> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blinkops.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Reaction

Add a reaction to a post.

**Required Permissions**: `read_channel` for the channel the post is in.

<Note>
  External Documentation

  To learn more, visit the [Mattermost documentation](https://developers.mattermost.com/api-documentation/#/operations/SaveReaction).
</Note>

## Parameters

<div className="integrations-table">
  | Parameter  | Description                                                       |
  | ---------- | ----------------------------------------------------------------- |
  | Create At  | The timestamp of the reaction.                                    |
  | Emoji Name | The name of the emoji to react with.                              |
  | Post ID    | The ID of the post.                                               |
  | User ID    | The ID of the user. Can be obtained from the `List Users` action. |
</div>

## Example Output

```json theme={"dark"}
{
	"user_id": "string",
	"post_id": "string",
	"emoji_name": "string",
	"create_at": -9007199254740991
}
```

## Workflow Library Example

[Create Reaction with Mattermost and Send Results Via Email](https://library.blinkops.com/workflows/create-reaction-with-mattermost-and-send-results-via-email)

<div className="iframe-wrapper">
  <div className="iframe-media">
    <img src="https://mintcdn.com/blinkops-2/ojHYuDeYX5FWuN8a/img/Icons/play-box.svg?fit=max&auto=format&n=ojHYuDeYX5FWuN8a&q=85&s=b8af968e71438a9499c3223c9bd29fb2" alt="Workflow Library" width="16" height="16" data-path="img/Icons/play-box.svg" />

    Preview this Workflow on desktop
  </div>

  <iframe className="iframe" src="https://library.blinkops.com/workflows/create-reaction-with-mattermost-and-send-results-via-email/canvas" />
</div>