protocol-v2.1.5.md

Agar.io Protocol Version 2.1.5

Agar.io has decided to change their protocol once again. Many extension makers are not happy with the update since all extensions that do not use the newest protocol are broken.

Server -> client

Init keys

First two authorisation tokens

new Int8Array([-2,6,0,0,0]);
new Int8Array([-1,-78,-86,42,-87]);

Server -> client

Every packet that comes from the server starts with a 1 byte header, which indicates the message type.

Index

• Packet 18 | Reset playercells
• Packet 32 | Cell Ids
• Packet 49 | LeaderBoard
• Packet 64 | Viewport
• Packet 255 | Cells update

Packet 18 | Reset playercells

Resets all playercells their location and id. Probably used to try to patch bots.

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	18
?	?	?	?	?

Packet 32 | Cell Ids

offset	Bytes	Data Type	Description	Default
0	1	Uint32	Packet ID	32
?	?	?	?	?

Packet 49 | LeaderBoard

Top 10 dominating cells.

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	49
?	?	?	?	?

Packet 64 | Viewport

Tells the client his viewport

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	64
?	?	?	?	?

Packet 255 | Cells update

Tells the client his viewport

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	255
?	?	?	?	?

Client -> Server

Index

• Packet 0 | Nickname / Spawn
• Packet 16 | Update movement
• Packet 102 | Facebook / Google+ token

Packet 0 | Nickname / Spawn

Login with facebook / Google+ token

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	16
1	?	?	?	?

Packet 16 | Update movement

Tells the server his direction

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	16
1	4	Int32	Position x	?
5	4	Int32	Position y	?
9	4	Int32	Token	?

Packet 102 | Facebook / Google+ token

Login with facebook / Google+ token

offset	Bytes	Data Type	Description	Default
0	1	Uint8	Packet ID	16
1	?	?	?	?