Custom Payload (serverbound)

Play 0x16, client → server.

play · 0x16 · serverbound (client → server)

Plugin message in the play state. channel is a namespaced identifier and data is arbitrary bytes (up to 32767). Vanilla uses minecraft:brand; mods and plugins use their own channels. The server ignores unknown channels.

Sent by the client, read by the server. Listen for it with client.on("CustomPayload", (data) => …) on the receiving side.

Fields

Field	Type	Notes
`channel`	String
`data`	Byte[]

Send it

await client.sendPacket("CustomPayload", {
  channel: /* String */,
  data: /* Byte[] */,
});

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: src/Core/Versions/776/Packets/play/serverbound/CustomPayload.ts