---
title: Use Item On
description: "Play 0x42, client → server."
---

`play` · `0x42` · **serverbound** (client → server)

Sent when the player right-clicks a block. `location`, `direction`, and cursor coordinates describe the hit, `insideBlock` and `worldBorderHit` are hit flags, and `hand` is the hand used. `sequence` is echoed in `BlockChangedAck`. The server places blocks, opens containers, or uses the item on the block.

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

## Fields

| Field | Type | Notes |
|---|---|---|
| `hand` | VarInt |  |
| `location` | Position | also `position` |
| `direction` | VarInt | also `face` |
| `cursorX` | Float | also `cursorPositionX` |
| `cursorY` | Float | also `cursorPositionY` |
| `cursorZ` | Float | also `cursorPositionZ` |
| `insideBlock` | Boolean |  |
| `worldBorderHit` | Boolean |  |
| `sequence` | VarInt |  |

## Send it

```ts
await client.sendPacket("UseItemOn", {
  hand: /* VarInt */,
  location: /* Position */,
  direction: /* VarInt */,
  cursorX: /* Float */,
  cursorY: /* Float */,
  cursorZ: /* Float */,
  insideBlock: /* Boolean */,
  worldBorderHit: /* Boolean */,
  sequence: /* VarInt */,
});
```

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

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