Keep Alive (serverbound)

Play 0x1C, client → server.

play · 0x1C · serverbound (client → server)

Response to a clientbound KeepAlive. keepAliveId must match the id the server sent. The server disconnects the client if no matching reply arrives within about 30 seconds; it also uses the round-trip time for the player’s latency.

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

Fields

Send it

client.on("KeepAlive", async (data) => {
  await client.sendPacket("KeepAlive", { keepAliveId: data.keepAliveId });
});

Echo the ID from the server’s KeepAlive unchanged. The vanilla server kicks a client that answers with the wrong ID or does not answer in time.

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

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