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

# Assign Agent to WhatsApp Number

> Assign an existing WhatsApp AI Agent to a connected WhatsApp Business phone number.

## Overview

Assign a WhatsApp AI Agent to a connected WhatsApp Business phone number. Once assigned, all incoming WhatsApp conversations on that number will be handled by the selected AI Agent.

## Prerequisites

* Bearer Token authentication
* A connected WhatsApp Business phone number
* An existing WhatsApp AI Agent

## Request

<ParamField header="Authorization" type="string" required>
  Bearer token for authenticated workspace access.
</ParamField>

<RequestExample>
  ```bash cURL theme={null}
  curl --location '{{baseUrl}}/api/whatsapp/add-agent-in-whatsapp-number' \
  --header 'Authorization: Bearer {{authToken}}' \
  --header 'Content-Type: application/json' \
  --data '{
    "phoneNumberId": "123456789012345",
    "agentId": "6894a98a7fcde123456789ab"
  }'
  ```
</RequestExample>

## Request Body

<ParamField body="phoneNumberId" type="string" required>
  Unique identifier of the connected WhatsApp Business phone number.
</ParamField>

<ParamField body="agentId" type="string" required>
  Unique identifier of the WhatsApp AI Agent to assign.
</ParamField>

## Response

<ResponseExample>
  ```json 200 OK theme={null}
  {
    "status": true,
    "code": 200,
    "message": "Agent assigned successfully",
    "data": {
      "phoneNumberId": "123456789012345",
      "agentId": "6894a98a7fcde123456789ab"
    }
  }
  ```
</ResponseExample>

<ResponseField name="status" type="boolean">
  Indicates whether the request completed successfully.
</ResponseField>

<ResponseField name="code" type="integer">
  HTTP status code returned by the API.
</ResponseField>

<ResponseField name="message" type="string">
  Confirmation message indicating the agent was assigned successfully.
</ResponseField>

<ResponseField name="data" type="object">
  Assignment details.
</ResponseField>

<ResponseField name="data.phoneNumberId" type="string">
  WhatsApp Business phone number that received the agent assignment.
</ResponseField>

<ResponseField name="data.agentId" type="string">
  Assigned WhatsApp AI Agent ID.
</ResponseField>

## Error Handling

| Status | Description                                          |
| ------ | ---------------------------------------------------- |
| 400    | Missing or invalid request parameters                |
| 401    | Unauthorized or invalid Bearer token                 |
| 403    | Permission denied                                    |
| 404    | WhatsApp number or Agent not found                   |
| 409    | An agent is already assigned to this WhatsApp number |
| 500    | Internal server error                                |

<Note>
  A WhatsApp Business phone number can have only one active AI Agent assigned at a time. Assigning a different agent may replace the existing assignment.
</Note>

<Check>
  Related endpoints:

  * `GET /api/whatsapp/whatsapp-number` — List connected WhatsApp numbers.
  * `GET /api/whatsapp/get-whatsapp-agent` — List available WhatsApp Agents.
  * `PUT /api/whatsapp/remove-agent-in-whatsapp-number/{phoneNumberId}` — Remove the assigned agent from a WhatsApp number.
</Check>