protocol_4-8.md

Source: https://github.com/forairan/Agar.io-Protocol/blob/master/Protocol.md

string = null terminated (before 6: utf-16, after + on 6: utf-8) string

Client -> Server

Set Nickname (spawns the player)

Offset	Data Type	Info
0	uint8	Packet ID (0)
1	string	Nickname

Spectate

Offset	Data Type	Info
0	uint8	Packet ID (1)

Mouse Move

(1) 4: float64, 5 early: int16, 5 late and 6: int32

Offset	Data Type	Info
0	uint8	Packet ID (16)
?	(1)	Mouse X
?	(1)	Mouse Y
?	uint32	Node ID of the cell to move (not used anymore).

Split

Offset	Data Type	Info
0	uint8	Packet ID (17)

Spectate free roam (Q key pressed)

Offset	Data Type	Info
0	uint8	Packet ID (18)

Q key released

Offset	Data Type	Info
0	uint8	Packet ID (19)

Eject Mass

Offset	Data Type	Info
0	uint8	Packet ID (21)

(Unoffical) Chat message

Offset	Data Type	Info
0	uint8	Packet ID (99)
1	uint8	Flags? 0
2	string	The chat message

Server -> Client

Update Nodes

(1) before 6: uint32, on + after: uint16

Offset	Data Type	Info
0	uint8	Packet ID (16)
1	uint16	Number of nodes to be destroyed
2...?	Destruct Data	Nodes' ID marked for destruction
?...?	Node Data	Data for all nodes
?	uint32	Always 0; terminates the node data listing
?	uint16	Always 0; discarded by the client
?	(1)	Number of nodes marked for destroying
?...?	Destruct Data	Node ID of each destroyed node (uint32)

Update Position and Size

Used for spectating.

Offset	Data Type	Info
0	uint8	Packet ID (17)
1	float32	X position
5	float32	Y position
9	float32	Zoom factor of client

(Protocol > 4) Clear All Nodes

Offset	Data Type	Info
0	uint8	Packet ID (18)

(Protocol > 4 ? Clear My Nodes : Clear Nodes)

Offset	Data Type	Info
0	uint8	Packet ID (20)

Draw Line

Drawn from all player cells to the specified position.

Offset	Data Type	Info
0	uint8	Packet ID (21)
1	uint16	X position
3	uint16	Y position

Add Node

Nodes added by this packet are centered on the client's camera.

Offset	Data Type	Info
0	uint8	Packet ID (32)
1	uint32	Node ID

Update Leaderboard (FFA)

Offset	Data Type	Info
0	uint8	Packet ID (49)

Update Leaderboard (Team)

Offset	Data Type	Info
0	uint8	Packet ID (50)

Set Border

(1) only sent first time, (2) ffa = 0, teams = 1, experimental = 4 and party = 8

Offset	Data Type	Info
0	uint8	Packet ID (64)
1	float64	Left position
9	float64	Top position
17	float64	Right position
25	float64	Bottom position
33	uint32	(1) (2) gamemode
34	string	(1) server version

(Unofficial) Chat Message

Offset	Data Type	Info
0	uint8	Packet ID (99)
1	uint8	Flags
2-4	uint8	RGB color
5	string	Username
?	string	The chat message

Reset Connection 1

Sent at the beginning of a conneciton, before reset connection 2. Server must send Clear Nodes and Set Border packets to keep the client connected.

Offset	Data Type	Description
0	uint8	Packet ID (254)
1	uint32	Protocol version

Reset Connection 2

Sent directly after reset connection 1.

Offset	Data Type	Description
0	uint8	Packet ID (255)
1	uint32	Protocol version