Difference between revisions of "Bedrock Protocol"

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==== Structure Template Data Export Response ====
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==== Structure Template Data Response ====
  
 
Sent by the server to send data of a structure to the client in response to a [[#Structure Template Data Export Request|Structure Template Data Export Request]] packet.
 
Sent by the server to send data of a structure to the client in response to a [[#Structure Template Data Export Request|Structure Template Data Export Request]] packet.

Revision as of 14:10, 8 February 2023

Remember that this page is a WIP. Come back later to see a more complete page.
Heads up!

This article is about the protocol for the release of Minecraft Bedrock Edition (1.16.220, protocol 431). See Protocol for the Java Edition Protocol.

This is the Bedrock Edition Protocol Documentation. The Bedrock Edition Protocol uses UDP instead of TCP that is used for the Java Edition. Bedrock Edition uses RakNet as its protocol library.

The default Bedrock Edition port is 19132.

Information for this page was obtained from the NukkitX Protocol library, MiNET and gophertunnel.

Contents

Data types

Size (Bytes) Range Notes
Byte 1 0 to 255 Basically a unsigned byte
Boolean 1 0 or 1 A Byte treated as boolean, 0 is false but anything greater then that is true
Short 2 -32768 to 32767
Unsigned Short 2 0 to 65535
Int 4 -2147483648 to 2147483647 Signed little-endian 32-bit Integer
Int (big endian) 4 -2147483648 to 2147483647 Signed big-endian 32-bit Integer
Unsigned Int 4 0 to 4294967295 Unsigned 32-bit Integer
Long 8 -2^63 to 2^63-1 Signed 64-bit Integer
Unsigned Long 8 2^64-1 Unsigned 64-bit Integer
Float 4 A single-precision 32-bit IEEE 754 Floating poInt number
Double 8 A Double-precision 64-bit IEEE 754 Floating poInt number
VarInt ≥ 1
≤ 5 		0 to 4294967295
SignedVarInt ≥ 1
≤ 5 		-2147483648 and 2147483647
VarLong ≥ 1
≤ 10
SignedVarLong ≥ 1
≤ 10 		-2^63 and 2^63-1
String UTF-8 String prefixed with its size in Bytes as a VarInt. This has the same data structure as a ByteArray but it contains textual data.
Vector3 12 Three Float values (X, Y and Z respectively)
Vector2 8 Two Float values (X and Y respectively)
NBT
ByteArray An arbitrary array of Bytes prefixed with its size in Bytes as a VarInt.
BlockCoordinates ≥ 3
≤ 15 		A SignedVarInt, a normal VarInt and another SignedVarInt (X, Y and Z respectively)
PlayerLocation 15 Three Float values (X, Y and Z respectively), followed by three Bytes (pitch, head yaw and yaw respectively). To convert the Bytes to normal pitch and yaw values divide them by 0.71
UUID 16 A UUID Encoded as two unsigned 64-bit Integers: the most significant 64 bits and the least significant 64 bits

Packet Format

Bedrock Edition uses RakNet as its protocol library, so the packets are sent that way. The UDP protocol specifies packet length, so unlike Java Edition and TCP which deal with raw data streams packets are not length-prefixed. Packets seem to always use compression and can also use encryption. Multiple packets can also be batched into a single packet. Packet compression uses zlib, and it seems that packet data can be fed directly into zlib (after being decrypted if encryption is enabled).

Refer to gophertunnel for more information.

Login process

The login process is as follows:

  1. C→S: Login
  2. S→C: Server To Client Handshake
  3. C→S: Client To Server Handshake
  4. S→C: Play Status (Login success)

To spawn, the following packets should be sent, in order, after the ones above:

  1. S→C: Resource Packs Info
  2. C→S: Resource Pack Client Response
  3. S→C: Resource Pack Stack
  4. C→S: Resource Pack Client Response
  5. S→C: Start Game
  6. S→C: Creative Content
  7. S→C: Biome Definition List
  8. S→C: Level Chunk
  9. S→C: Play Status (Player spawn)

If there are no resource packs being sent, a Resource Pack Stack can be sent directly after Resource Packs Info to avoid the client responses.

Packets

Please note that some packet ids are missing, so they don't line up. The following packet ids are missing: 0x10, 0x74, 0x7F, 0x80 (16, 116, 127, 128)


Login

Sent when the client initially tries to join the server. It is the first packet sent and contains information specific to the player.

Packet ID Bound To Field Name Field Type Notes
0x01 Server Protocol version Int (big-endian)
Chain data JSON array of JWT Data Contains the display name, UUID and XUID
Skin data JWT Data


Play Status

Packet ID Bound To Field Name Field Type Notes
0x02 Client Status Int (big-endian) The current status of the connection.

The values for each status are as follows:

Status Name Notes
0 Login success Sent after Login has been successfully decoded and the player has logged in
1 Failed client Displays "Could not connect: Outdated client!"
2 Failed server Displays "Could not connect: Outdated server!"
3 Player spawn Sent after world data to spawn the player
4 Failed invalid Tenant Displays "Unable to connect to world. Your school does not have access to this server."
5 Failed Vanilla Edu. Displays "The server is not running Minecraft: Education Edition. Failed to connect."
6 Failed incompatible Displays "The server is running an incompatible edition of Minecraft. Failed to connect."
7 Failed server full Displays "Wow this server is popular! Check back later to see if space opens up. Server Full"

Server To Client Handshake

Packet ID Bound To Field Name Field Type Notes
0x03 Client JWT data JWT String Contains the salt to complete the Diffie-Hellman key exchange


Client To Server Handshake

Sent by the client in response to a Server To Client Handshake packet sent by the server. It is the first encrypted packet in the login handshake and serves as a confirmation that encryption is correctly initialized client side. It has no fields.

Packet ID Bound To Field Name Field Type Notes
0x04 Server This packet has no data.

Disconnect

Sent by the server to disconnect a client.

Packet ID Bound To Field Name Field Type Notes
0x05 Client Hide disconnect screen Boolean Specifies if the disconnection screen should be hidden when the client is disconnected, meaning it will be sent directly to the main menu.
Kick message String An optional message to show when disconnected.


Resource Packs Info

Packet ID Bound To Field Name Field Type Notes
0x06 Client Forced to Accept Boolean If the resource pack requires the client accept it.
Scripting Enabled Boolean If scripting is enabled.
BehahaviorPackInfos ResourcePackInfo[] A list of behaviour packs that the client needs to download before joining the server. All of these behaviour packs will be applied together.
ResourcePackInfos ResourcePackInfo[] A list of resource packs that the client needs to download before joining the server. The order of these resource packs is not relevant in this packet. It is however important in the Resource Pack Stack packet.

Resource Pack Stack

Packet ID Bound To Field Name Field Type Notes
0x07 Client Forced to Accept Boolean If the resource pack must be accepted for the player to join the server.
Resource Pack Entry Field Name
Array Pack ID String The ID of the resource pack.
Pack Version String The version of the resource pack.
Subpack Name String The subpack name of the resource pack.
Behavior Pack Entry Field Name
Array Pack ID String The ID of the resource pack.
Pack Version String The version of the resource pack.
Subpack Name String The subpack name of the resource pack.
Experimental Boolean If the sent resource and behavior packs are experimental.
Game Version String The version of the game the sent resource and behavior packs were made for.


Resource Pack Client Response

Packet ID Bound To Field Name Field Type Notes
0x08 Server Status Byte See below
Pack IDs ResourcePackIds All of the pack IDs.

The values for each status are as follows:

Status Name Notes
0 None
1 Refused
2 Send packs
3 Have all packs
4 Completed

Text

Sent by the client to the server to send chat messages, and by the server to the client to forward or send messages, which may be chat, popups, tips etc.

Packet ID Bound To Field Name Field Type Notes
0x09 Server & Client Type Byte The type of chat message sent.
Needs Translation Boolean If the message sent is a translation key and needs to be translated.
Chat Type ID Text Derived from above; values sent here change depending on that.
0, 1, or 2 Source Name String The name of the source.
3, 4, or 5 Message String The message sent with the packet.
6, 7, or 8 Message String The message sent with the packet
Parameters Array The parameters sent with the packet. This usually includes translation parameters or similar types depending on what kind of chat type was sent.
XUID Optional String The XUID of the player who sent this message.
Platform Chat ID Optional String The platform chat ID of the sent message.
ID Chat Type
0 Raw
1 Chat
2 Translation
3 Popup
4 Jukebox Popup
5 Tip
6 System
7 Whisper
8 Announcement
9 Object
10 Object Whisper

For additional information and examples of all the chat types above, see here: https://imgur.com/a/KhcFscg


Set Time

Sent by the server to update the current time client-side. The client actually advances time client-side by itself, so this packet does not need to be sent each tick. It is merely a means of synchronizing time between server and client.

Packet ID Bound To Field Name Field Type Notes
0x0A Client Time SignedVarInt Time is the current time. The time is not limited to 24000 (time of day), but continues progressing after that.


Start Game

Sent by the server to send information about the world the player will be spawned in.

Packet ID Bound To Field Name Field Type Notes
0x0B Client Entity ID Self SignedVarLong The unique ID of the player. The unique ID is a value that remains consistent across different sessions of the same world, but most unofficial servers simply fill the runtime ID of the entity out for this field.
Runtime Entity ID VarLong The runtime ID of the player. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Player Gamemode SignedVarInt
Spawn Vector3 The spawn position of the player in the world. In servers this is often the same as the world's spawn position found below.
Rotation Vector2 The pitch and yaw of the player
Seed SignedVarInt The seed used to generate the world. Unlike in Java edition, the seed is a 32bit Integer here.
Spawn Biome Type Short
Custom Biome Name String
Dimension SignedVarInt Dimension is the ID of the dimension that the player spawns in. It is a value from 0-2, with 0 being the overworld, 1 being the nether and 2 being the end.
Generator SignedVarInt Generator is the generator used for the world. It is a value from 0-4, with 0 being old limited worlds, 1 being infinite worlds, 2 being flat worlds, 3 being nether worlds and 4 being end worlds. A value of 0 will actually make the client stop rendering chunks you send beyond the world limit.
World Gamemode SignedVarInt The game mode that a player gets when it first spawns in the world. It is shown in the settings and is used if the Player Gamemode is set to 5.
Difficulty SignedVarInt Difficulty is the difficulty of the world. It is a value from 0-3, with 0 being peaceful, 1 being easy, 2 being normal and 3 being hard.
World Spawn BlockCoordinates The block on which the world spawn of the world. This coordinate has no effect on the place that the client spawns, but it does have an effect on the direction that a compass poInts.
Has achievements disabled Boolean Defines if achievements are disabled in the world. The client crashes if this value is set to true while the player's or the world's game mode is creative, and it's recommended to simply always set this to false as a server.
Day cycle stop time SignedVarInt The time at which the day cycle was locked if the day cycle is disabled using the respective game rule. The client will maIntain this time as Boolean as the day cycle is disabled.
EDU offer SignedVarInt Some Minecraft: Education Edition field that specifies what 'region' the world was from, with 0 being None, 1 being RestOfWorld, and 2 being China. The actual use of this field is unknown.
Has Education Edition features enabled Boolean Specifies if the world has education edition features enabled, such as the blocks or entities specific to education edition.
Education Production ID String
Rain level Float The level specifying the Intensity of the rain falling. When set to 0, no rain falls at all.
Lightning level Float The level specifying the Intensity of the thunder. This may actually be set independently from the rain level, meaning dark clouds can be produced without rain.
Has Confirmed Platform Locked Content Boolean
Is Multiplayer Boolean Specifies if the world is a multi-player game. This should always be set to true for servers.
Broadcast To LAN Boolean Specifies if LAN broadcast was Intended to be enabled for the world.
Xbox Live Broadcast Mode VarInt The mode used to broadcast the joined game across XBOX Live.
Platform Broadcast Mode VarInt The mode used to broadcast the joined game across the platform.
Enable commands Boolean If commands are enabled for the player. It is recommended to always set this to true on the server, as setting it to false means the player cannot, under any circumstance, use a command.
Are texture packs required Boolean Specifies if the texture pack the world might hold is required, meaning the client was forced to download it before joining.
GameRules GameRules Defines game rules currently active with their respective values. The value of these game rules may be either 'bool', 'Int32' or 'Float32'. Some game rules are server side only, and don't necessarily need to be sent to the client.
Bonus Chest Boolean Specifies if the world had the bonus map setting enabled when generating it. It does not have any effect client-side.
Map Enabled Boolean Specifies if the world has the start with map setting enabled, meaning each joining player obtains a map. This should always be set to false, because the client obtains a map all on its own accord if this is set to true.
Permission Level SignedVarInt The permission level of the player. It is a value from 0-3, with 0 being visitor, 1 being member, 2 being operator and 3 being custom.
Server Chunk Tick Range Int The radius around the player in which chunks are ticked. Most servers set this value to a fixed number, as it does not necessarily affect anything client-side.
Has Locked Behavior Pack Boolean Specifies if the texture pack of the world is locked, meaning it cannot be disabled from the world. This is typically set for worlds on the marketplace that have a dedicated texture pack.
Has Locked Resource Pack Boolean Specifies if the texture pack of the world is locked, meaning it cannot be disabled from the world. This is typically set for worlds on the marketplace that have a dedicated texture pack.
Is From Locked World Template Boolean Specifies if the world from the server was from a locked world template. For servers this should always be set to false.
Use MSA Gamertags Only Boolean
Is From World Template Boolean Specifies if the world from the server was from a locked world template. For servers this should always be set to false.
Is World Template Option Locked Boolean Specifies if the world was a template that locks all settings that change properties above in the settings GUI. It is recommended to set this to true for servers that do not allow things such as setting game rules through the GUI.
Only Spawn V1 Villagers Boolean A hack that Mojang put in place to preserve backwards compatibility with old villagers. The his never actually read though, so it has no functionality.
Game Version String The version of the game from which Vanilla features will be used. The exact function of this field isn't clear.
Limited World Width Int
Limited World Height Int
Is Nether Type Boolean
Is Force Experimental Gameplay Boolean
Level ID String A base64 encoded world ID that is used to identify the world.
World name String The name of the world that the player is joining. Note that this field shows up above the player list for the rest of the game session, and cannot be changed. Setting the server name to this field is recommended.
Premium World Template Id String A UUID specific to the premium world template that might have been used to generate the world. Servers should always fill out an empty String for this.
Is Trial Boolean Specifies if the world was a trial world, meaning features are limited and there is a time limit on the world.
Movement type VarInt Specifies the movement type as an ordinal - client authoritative (MovePlayerPacket), server authoritative (PlayerAuthInputPacket), or server authoritative with rewind
Movement rewind size Int Always present, but only relevant if the movement type is server authoritative with rewind.
Server authoritative block breaking Boolean
Current Tick Long LE The total time in ticks that has elapsed since the start of the world.
Enchantment Seed SignedVarInt The seed used to seed the random used to produce enchantments in the enchantment table. Note that the exact correct random implementation must be used to produce the correct results both client- and server-side.
Block Properties Block Properties An array of string followed by tag for each custom block on the server.
Itemstates Itemstates A list of all items with their legacy IDs which are available in the game. Failing to send any of the items that are in the game will crash mobile clients. Each entry in the array consists of a string, followed by a Little Endian Short ID, followed by a boolean if the item is component based
Multiplayer Correlation ID String A unique ID specifying the multi-player session of the player. A random UUID should be filled out for this field.
Inventories server authoritative Boolean If true, the ItemStackRequestPacket is used to send inventory transactions. Otherwise, the InventoryTransactionPacket is used.

In order to use custom blocks, you must add data_driven_items as an ExperimentData in this packet with its value set to true [whether you need to add the experiment data to the resource pack process, like with items, has been untested]. A boilerplate representation of the NBT sent for a custom block is as follows: 

{
  "components": {
    "minecraft:entity_collision": {
      "enabled": 0b,
      "origin": [
        -8.0f,
        0.0f,
        -8.0f
      ],
      "size": [
        16.0f,
        16.0f,
        16.0f
      ]
    },
    "minecraft:material_instances": {
      "mappings": {},
      "materials": {
        "*": {
          "ambient_occlusion": 1b,
          "face_dimming": 1b,
          "render_method": "opaque",
          "texture": "snow"
        }
      }
    },
    "minecraft:unit_cube": {}
  }
}

The block runtime ID is determined by the second part of the namespace, in alphabetical order. If the block is named wikivg:aaa, it will be placed at the beginning of the block runtime states. If the block is named wikivg:zzz, it will be placed at the end of the palette [most likely - naming a block "snow" caused other block states to shift].

Add Player

Sent by the server to make a player entity show up client-side. It is one of the few entities that cannot be sent using the Add Entity packet.

Packet ID Bound To Field Name Field Type Notes
0x0C Client UUID UUID UUID is the UUID of the player. It is the same UUID that the client sent in the Login packet at the start of the session. A player with this UUID must exist in the player list (built up using the Player List packet) for it to show up in-game.
Username String Username is the name of the player. This username is the username that will be set as the initial name tag of the player.
Entity ID Self SignedVarLong The unique ID of the player. The unique ID is a value that remains consistent across different sessions of the same world, but most unoffical servers simply fill the runtime ID of the player out for this field.
Runtime Entity ID VarLong The runtime ID of the player. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Platform Chat ID String An identifier only set for particular platforms when chatting (presumably only for Nintendo Switch). It is otherwise an empty string, and is used to decide which players are able to chat with each other.
Position Vector3 The position to spawn the player at. If the player is at a distance that the viewer cannot see, the player will still show up if the viewer moves closer.
Velocity Vector3 The initial velocity the player spawns with. This velocity will initiate client side movement of the player.
Rotation Float Pitch, yaw and head yaw
Held Item Item The item that the player is holding. The item is shown to the viewer as soon as the player itself shows up. Needless to say that this field is rather pointless, as additional packets still must be sent for armour to show up.
Metadata MetadataDictionary A map of entity metadata, which includes flags and data properties that alter in particular the way the player looks. Flags include ones such as 'on fire' and 'sprinting'. The metadata values are indexed by their property key.
Flags VarInt Flags is a set of flags that specify certain properties of the player, such as whether or not it can fly and/or move through blocks.
Command permission VarInt A set of permissions that specify what commands a player is allowed to execute.
Action Permissions VarInt Action Permissions is, much like Flags, a set of flags that specify actions that the player is allowed to undertake, such as whether it is allowed to edit blocks, open doors etc.
Permission Level VarInt The permission level of the player as it shows up in the player list built up using the PlayerList packet.
Custom stored permissions VarInt
User Id Long A unique identifier of the player. It appears it is not required to fill this field out with a correct value. Simply writing 0 seems to work.
Links Links A list of entity links that are currently active on the player. These links alter the way the player shows up when first spawned in terms of it shown as riding an entity. Setting these links is important for new viewers to see the player is riding another entity.
Device ID String The device ID set in one of the files found in the storage of the device of the player. It may be changed freely, so it should not be relied on for anything.
Device OS Int The build platform/device OS of the player that is about to be added, as it sent in the Login packet when joining.


Add Entity

Sent by the server to spawn an entity to the player. It is used for every entity except other players, paintings and items, for which the Add Player, Add Painting and Add Item Entity packets are used.

Packet ID Bound To Field Name Field Type Notes
0x0D Client Entity ID Self SignedVarLong The unique ID of the entity. The unique ID is a value that remains consistent across different sessions of the same world, but most unofficial servers simply fill the runtime ID of the entity out for this field.
Runtime Entity ID VarLong The runtime ID of the entity. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Entity Type String The string entity type of the entity, for example 'minecraft:skeleton'.
Position Vector3 The position to spawn the entity at. If the entity is at a distance that the player cannot see, the entity will still show up if the player moves closer.
Velocity Vector3 The initial velocity the entity spawns with. This velocity will initiate client side movement of the entity.
Rotation Vector3 Pitch, yaw and head yaw
Attributes EntityAttributes A slice of attributes that the entity has. It includes attributes such as its health, movement speed, etc.
Metadata MetadataDictionary A map of entity metadata, which includes flags and data properties that alter in particular the way the entity looks. Flags include ones such as 'on fire' and 'sprinting'. The metadata values are indexed by their property key.
Links Links A list of entity links that are currently active on the entity. These links alter the way the entity shows up when first spawned in terms of it shown as riding an entity. Setting these links is important for new viewers to see the entity is riding another entity.


Remove Entity

Sent by the server to remove an entity that currently exists in the world from the client-side. Sending this packet if the client cannot already see this entity will have no effect.

Packet ID Bound To Field Name Field Type Notes
0x0E Client Unique Entity Id SignedVarLong The unique ID of the entity to be removed. The unique ID is a value that remains consistent across different sessions of the same world, but most unofficial servers simply fill the runtime ID of the entity out for this field.


Add Item Entity

Sent by the server to make an item entity show up. It is one of the few entities that cannot be sent using the Add Entity packet.

Packet ID Bound To Field Name Field Type Notes
0x0F Client Entity ID Self SignedVarLong The unique ID of the entity. The unique ID is a value that remains consistent across different sessions of the same world, but most unofficial servers simply fill the runtime ID of the entity out for this field.
Runtime Entity ID VarLong The runtime ID of the entity. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Item Item The item that is spawned. It must have a valid ID for it to show up client-side. If it is not a valid item, the client will crash when coming near.
Position Vector3 The position to spawn the entity on. If the entity is at a distance that the player cannot see, the entity will still show up if the player moves closer.
Velocity Vector3 The initial velocity the entity spawns with. This velocity will initiate client side movement of the entity.
Metadata MetadataDictionary A map of entity metadata, which includes flags and data properties that alter in particular the way the entity looks. Flags include ones such as 'on fire' and 'sprinting'. The metadata values are indexed by their property key.
Is From Fishing Boolean Specifies if the item was obtained by fishing it up using a fishing rod. It is not clear why the client needs to know this.


Take Item Entity

Sent by the server when a player picks up an item entity. It makes the item entity disappear to viewers and shows the pick-up animation.

Packet ID Bound To Field Name Field Type Notes
0x11 Client Item Runtime Entity Id VarLong the entity runtime ID of the item that is being taken by another entity. It will disappear to viewers after showing the pick-up animation.
Runtime Entity Id VarLong The runtime ID of the entity that took the item, which is usually a player, but could be another entity like a zombie too.


Move Entity Absolute

Sent by the server to move an entity to an absolute position. It is typically used for movements where high accuracy isn't needed, such as for long range teleporting. This packet is also sent by the client when riding a horse/donkey.

Packet ID Bound To Field Name Field Type Notes
0x12 Server & Client Runtime entity id VarLong The runtime ID of the entity. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Flags byte A combination of flags that specify details of the movement. See below for more info.
Position PlayerLocation
Field Bit Notes
On ground 0x01 If the entity is touching the ground
Telported 0x02


Move Player

Sent by players to send their movement to the server, and by the server to update the movement of player entities to other players.

Packet ID Bound To Field Name Field Type Notes
0x13 Server & Client Runtime entity id VarLong The runtime ID of the player. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Position Vector3
Rotation Vector3 Pitch, yaw and head yaw
Mode Byte
On ground Boolean Specifies if the player is considered on the ground. Note that proxies or hacked clients could fake this to always be true, so it should not be taken for granted.
Riding runtime entity id Float The runtime ID of the entity that the player might currently be riding. If not riding, this should be left 0.
Teleportation cause VarLong See below. Only needs to exist if Mode cause is 2 (teleport).
Entity type Byte Only needs to exist if Mode cause is 2 (teleport).

Modes:

ID Mode
0 Normal
1 Reset
2 Teleport
3 Rotation

Teleportation causes:

ID Cause
0 Unknown
1 Projectile
2 Chorus fruit
3 Command
4 Behavior


Rider Jump

Sent by the client when it jumps while riding an entity that has the WASDControlled entity flag set, for example when riding a horse. According to MiNET this can also be sent from the server to the client, but details on this are unknown.

Packet ID Bound To Field Name Field Type Notes
0x14 Server & Client Jump Strength SignedVarInt The strength of the jump, depending on how long the rider has held the jump button.


Update Block

Sent by the server to update a block client-side, without resending the entire chunk that the block is located in. It is particularly useful for small modifications like block breaking/placing.

Packet ID Bound To Field Name Field Type Notes
0x15 Client Coordinates BlockCoordinates The block position at which a block is updated.
Block Runtime ID VarInt The runtime ID of the block that is placed at Position after sending the packet to the client. The runtime ID must point to a block sent in the list in the Start Game packet.
Flags VarInt See below. Flags is a combination of flags that specify the way the block is updated client-side. It is a combination of the flags below, but typically sending only the Network flag is sufficient.
Layer VarInt The world layer on which the block is updated. In Bedrock, multiple blocks can be put in the same location using layers. The second layer is usually used for liquids, so blocks can be inside a liquid. For most blocks, this is the first layer, as that layer is the default layer to place blocks on, but for blocks inside of each other, this differs. As this system is designed with liquids, there may be bugs when using this to place blocks inside each other. For example, placing an interactable block such as an item frame on the second layer can cause a game crash if the player tries to interact with it.
Field Bit Notes
Neighbors 0x01
Network 0x02
No Graphic 0x04
Priority 0x08


Add Painting

Packet ID Bound To Field Name Field Type Notes
0x16 Client Unique Entity Id SignedVarLong The unique ID of the entity. The unique ID is a value that remains consistent across different sessions of the same world, but most unofficial servers simply fill the runtime ID of the entity out for this field.
Runtime Entity Id VarLong The runtime ID of the entity. The runtime ID is unique for each world session, and entities are generally identified in packets using this runtime ID.
Position Vector3 The position to spawn the entity at. If the entity is at a distance that the player cannot see, the entity will still show up if the player moves closer.
Direction SignedVarInt The facing direction of the painting. See below.
Name String This is the name of the painting (e.g. BurningSkull). See below.

Valid facing values:

  • 0 - Facing towards positive Z (south)
  • 1 - Facing towards negative X (west)
  • 2 - Facing towards negative Z (north)
  • 3 - Facing towards positive X (east)

Valid name values:

  • Kebab
  • Aztec
  • Alban
  • Aztec
  • Aztec2
  • Bomb
  • Plant
  • Wasteland
  • Wanderer
  • Graham
  • Pool
  • Courbet
  • Sunset
  • Sea
  • Creebet
  • Match
  • Bust
  • Stage
  • Void
  • SkullAndRoses
  • Wither
  • Fighters
  • Skeleton
  • DonkeyKong
  • PoInter
  • Pigscene
  • BurningSkull


Tick Sync

Sent by the client and the server to maintain a synchronized, server-authoritative tick between the client and the server. The client sends this packet first, and the server should reply with another one of these packets, including the response time.

Packet ID Bound To Field Name Field Type Notes
0x17 Server & Client Request Timestamp Long
Response Timestamp Long


Level Sound Event (1)

Packet ID Bound To Field Name Field Type Notes
0x18 Server & Client Sound ID Byte
Position Vector3
Block Id SignedVarInt
Entity Type SignedVarInt
Is baby mob Boolean
Is global Boolean


Level Event

Packet ID Bound To Field Name Field Type Notes
0x19 Client Event ID SignedVarInt
Position Vector3
Data SignedVarInt


Block Event

Packet ID Bound To Field Name Field Type Notes
0x1A Client Block Position BlockCoordinates
Event Type SignedVarInt
Event Data SignedVarInt


Entity Event

Packet ID Bound To Field Name Field Type Notes
0x1B Server & Client Runtime Entity ID VarLong
Event ID Byte See Bedrock Protocol/Entity Events
Data SignedVarInt


Mob Effect

Packet ID Bound To Field Name Field Type Notes
0x1C Client Runtime entity id VarLong
Event Byte
Effect id SignedVarInt See the Bedrock Edition section of Status effect#Effect_IDs
Amplifier SignedVarInt
Particles Boolean If true, effect particles are not shown
Duration SignedVarInt

Events:

  • 0: None
  • 1: Add
  • 2: Modify
  • 3: Remove

Update Attributes

Packet ID Bound To Field Name Field Type Notes
0x1D Client Runtime Entity ID VarLong
Attributes PlayerAttributes


Inventory Transaction

Packet ID Bound To Field Name Field Type Notes
0x1E Server & Client Transaction Transaction


Mob Equipment

Packet ID Bound To Field Name Field Type Notes
0x1F Server & Client Runtime Entity ID VarLong
Item Item
Slot Byte
Selected Slot Byte
Windows Id Byte


Mob Armor Equipment

Packet ID Bound To Field Name Field Type Notes
0x20 Server & Client Runtime Entity ID VarLong
Helmet Item
Chestplate Item
Leggings Item
Boots Item


Interact

Packet ID Bound To Field Name Field Type Notes
0x21 Server & Client Action ID Byte
Target Runtime Entity ID VarLong


Block Pick Request

Packet ID Bound To Field Name Field Type Notes
0x22 Server Block Position X SignedVarInt
Block Position Y SignedVarInt
Block Position Z SignedVarInt
Add User Data bool Whether there should be NBT data in the picked block (activated by pressing Ctrl on default keyboard controls)
Hotbar Slot Byte

The Bedrock client sends the position of the block. It expects the server to decide the block to pick and add it to the inventory or switch the hotbar slot if needed.


Entity Pick Request

Packet ID Bound To Field Name Field Type Notes
0x23 Server Runtime Entity ID Unsigned Long
Hotbar Slot Byte The held hotbar slot of the player at the time of trying to pick the entity. If empty, the resulting spawn egg will be put into this slot.


Player Action

Packet ID Bound To Field Name Field Type Notes
0x24 Server Runtime Entity ID VarLong
Action ID SignedVarInt
Coordinates BlockCoordinates
Face SignedVarInt


Entity Fall

Sent by the client when it falls from a distance onto a block that would damage the player.

This packet should not be used at all by the server, as it can easily be spoofed using a proxy or custom client. Servers should implement fall damage using their own calculations.

Packet ID Bound To Field Name Field Type Notes
0x25 Server Runtime Entity Id VarLong
Fall Distance Float The distance that the entity fell until it hit the ground. The damage would otherwise be calculated using this field.
In Void Boolean Specifies if the fall was in the void. The player can't fall below roughly Y=-40.


Hurt Armor

Sent by the server to damage the player's armor after being hit.

The packet should never be used by servers as it hands the responsibility over to the player completely, while the server can easily and reliably update the armor damage of players itself.

Packet ID Bound To Field Name Field Type Notes
0x26 Client Health SignedVarInt


Set Entity Data

Packet ID Bound To Field Name Field Type Notes
0x27 Server & Client Runtime Entity ID VarLong
Metadata MetadataDictionary


Set Entity Motion

Packet ID Bound To Field Name Field Type Notes
0x28 Server & Client Runtime Entity Id VarLong
Motion X Vector3
Motion Y Float
Motion Z Float


Set Entity Link

Packet ID Bound To Field Name Field Type Notes
0x29 Client Ridden ID SignedVarLong
Rider ID SignedVarLong
Link Type Byte
Unknown Byte


Set Health

Sent by the server to set the health of the player it is sent to.

This packet should no longer be used. Instead, the health attribute should be used so that the health and maximum health may be changed directly.

Packet ID Bound To Field Name Field Type Notes
0x2A Client Health SignedVarInt


Set Spawn Position

Packet ID Bound To Field Name Field Type Notes
0x2B Client Spawn Type SignedVarInt
Block Position BlockCoordinates the new position of the spawn that was set. If spawnType is WORLD_SPAWN, compasses will point to this position. As of 1.16, blockPosition is always the position of the player.
Dimension ID Int
Spawn Position Vector3 Default -2147483648, -2147483648, -2147483648
Forced Boolean


Animate

Sent by the server to send a player animation from one player to all viewers of that player.

Packet ID Bound To Field Name Field Type Notes
0x2C Server & Client Action ID SignedVarInt
Runtime Entity ID VarLong


Respawn

Packet ID Bound To Field Name Field Type Notes
0x2D Server & Client Position Vector3
State Byte
Runtime Entity ID VarLong

States:

ID Name
0 Server Searching
1 Server Ready
2 Client Ready

Container Open

Packet ID Bound To Field Name Field Type Notes
0x2E Client Window Id Byte
Type Byte
Block Position BlockCoordinates
Unique Entity Id SignedVarLong

Bedrock needs either a valid block position, with an actual block at that position, or an entity ID for this to work. The entity must have CONTAINER_BASE_SIZE metadata, or the block must be a container. The entity ID is used for minecart chests etc. but any entity will work. If the entity has NAMETAG metadata this will be used as the container name.


Container Close

Packet ID Bound To Field Name Field Type Notes
0x2F Server & Client Window Id Byte


Player Hotbar

Packet ID Bound To Field Name Field Type Notes
0x30 Server & Client Selected Hotbar Slot VarInt
Container Id Byte
Select Hotbar Slot Boolean


Inventory Content

Packet ID Bound To Field Name Field Type Notes
0x31 Server & Client Inventory Id VarInt
Input ItemStacks


Inventory Slot

Packet ID Bound To Field Name Field Type Notes
0x32 Server & Client Inventory Id VarInt
Slot VarInt
Item Item


Container Set Data

Packet ID Bound To Field Name Field Type Notes
0x33 Client Window Id Byte
Property SignedVarInt
Value SignedVarInt


Crafting Data

Since 1.16.200, each recipe must have a unique network ID. Otherwise, the client will crash.

Packet ID Bound To Field Name Field Type Notes
0x34 Client Recipes Recipes
Potion type recipes PotionTypeRecipe[]
potion container recipes PotionContainerChangeRecipe[]
Is Clean Boolean

Crafting Event

Packet ID Bound To Field Name Field Type Notes
0x35 Server & Client Window ID Byte
Recipe Type SignedVarInt
Recipe ID UUID
Input ItemStacks
Result ItemStacks


GUI Data Pick Item

Packet ID Bound To Field Name Field Type Notes
0x36 Client
Item name String The name of the item that shows up in the top part of the popup that shows up when selecting an item. It is shown as if an item was selected by the player itself.
Item effects String The line under the Item name, where the effects of the item are usually situated.
Hotbar Slot int The hot bar slot to be selected/picked. This does not currently work, so it does not matter what number this is.

Sent by the server to make the client 'select' a hotbar slot. It currently appears to be broken however, and does not actually set the selected slot to the hotbar slot set in the packet.


Adventure Settings

Sent by the server to update gameplay related features, in particular permissions to access these features for the client.

It includes allowing the player to fly, build, and mine and attack entities. Most of these flags should be checked server-side instead of using this packet only.

The client my also send this packet to the server when it updates one of these settings through the in-game settings interface. The server should verify if the player actually has permission to update these settings.

Packet ID Bound To Field Name Field Type Notes
0x37 Server & Client Flags VarInt
Command permission VarInt
Action permissions VarInt
Permission level VarInt
Custom stored permissions VarInt
User Id Boolean


Block Entity Data

Packet ID Bound To Field Name Field Type Notes
0x38 Server & Client Coordinates BlockCoordinates
NamedTag NBT


Player Input

Sent by the client when the player is moving but the server does not allow it to update its movement using the Move Player packet. It includes situations where the player is riding an entity like a boat. If this is the case, the packet is sent roughly every tick.

Packet ID Bound To Field Name Field Type Notes
0x39 Server Movement Vec2 The movement vector of the input. It should be thought of in Pocket Edition controls, where specific arrows (or a combination of two, resulting in a diagonal arrow) decide the direction of movement. The movement vector typically has a length of 1: Either it has movement on one axis, or it has a combination, resulting in sqrt(2)/2 for both axes.
Jumping Boolean Indicates if the player was pressing the jump button or not. It does not define if the player was actually in the air or not.
Sneaking Boolean Indicates the player was sneaking during the input. Note that this may also be checked by keeping the sneaking state updated using the Player Action packet


Level Chunk

Packet ID Bound To Field Name Field Type Notes
0x3A Client Chunk X SignedVarInt
Chunk Z SignedVarInt
Sub Chunk Count VarInt
Cache Enabled Boolean
Chunk Data ByteArray


Set Commands Enabled

This packet is sent to the client to enable or disable the ability to execute commands. If disabled, the client itself will stop the execution of commands.

Packet ID Bound To Field Name Field Type Notes
0x3B Client Commands enabled Boolean


Set Difficulty

Sent by the server to update the client-side difficulty pf the client. The actual effect of this packet on the client isn't very significant, as the difficulty is handled server-side.

Packet ID Bound To Field Name Field Type Notes
0x3C Client Difficulty VarInt


Change Dimension

Packet ID Bound To Field Name Field Type Notes
0x3D Client Dimension SignedVarInt
Position X Vector3
Position Y Boolean
Position Z Float
Respawn Boolean


Set Player Game Type

Packet ID Bound To Field Name Field Type Notes
0x3E Server & Client Game mode SignedVarInt


Player List

Packet ID Bound To Field Name Field Type Notes
0x3F Client Records PlayerRecords


Simple Event

Packet ID Bound To Field Name Field Type Notes
0x40 Client Event Type Unsigned Short


Event

Packet ID Bound To Field Name Field Type Notes
0x41 Client Runtime Entity ID VarLong
Event data SignedVarInt
Event type Byte


Spawn Experience Orb

Sent by the server to spawn an experience orb entity client-side.

Packet ID Bound To Field Name Field Type Notes
0x42 Client Position Vector3
Count SignedVarInt


Map Item Data

Sent by the server to update the data of a map shown to the client. It is sent with a combination of flags that specify what data is updated.

The packet may be used to update specific parts of the map only. It is not required to send the entire map each time when updating one part.

TODO

Packet ID Bound To Field Name Field Type Notes
0x43 Client Map ID VarLong The unique identifier that represents the map that is updated over network. It remains consitent across sesions.


Map Info Request

Sent by the client to request the server to deliver information of a certain map in the inventory of the player. The serve should respond with a Map Item Data packet.

Packet ID Bound To Field Name Field Type Notes
0x44 Server & Client Unique Map Id SignedVarLong


Request Chunk Radius

Sent by the client to update the server on the chunk view radius that it has set in the settings. The server may respond with a Chunk Radius Updated packet with either the radius requested, or a different chunk radius if the server chooses so.

Packet ID Bound To Field Name Field Type Notes
0x45 Server & Client Chunk radius SignedVarInt


Chunk Radius Updated

Sent by the server in response to a Request Chunk Radius packet. It defines the radius that the server allows the client to have. This may be lower than the chunk radius requested by the client.

Packet ID Bound To Field Name Field Type Notes
0x46 Client Chunk radius SignedVarInt


ItemFrame Drop Item

Sent by the client in creative mode when it wants to remove an item from an item frame. For survival mode, the player action types of START_BREAK and ABORT_BREAK are instead sent.

Packet ID Bound To Field Name Field Type Notes
0x47 Server & Client Block Position BlockCoordinates

Game Rules Changed

Packet ID Bound To Field Name Field Type Notes
0x48 Client Rules GameRules


Camera

Packet ID Bound To Field Name Field Type Notes
0x49 Client Camera Unique Entity Id SignedVarLong
Player Unique Entity Id SignedVarLong


Boss Event

Packet ID Bound To Field Name Field Type Notes
0x4A Client Boss Entity ID SignedVarLong
Event Type VarInt


Show Credits

Sent by the server to show the Minecraft credits screen to the client. It is typically when the player beats the ender dragon and leaves the End.

Packet ID Bound To Field Name Field Type Notes
0x4B Client Runtime Entity ID VarLong
Status SignedVarInt

Statuses:

ID Name
0 Start Credits
1 End Credits


Available Commands

Packet ID Bound To Field Name Field Type Notes
0x4C Client


Command Request

Packet ID Bound To Field Name Field Type Notes
0x4D Server Command String
Command type VarInt
Unknown UUID UUID
Request ID String
Unknown Boolean


CommandBlock Update

Packet ID Bound To Field Name Field Type Notes
0x4E Server Is Block Boolean


Command Output

Packet ID Bound To Field Name Field Type Notes
0x4F Client


Update Trade

Packet ID Bound To Field Name Field Type Notes
0x50 Client Window ID Byte
Window Type Byte
Unknown0 VarInt
Unknown1 VarInt
Unknown2 VarInt
Is Willing Boolean
Trader Entity ID SignedVarLong
Player Entity ID SignedVarLong
Display Name String
NamedTag NBT


Update Equip

Packet ID Bound To Field Name Field Type Notes
0x51 Client Window ID Byte
Window Type Byte
Unknown Byte
Entity ID SignedVarLong
NamedTag NBT


Resource Pack Data Info

Packet ID Bound To Field Name Field Type Notes
0x52 Client Package ID String
Max Chunk Size Unsigned Int
Chunk Count Unsigned Int
Compressed Package Size Unsigned Long
Hash ByteArray
Is Premium Boolean
Pack Type Byte


Resource Pack Chunk Data

Packet ID Bound To Field Name Field Type Notes
0x53 Client Package ID String
Chunk Index Unsigned Int
Progress Unsigned Long
Payload ByteArray


Resource Pack Chunk Request

Packet ID Bound To Field Name Field Type Notes
0x54 Server Package ID String
Chunk Index Unsigned Int


Transfer

Sent by the server to transfer a player from the current server to another. Doing so will fully disconnect the client, bring it back to the main menu and make it connect to the next server.

Packet ID Bound To Field Name Field Type Notes
0x55 Client Address String
Port Unsigned Short


Play Sound

Packet ID Bound To Field Name Field Type Notes
0x56 Client Sound name String
Sound position Position
Volume Float
Pitch Float


Stop Sound

Packet ID Bound To Field Name Field Type Notes
0x57 Client Sound Name String
Stopping All Sound Boolean


Set Title

Sent by the server to make a title, subtitle or action bar shown to a player. It has several fields that allow setting the duration of the titles.

Packet ID Bound To Field Name Field Type Notes
0x58 Client Type SignedVarInt
Text String
Fade In Time SignedVarInt
Stay Time SignedVarInt
Fade Out Time SignedVarInt


Add Behavior Tree

Sent by the server. Its usage remains unknown, as behavior packs are typically all sent at the start of the game.

Packet ID Bound To Field Name Field Type Notes
0x59 Client Behavior Tree JSON String


Structure Block Update

When client change the Structure Block Screen and close it, client will send it to server to update.


Packet ID Bound To Field Name Field Type Notes
0x5A Client Block Position Block Position
Structure Data Structure Editor Data
Trigger it? Boolean

Structure Editor Data

Field Name Field Type Field Notes
Structure String
Data Field String Used in datga mode
Included players? Boolean
Show bounding box? Boolean
Block Type varint Data = 0
Save = 1
Load = 2
Corner = 3
Invalid = 4
Export = 5
Cound = 6
Settings Field Name Field Type Field Notes
Palette Name String
Ignore Entities? Boolean
Ignore Blocks? Boolean
Size Block Position
Offset Block Position
Last Editor Editor Unique ID
Rotation byte None = 0
90 = 1
180 = 2
270 = 3
Total = 4
Mirror byte None = 0
X = 1
Z = 2
XZ = 3
Animation Mode byte None = 0
Layers = 1
Blocks = 2
Animation Seconds float
Integrity Value fload
Integrity Speed Unsigned int
Rotation Pivot Vector3
Save Mode varint Memory = 0
Disk = 1

Show Store Offer

Sent by the server to show a Marketplace store offer to a player. It opens a window client-side that displays the item.

The packet only works on partnered servers: Servers that are not partnered will not have a store button show up on the in-game pause menu and will, as a result, not be able to open store offers on the client side. Sending the packet does therefore not work when using a proxy that is connected to with the domain of one of the partnered servers.

Packet ID Bound To Field Name Field Type Notes
0x5B Client Offer Id String
Shown To All Boolean


Purchase Receipt

Sent by the client to notify the server it purchased an item from the marketplace store that was offered by the server.

The packet is only used for partnered servers.

Packet ID Bound To Field Name Field Type Notes
0x5C Server


Player Skin

Sent by the client when it updates its own skin using the in-game skin picker. It is relayed by the server, or sent if the server changes the skin of a player on its own accord.

Note that the packet can only be sent for players that are in the player list at the time of sending.

Packet ID Bound To Field Name Field Type Notes
0x5D Server & Client UUID UUID
Skin Skin
Skin Name String
Old Skin Name String


Sub Client Login

Sent when an additional player attempts to join from a split screen session. The contents of the chain data and skin data fields use the same format as the Login packet, and can be decoded the same way.

Packet ID Bound To Field Name Field Type Notes
0x5E Server Chain data JSON array of JWT Data Contains the display name, UUID and XUID
Skin data JWT Data


Automation Client Connect

Sent by the server to make the client connect to a websocket server. This websocket server has the ability to execute commands on the behalf of the client and it canlisten for certain events fired by the client.

Packet ID Bound To Field Name Field Type Notes
0x5F Client Address String


Set Last Hurt By

Sent by the server to let the client know what entity type it was last hurt by. At this moment, the packet is useless and should not be used. There is no behaviour that depends on if this packet is sent or not.

Packet ID Bound To Field Name Field Type Notes
0x60 Client Entity Type Id VarInt


Book Edit

Sent by the client when it edits a book. It is sent each time a modification was made and the player stops its typing 'session', rather than simply after closing the book.

Packet ID Bound To Field Name Field Type Notes
0x61 Client


NPC Request

Sent by the client when it interacts with an NPC.

The packet is specifically for Education Edition, where NPCs are available to use. It has no use in the base game.

Packet ID Bound To Field Name Field Type Notes
0x62 Server & Client Runtime Entity ID VarLong
Unknown0 Byte
Unknown1 String
Unknown2 Byte


Photo Transfer

Sent by the server to transfer a photo (image) file to the client. It is typically used to transfer photos so that the client can display it in a portfolio in Education Edition.

While previously usable in the base game, the displaying of photos in books was disabled and the packet has little use anymore.

The packet is specifically for Education Edition. It has no use in the base game.

Packet ID Bound To Field Name Field Type Notes
0x63 Server File name String
Image data String
Unknown2 String


Model Form Request

Sent by the server to make the client open a form.

Packet ID Bound To Field Name Field Type Notes
0x64 Client Form Id VarInt
Form Data String


Model Form Response

Packet ID Bound To Field Name Field Type Notes
0x65 Server Form Id VarInt
Form Data String


Server Settings Request

Packet ID Bound To Field Name Field Type Notes
0x66 Server


Server Settings Response

Packet ID Bound To Field Name Field Type Notes
0x67 Client Form Id VarLong
Form Data String


Show Profile

Sent by the server to show the Xbox Live profile of one player to another.

Packet ID Bound To Field Name Field Type Notes
0x68 Client Xuid String If the XUID is invalid, the client ignores the packet


Set Default Game Type

Sent by the client when it toggles the default game type in the settings UI, and is sent by the server when it actually changes the default game type, resulting in the toggle being changed in the settings UI.

Packet ID Bound To Field Name Field Type Notes
0x69 Client Game mode VarInt


Remove Objective

Packet ID Bound To Field Name Field Type Notes
0x6A Client Objective Id String


Set Display Objective

Packet ID Bound To Field Name Field Type Notes
0x6B Client Display Slot String
Objective Id String
Display Name String
Criteria String
Sort Order SignedVarInt


Set Score

Sent by the server to send the contents of a scoreboard to the player. It may be used to either add, remove or edit entries on the scoreboard.

Packet ID Bound To Field Name Field Type Notes
0x6C Client Action byte 0 (Add), 1 (Remove)
Entries ScoreEntries


Lab Table

Sent by the client to let the server know it started a chemical reaction in Education Edition, and is sent by the server to allow other clients to show the effects.

This packet is only functional if Education features are enabled.

Packet ID Bound To Field Name Field Type Notes
0x6D Server & Client Unknown Byte 0 Byte
Block Entity Position X VarInt
Block Entity Position Y VarInt
Block Entity Position Z VarInt
Reaction Type Byte


Update Block Synced

Sent by the server to synchronize the falling of a falling block entity with the transitioning back and forth from and to a solid block. It is used to prevent the entity from flickering, and is used in places such as the pushing of blocks with pistons.

Packet ID Bound To Field Name Field Type Notes
0x6E Client Coordinates BlockCoordinates
Block Runtime ID VarInt
Block Priority VarInt
Data Layer ID VarInt
Runtime Entity ID VarLong
Block Synced Type VarLong 0 - None, 1 - Create, 2 - Destroy

Move Entity Delta

Sent by the server to move an entity by a given delta. The packet is specifically optimized to save as much space as possible, by only writing non-zero fields.

Packet ID Bound To Field Name Field Type Notes
0x6F Client Runtime Entity ID VarLong
Flags Unsigned Short

Flags

Field Bit
HAS_X 0x01
HAS_Y 0x02
HAS_Z 0x4
HAS_PITCH 0x8
HAS_YAW 0x10
HAS_ROLL 0x20


Set Scoreboard Identity

Sent by the server to change the identity type of one of the entries on a scoreboard. This is used to change, for example, an entry pointing to a player, to a fake player when it leaves the server, and to change it back to a real player when it joins again.

In non-vanilla situations, this packet is quite useless.

Packet ID Bound To Field Name Field Type Notes
0x70 Client Action byte 0 (Add), 1 (Remove)
Entries ScoreboardIdentityEntries


Set Local Player As Initialized

Sent by the client in response to a |Play Status with the status Player Spawn (3). The packet marks the moment at which the client is fully initialized and can receive any packet without discarding it.

Packet ID Bound To Field Name Field Type Notes
0x71 Server Runtime Entity Id VarLong


Update Soft Enum

Sent by the server to update a soft enum, also known as a dynamic enum, previous sent in the Available Commands packet. It is sent whenever the enum should get new options or when some of its options should be removed.

Packet ID Bound To Field Name Field Type Notes
0x72 Client
Enum Data EnumData TODO
Action byte 0 (Add), 1 (Remove), 2 (Update)


Network Stack Latency

Sent by the server (and the client, on development builds) to measure the latency over the entire Minecraft stack, rather than the RakNet latency.

It has over usages too, such as the ability to be used as some kind of acknowledgement packet, to know when the client has received a certain other packet.

Packet ID Bound To Field Name Field Type Notes
0x73 Server & Client Timestamp Unsigned Long
Send Back Boolean


Script Custom Event

Sent by both the client and server. It is a way to let scripts communicate with the server, so that the client can let the server know it triggered an event, or the other way around.

Packet ID Bound To Field Name Field Type Notes
0x75 Server & Client Event Name String
Data String Typically a JSON encoded string that the script is able to encode and decode too


Spawn Particle Effect

Sent by the server to spawn a particle effect client-side. Unlike other packets that result in the appearing of particles, this packet can show particles that are not hardcoded in the client. They can be added and changed through behavior packs to implement custom particles.

Packet ID Bound To Field Name Field Type Notes
0x76 Client Dimension Id Byte
Unique Entity Id SignedVarLong
Position Vector3
Identifier String The name of the particle
molangVariablesJson String JSON data that sets initial Molang variables for particles, which the client can access. Must be set to empty if not used. See below for an example. 
[
  {
    "name": "variable.color", // top level variable
    "value": {
      "type": "member_array", // type; use float for values and member_array for sub-variables
      "value": [
        {
          "name": ".r",
          "value": {
            "type": "float",
            "value": 1
          }
        },
        {
          "name": ".g",
          "value": {
            "type": "float",
            "value": 0
          }
        },
        {
          "name": ".b",
          "value": {
            "type": "float",
            "value": 0
          }
        },
        {
          "name": ".a",
          "value": {
            "type": "float",
            "value": 1
          }
        }
      ]
    }
  }
]

Available Entity Identifiers

Sent by the server at the start of the game to let the client know all entities that are on the server.

Packet ID Bound To Field Name Field Type Notes
0x77 Client NamedTag NBT


Level Sound Event (2)

Packet ID Bound To Field Name Field Type Notes
0x78 Server & Client Sound ID Byte
Position Vector3
Block Id SignedVarInt
Entity Type String
Is baby mob Boolean
Is global Boolean


Network Chunk Publisher Update

Sent by the server to change the point around which chunks are and remain loaded.

This is useful for minigame servers, where only one area is ever loaded, in which case the Network Chunk Publisher packet can be sent in the middle of it, so that no chunks ever need to be additionally sent during the course of the game.

In reality, the packet is not extraordinarily useful, and most servers just sent it constantly at the position of the player.

If the packet is not sent at all, no chunk will be shown to the player, regardless of where they are sent.

Packet ID Bound To Field Name Field Type Notes
0x79 Client Coordinates BlockCoordinates
Radius VarInt


Biome Definition List

Sent by the server to let the client know all biomes that are available and implemented on the server side.

Packet ID Bound To Field Name Field Type Notes
0x7A Client NamedTag NBT


Level Sound Event (3)

Packet ID Bound To Field Name Field Type Notes
0x7B Server & Client Sound ID VarInt
Position Vector3
Block Id SignedVarInt
Entity Type String
Is baby mob Boolean
Is global Boolean


Level Event Generic

Sent by the server to send a 'generic' level event to the client. This packet sends an NBT serialized object and may for that reason be used for any event holding additional data.

Packet ID Bound To Field Name Field Type Notes
0x7C Client


Lectern Update

Sent by the client to update the server on which page was opened in a book on a lectern, or if the book should be removed from it.

Packet ID Bound To Field Name Field Type Notes
0x7D Client Page Byte
Total Pages Byte
Block Position Position
Dropping Book Boolean


Video Stream Connect

Packet ID Bound To Field Name Field Type Notes
0x7E Client Server URI String
Frame Send Frequency Float
Action Byte
Resolution X Int
Resolution Y Int


Client Cache Status

Sent by the client at the start of the game. It is sent to let the server know if it supports the client-side blob cache. Clients such as Nintendo Switch do not support the cache, and attempting to use it anyway will fail.

Packet ID Bound To Field Name Field Type Notes
0x81 Server & Client Supported Boolean


On Screen Texture Animation

Sent by the server to show a certain animation on the screen of the player. The packet is used, for example, for when a raid is triggered and a raid a defeated.

Packet ID Bound To Field Name Field Type Notes
0x82 Client Animation Type Int


Map Create Locked Copy

Sent by the server to create a locked copy of a map into another map. It is used in the cartography table to create a map that is locked and cannot be modified.

Packet ID Bound To Field Name Field Type Notes
0x83 Client Original Map Id VarLong
New Map Id VarLong


Structure Template Data Request

Sent by the client to request data of a structure.

Packet ID Bound To Field Name Field Type Notes
0x84 Client Structure Name String
Position Block Position
Settings Structure Settings (see Structure Block Update -> Structure Editor Data -> Settings)
Reqiested Operation byte None = 0, Export From Save Mode = 1, Export From Load Mode = 2, Query Saved Structure = 3

Structure Template Data Response

Sent by the server to send data of a structure to the client in response to a Structure Template Data Export Request packet.


Packet ID Bound To Field Name Field Type Notes
0x85 Client Structure Name String This is the name used to export the structure to a file
Requested structure exists? if exists Failure Boolean
Response Type byte
if not exists Success Boolean
NBT Compound Tag
Response Type byte

Update Block Properties

Sent by the server to update the available block properties.

Packet ID Bound To Field Name Field Type Notes
0x86 Client NamedTag NBT


Client Cache Blob Status

Sent by the client to let the server know what blobs it already has, in an ACK type system.

Packet ID Bound To Field Name Field Type Notes
0x87 Client


Client Cache Miss Response

Sent by the server in response to a Client Cache Blob Status and contains the blob data of all blobs that the client acknowledged not to have yet.

Packet ID Bound To Field Name Field Type Notes
0x88 Client Blobs


Network Settings

Sent by the server to update a variety of network settings. These settings modify the way packets are sent over the network stack.

Packet ID Bound To Field Name Field Type Notes
0x8F Client Compression threshold Short The maximum size of a packet this is compressed when sent. If the size of the packet is under this value, it is not compressed. When set to 0, all packets will be uncompressed.


Player Auth Input

Sent by the client to allow for server authoratative movement. It is used to synchronize the player input with the position server-side.

The client sends this packet when the 'Server Authoritive Movement' field in the Start Game packet is set to true, instead of the Move Player packet. The client will send this packet once every tick.

Packet ID Bound To Field Name Field Type Notes
0x90 Client


Creative Content

Sent by the server to set the creative inventory's content for a player.

Introduced in 1.16, this packet replaces the previous method of sending an Inventory Content packet with the creative inventory window ID. This packet must be sent from a server after the StartGamePacket since 1.16.100. Otherwise, the client will crash!

Packet ID Bound To Field Name Field Type Notes
0x91 Client

Player Enchant Options

Sent by the server to update the enchantment options displayed when the user opens the enchantment table and puts an item in.

This packet was added in 1.16 and allows the server to decide on the enchantment that can be selected by a player. The player should be sent once for every slot update of the enchantment table. The vanilla server sends an empty packet when the player first opens the enchantment table (air is is present in the enchantment table slot) and sends a packet with actual enchantments in it when items are put in that can have enchantments.

Packet ID Bound To Field Name Field Type Notes
0x92 Client


Item Stack Request

Sent by the client to change item stacks in an inventory.

Added in 1.16, is essentially a replacement of the Inventory Transaction packet for inventory specific actions, such as moving items around or crafting.

The Inventory Transaction packet is still used for actions such as placing blocks and interacting with entities.

Packet ID Bound To Field Name Field Type Notes
0x93 Client


Item Stack Response

Sent by the server in response to an Item Stack Request packet from the client.

This packet is used to either approve or reject ItemStackRequests from the client. If a request is approved, the client will simply continue as normal. If rejected, the client will undo the actions so that the inventory should be in sync with the server again.

Packet ID Bound To Field Name Field Type Notes
0x94 Client


Player Armor Damage

Sent by the server to damage the armor of a player. It is a very efficient packet, but generally it's much easier to just send a slot update for the damaged armor.

Packet ID Bound To Field Name Field Type Notes
0x95 Client


Code Builder

Sent by the server to open the URL to a Code Builder (websocket) server.

This packet is only used by Education Edition and have no affect on the base game.

Packet ID Bound To Field Name Field Type Notes
0x96 Client


Update Player Game Type

Sent by the server to change the game mode of a player. It is functionally identical to the Set Player Game Type packet.

Packet ID Bound To Field Name Field Type Notes
0x97 Client


Emote List

Sent by the client every time it joins the server and when it equips new emotes. It may be used by the server to find out which emotes the client has available. If the player has no emotes equipped, this packet is not sent.

Under certain circumstances, this packet is also sent from the server to the client, but more testing is needed for this.

Packet ID Bound To Field Name Field Type Notes
0x98 Client


Position Tracking DB Server Broadcast

Sent by the server in response to the Position Tracking DB Client Request packet. Thus packet is, as of 1.16, currently only for lodestones. The server maintains a database with tracking IDS and their position and dimension. The client will request these tracking IDs, (NBT tag set on the lodestone compass with the tracking ID?) and the server will respond with the status of those tracking IDs.

What is actually done with the data sent depends on what the client chooses to do with it. For the lodestone compass, it is used to make the compass point towards lodestones and to make it spin if the lodestone at a position is no longer there.

Packet ID Bound To Field Name Field Type Notes
0x99 Client


Position Tracking DB Client Request

Sent by the client to request the position and dimension of a 'tracking ID'. These IDs are tracked in a database by the server. In 1.16, this is used for lodestones.

The client will sent this request to find the position a lodestone compass needs to point to. If found, it will point to the lodestone. If not, it will start spinning around.

A Position Tracking DB Server Broadcast packet should be sent in response to this packet.

Packet ID Bound To Field Name Field Type Notes
0x9a Client


Debug Info

Sent by the server. It does not seem to do anything when sent to the normal client in 1.16;

Packet ID Bound To Field Name Field Type Notes
0x9b Client


Packet Violation Warning

Sent by the client when it receives an invalid packet from the server. It holds some information on the error that occured.

Packet ID Bound To Field Name Field Type Notes
0x9c Client

Animate Entity

Indicates that the client should play the specified animation on the selected entities. This is the packet used for the /playanimation command found on vanilla Bedrock (https://minecraft.fandom.com/wiki/Commands/playanimation).

Packet ID Bound To Field Name Field Type Notes
0x9E Client Animation String The animation to play on the specified entities. Produces no warnings if the animation is invalid for this entity.
Next State String The entity state to move to when the animation has finished playing. Defaults to default on a normal Bedrock server.
Stop Expression String A Molang expression of when to stop the animation. Defaults to query.any_animation_finished on a normal Bedrock server.
Controller String Specifies the animation controller to use for this animation. Defaults to __runtime_controller on a normal Bedrock server.
Blend Out Time Float LE How long to take to move from the specified animation to the next animation. Defaults to 0 on a normal Bedrock server.
Entity Array Size Unsigned VarInt The size of the following array
Runtime Entity ID Array Unsigned VarLong A runtime entity ID to perform this animation on

Item Component

Always sent by a vanilla Bedrock server after the StartGamePacket. Sent not empty for items with data driven information.

In order for the information in this packet to be used, the experiment data titled data_driven_items must be set to true in the ResourcePackStackPacket (as of 1.16.100), and the item entry in StartGamePacket must have its component toggle set to true.

Packet ID Bound To Field Name Field Type Notes
0xA2 Client Items ComponentItemData[] A list of all item components.

ComponentItemData takes in a String identifier and an NBT CompoundTag containing item data. Valid, minimal NBT data looks like the following (Any comments are preceded with //): 

{
  "components": {
    "item_properties": {
      "allow_off_hand": 1b,
      "hand_equipped": 1b,
      "max_stack_size": 1i
    },
    "minecraft:icon": {
      "texture": "example_item" // Required even with a resource pack, or else the client complains about icon texture
    }
  },
  "id": 1020i, // The runtime ID of the item
  "name": "wikivg:example_item"
}

A list of all known valid item properties (and descriptions, if added):

Property name Property type Property description
allow_off_hand boolean If the item is permitted in the offhand inventory slot.
animates_in_toolbar boolean
can_destroy_in_creative boolean the item can box the blocks in creative
creative_category integer 1 is the construction, 2 is the nature, 3 is the equipment, 4 is the items, the default value is 1
creative_group string TODO
damage integer shows the number of damge attacks
enchantable_slot string
enchantable_value integer
explodable boolean
foil boolean The maximum amount of this item that can be in an inventory slot.
frame_count integer
hand_equipped boolean If the item should be visually held like a tool.
ignores_permissions boolean
liquid_clipped boolean gives the possibility to click on a liquid
max_stack_size integer The maximum amount of this item that can be in an inventory slot.
mining_speed float
mirrored_art boolean
requires_interact boolean
should_despawn boolean
stacked_by_data boolean
use_animation integer
use_duration integer

Other item components can be found here: https://bedrock.dev/docs/stable/Item#Item%20Components (Add these in the same format as minecraft:icon shown above). Also see: https://wiki.bedrock.dev/concepts/items

Filter Text

Since 1.16.200, this packet is sent for to all anvil and cartography table rename inputs (I.E. typing a single character will send this packet). The client expects a response back, or else it will assume that the item cannot be renamed (which can be used to block renaming items).

Packet ID Bound To Field Name Field Type Notes
0xA3 Both Text String The string to be checked (if serverbound), or checked (if clientbound). If this packet is clientbound, then the client will use this text for the final output of the item - the input box itself will not be modified, but the item in the output box will show this 'filtered' text.
From Server Boolean True if sent from the server; otherwise false.
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