# setMessageReaction

Source: https://core.telegram.org/bots/api#setmessagereaction

[Documentation index](../llms.txt)

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.

| 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](reactiontype.md) | 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 |