---
title: Attack
description: "Play 0x01, client → server."
---

`play` · `0x01` · **serverbound** (client → server)

Sent when the player attacks (left-clicks) an entity with numeric `entityId`. The server checks reach and validity, then applies damage. This replaces the attack case of `Interact`; it usually comes with a `Swing`.

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

## Fields

| Field | Type | Notes |
|---|---|---|
| `entityId` | VarInt |  |

## Send it

```ts
await client.sendPacket("Attack", {
  entityId: /* VarInt */,
});
```

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

Source: [`src/Core/Versions/776/Packets/play/serverbound/Attack.ts`](https://github.com/GDLev/mc-protocol/blob/master/src/Core/Versions/776/Packets/play/serverbound/Attack.ts)