_item
0x24packet_advancement_tab
0x1fpacket_pong
Typepacket


0
packet teleport confirm
play / toServer / packet_teleport_confirm (0x00)

Field NameField TypeNotes
teleportId varint



1
packet query block nbt
play / toServer / packet_query_block_nbt (0x01)

Field NameField TypeNotes
transactionId varint
location position



3
packet chat command
play / toServer / packet_chat_command (0x03)

Field NameField TypeNotes
command string
timestamp i64
salt i64
argumentSignatures lengthvarint
argumentSignatures
array
argumentName string
signedPreview bool



4
packet chat message
play / toServer / packet_chat_message (0x04)

Field NameField TypeNotes
message string
timestamp i64
salt i64
signedPreview bool



5
packet chat preview
play / toServer / packet_chat_preview (0x05)

Field NameField TypeNotes
query i32
message string



2
packet set difficulty
play / toServer / packet_set_difficulty (0x02)

Field NameField TypeNotes
newDifficulty u8



13
packet edit book
play / toServer / packet_edit_book (0x0d)

Field NameField TypeNotes
hand varint
pages lengthvarint
pages
array
string
title
optional
string



14
packet query entity nbt
play / toServer / packet_query_entity_nbt (0x0e)

Field NameField TypeNotes
transactionId varint
entityId varint



25
packet pick item
play / toServer / packet_pick_item (0x19)

Field NameField TypeNotes
slot varint



34
packet name item
play / toServer / packet_name_item (0x22)

Field NameField TypeNotes
name string



37
packet select trade
play / toServer / packet_select_trade (0x25)

Field NameField TypeNotes
slot varint



38
packet set beacon effect
play / toServer / packet_set_beacon_effect (0x26)

Field NameField TypeNotes
primary effect
optional
varint
secondary effect
optional
varint



40
packet update command block
play / toServer / packet_update_command_block (0x28)

Field NameField TypeNotes
location position
command string
mode varint
flags u8



41
packet update command block minecart
play / toServer / packet_update_command_block_minecart (0x29)

Field NameField TypeNotes
entityId varint
command string
track output bool



44
packet update structure block
play / toServer / packet_update_structure_block (0x2c)

Field NameField TypeNotes
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



8
packet tab complete
play / toServer / packet_tab_complete (0x08)

Field NameField TypeNotes
transactionId varint
text string



6
packet client command
play / toServer / packet_client_command (0x06)

Field NameField TypeNotes
actionId varint



7
packet settings
play / toServer / packet_settings (0x07)

Field NameField TypeNotes
locale string
viewDistance i8
chatFlags varint
chatColors bool
skinParts u8
mainHand varint
enableTextFiltering bool
enableServerListing bool



9
packet enchant item
play / toServer / packet_enchant_item (0x09)

Field NameField TypeNotes
windowId i8
enchantment i8



10
packet window click
play / toServer / packet_window_click (0x0a)

Field NameField TypeNotes
windowId u8
stateId varint
slot i16
mouseButton i8
mode varint
changedSlots lengthvarint
changedSlots
array
location i16
item slot
cursorItem slot



11
packet close window
play / toServer / packet_close_window (0x0b)

Field NameField TypeNotes
windowId u8



12
packet custom payload
play / toServer / packet_custom_payload (0x0c)

Field NameField TypeNotes
channel string
data restBuffer



15
packet use entity
play / toServer / packet_use_entity (0x0f)

Field NameField TypeNotes
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



16
packet generate structure
play / toServer / packet_generate_structure (0x10)

Field NameField TypeNotes
location position
levels varint
keepJigsaws bool



17
packet keep alive
play / toServer / packet_keep_alive (0x11)

Field NameField TypeNotes
keepAliveId i64



18
packet lock difficulty
play / toServer / packet_lock_difficulty (0x12)

Field NameField TypeNotes
locked bool



19
packet position
play / toServer / packet_position (0x13)

Field NameField TypeNotes
x f64
y f64
z f64
onGround bool



20
packet position look
play / toServer / packet_position_look (0x14)

Field NameField TypeNotes
x f64
y f64
z f64
yaw f32
pitch f32
onGround bool



21
packet look
play / toServer / packet_look (0x15)

Field NameField TypeNotes
yaw f32
pitch f32
onGround bool



22
packet flying
play / toServer / packet_flying (0x16)

Field NameField TypeNotes
onGround bool



23
packet vehicle move
play / toServer / packet_vehicle_move (0x17)

Field NameField TypeNotes
x f64
y f64
z f64
yaw f32
pitch f32



24
packet steer boat
play / toServer / packet_steer_boat (0x18)

Field NameField TypeNotes
leftPaddle bool
rightPaddle bool



26
packet craft recipe request
play / toServer / packet_craft_recipe_request (0x1a)

Field NameField TypeNotes
windowId i8
recipe string
makeAll bool



27
packet abilities
play / toServer / packet_abilities (0x1b)

Field NameField TypeNotes
flags i8



28
packet block dig
play / toServer / packet_block_dig (0x1c)

Field NameField TypeNotes
status varint
location position
face i8
sequence varint



29
packet entity action
play / toServer / packet_entity_action (0x1d)

Field NameField TypeNotes
entityId varint
actionId varint
jumpBoost varint



30
packet steer vehicle
play / toServer / packet_steer_vehicle (0x1e)

Field NameField TypeNotes
sideways f32
forward f32
jump u8



33
packet displayed recipe
play / toServer / packet_displayed_recipe (0x21)

Field NameField TypeNotes
recipeId string



32
packet recipe book
play / toServer / packet_recipe_book (0x20)

Field NameField TypeNotes
bookId varint
bookOpen bool
filterActive bool



35
packet resource pack receive
play / toServer / packet_resource_pack_receive (0x23)

Field NameField TypeNotes
result varint



39
packet held item slot
play / toServer / packet_held_item_slot (0x27)

Field NameField TypeNotes
slotId i16



42
packet set creative slot
play / toServer / packet_set_creative_slot (0x2a)

Field NameField TypeNotes
slot i16
item slot



43
packet update jigsaw block
play / toServer / packet_update_jigsaw_block (0x2b)

Field NameField TypeNotes
location position
name string
target string
pool string
finalState string
jointType string



45
packet update sign
play / toServer / packet_update_sign (0x2d)

Field NameField TypeNotes
location position
text1 string
text2 string
text3 string
text4 string



46
packet arm animation
play / toServer / packet_arm_animation (0x2e)

Field NameField TypeNotes
hand varint



47
packet spectate
play / toServer / packet_spectate (0x2f)

Field NameField TypeNotes
target UUID



48
packet block place
play / toServer / packet_block_place (0x30)

Field NameField TypeNotes
hand varint
location position
direction varint
cursorX f32
cursorY f32
cursorZ f32
insideBlock bool
sequence varint



49
packet use item
play / toServer / packet_use_item (0x31)

Field NameField TypeNotes
hand varint
sequence varint



36
packet advancement tab
play / toServer / packet_advancement_tab (0x24)

Field NameField TypeNotes
action varint
tabId

if action
is 0 string
is 1 void



31
packet pong
play / toServer / packet_pong (0x1f)

Field NameField TypeNotes
id i32



Type
packet
play / toServer / packet

Field NameField TypeNotes
name
varint enum
0teleport confirm
1query block nbt
2set difficulty
3chat command
4chat message
5chat preview
6client command
7settings
8tab complete
9enchant item
10window click
11close window
12custom payload
13edit book
14query entity nbt
15use entity
16generate structure
17keep alive
18lock difficulty
19position
20position look
21look
22flying
23vehicle move
24steer boat
25pick item
26craft recipe request
27abilities
28block dig
29entity action
30steer vehicle
31pong
32recipe book
33displayed recipe
34name item
35resource pack receive
36advancement tab
37select trade
38set beacon effect
39held item slot
40update command block
41update command block minecart
42set creative slot
43update jigsaw block
44update structure block
45update sign
46arm animation
47spectate
48block place
49use item
params

if name
is teleport confirm packet_teleport_confirm
is query block nbt packet_query_block_nbt
is set difficulty packet_set_difficulty
is chat command packet_chat_command
is chat message packet_chat_message
is chat preview packet_chat_preview
is client command packet_client_command
is settings packet_settings
is tab complete packet_tab_complete
is enchant item packet_enchant_item
is window click packet_window_click
is close window packet_close_window
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 craft recipe request packet_craft_recipe_request
is abilities packet_abilities
is block dig packet_block_dig
is entity action packet_entity_action
is steer vehicle packet_steer_vehicle
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