> ## Documentation Index
> Fetch the complete documentation index at: https://developer.z-api.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Mention everyone

> Mentions all participants in a group

## Overview

This method is responsible for mentioning all participants in a group at once, without the need to list each number individually.

<Warning>
  For the mention to appear as **@everyone** highlighted in green on WhatsApp (as a real mention), the message content must include `@all`.

  **Example:** `"Test message @all"`

  * `@everyone` and `@todos` **do not work** — only `@all` is recognized by WhatsApp
  * Works **only in groups** — not compatible with Newsletters
</Warning>

***

## Attributes

### Header

<ParamField path="instanceId" type="string" required>
  Your instance ID. Available in the Z-API panel under **Instances**.
</ParamField>

<ParamField path="token" type="string" required>
  Your Z-API instance token.
</ParamField>

### Required

<ParamField body="phone" type="string" required>
  ID of the group where all participants will be mentioned
</ParamField>

<ParamField body="message" type="string" required>
  Text to be sent. For the mention to appear correctly on WhatsApp, include `@all` in the message content
</ParamField>

<ParamField body="mentionAll" type="boolean" required>
  When `true`, mentions all participants in the group
</ParamField>

### Optional

<ParamField body="delayMessage" type="number">
  Delay added to the message. You can choose a range from 1 to 15 seconds. The default delay if not specified is 1 to 3 seconds
</ParamField>

***

## Request Body

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "phone": "120363019502650977-group",
  "message": "Test message @all",
  "mentionAll": true
}
```

***

## Response

### 200

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "zaapId": "019DXXXXXXXXXXXXXXXXXXXXXXXX8B",
  "messageId": "3EXXXXXXXXXXXXXXXD",
  "id": "3XXXXXXXXXXXXXXXXX1D"
}
```

### 400

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "error": "mentionAll can only be used in groups"
}
```

### 405

In this case, make sure you are correctly sending the method specification, i.e. verify that you sent POST or GET as specified at the beginning of this topic.

### 415

If you receive a 415 error, make sure to add the "Content-Type" of the object you are sending in the request headers, in most cases "application/json".