# setMessageReaction

> Use this method to change the chosen reactions on a message

**Category:** Telegram Bot API — Methods (A-Z)  
**URL:** https://docs.botlify.cloud/setmessagereaction  
**Platform:** Botlify Cloud (https://botlify.cloud)  

---

Use this method to change the chosen reactions on a message. Service messages of some types can't be reacted to. Automatically forwarded messages from a channel to its discussion group have the same available reactions as messages in the channel. Bots can't use paid reactions. Returns *True* on success.

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| chat_id | Integer or String | Yes | Unique identifier for the target chat or username of the target bot, supergroup or channel in the format @username |
| message_id | Integer | Yes | Identifier of the target message. If the message belongs to a media group, the reaction is set to the first non-deleted message in the group instead. |
| reaction | Array of ReactionType | Optional | A JSON-serialized list of reaction types to set on the message. Currently, as non-premium users, bots can set up to one reaction per message. A custom emoji reaction can be used if it is either already present on the message or explicitly allowed by chat administrators. Paid reactions can't be used by bots. |
| is_big | Boolean | Optional | Pass True to set the reaction with a big animation |

## Example

```php

```

> [!TIP]
> **Botlify Cloud Runtime**
> Credentials are auto-injected in .env — always load them with getenv(): BOT_TOKEN, ADMIN_CHAT_ID, BOT_USERNAME. Main database: database.db (SQLite, WAL mode). Runtime errors: error.log. Quick test: send to $ADMIN_CHAT_ID. Full details: Runtime Reference.