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

# ZaloSelectObjectTask

> Solve Zalo select-object captcha

Selecting objects is a popular type of image verification.

<Frame>
  <img src="https://mintcdn.com/omocaptcha/Jc1mwaiUF23R0W3R/images/zalo-select-object-modal.png?fit=max&auto=format&n=Jc1mwaiUF23R0W3R&q=85&s=9d1b2d6fd501ddaa5c6cc419bc0a5251" style={{ maxWidth: "360px", width: "100%" }} width="454" height="610" data-path="images/zalo-select-object-modal.png" />
</Frame>

## 1. Create task

**Request**

```http theme={null}
POST https://api.omocaptcha.com/v2/createTask
```

| Parameter          | Type     | Required | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| ------------------ | -------- | :------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `clientKey`        | `String` |     ✅    | Customer account key                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| `task.type`        | `String` |     ✅    | Captcha service class name to solve: `ZaloSelectObjectTask`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| `task.imageBase64` | `String` |     ✅    | Base64-encoded 3x3 grid image <br /><br /><img src="https://mintcdn.com/omocaptcha/Jc1mwaiUF23R0W3R/images/zalo-select-object-grid.png?fit=max&auto=format&n=Jc1mwaiUF23R0W3R&q=85&s=a7d9db20becc0e725e495e4734e85f37" style={{ maxWidth: "260px", width: "100%" }} width="460" height="460" data-path="images/zalo-select-object-grid.png" />                                                                          |
| `task.other`       | `String` |     ✅    | Captcha question text (e.g. `Chọn tất cả ảnh có: biển báo giao thông`) <br /><br /><img src="https://mintcdn.com/omocaptcha/Jc1mwaiUF23R0W3R/images/zalo-select-object-question.png?fit=max&auto=format&n=Jc1mwaiUF23R0W3R&q=85&s=b8e188ea15f8965f938aebf7777e5eb3" style={{ maxWidth: "260px", width: "100%" }} width="450" height="611" data-path="images/zalo-select-object-question.png" /> |

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST https://api.omocaptcha.com/v2/createTask \
    -H "Content-Type: application/json" \
    -d '{
      "clientKey": "OMO_API_KEY",
      "task": {
        "type": "ZaloSelectObjectTask",
        "imageBase64": "BASE64_BODY_HERE",
        "other": "Chọn tất cả ảnh có: biển báo giao thông"
      }
    }'
  ```

  ```javascript Node.js theme={null}
  const axios = require('axios');

  const response = await axios.post('https://api.omocaptcha.com/v2/createTask', {
    clientKey: 'OMO_API_KEY',
    task: {
      type: 'ZaloSelectObjectTask',
      imageBase64: 'BASE64_BODY_HERE',
      other: 'Chọn tất cả ảnh có: biển báo giao thông'
    }
  });

  console.log(response.data);
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      'https://api.omocaptcha.com/v2/createTask',
      json={
          'clientKey': 'OMO_API_KEY',
          'task': {
              'type': 'ZaloSelectObjectTask',
              'imageBase64': 'BASE64_BODY_HERE',
              'other': 'Chọn tất cả ảnh có: biển báo giao thông'
          }
      }
  )

  print(response.json())
  ```

  ```php PHP theme={null}
  <?php
  $ch = curl_init('https://api.omocaptcha.com/v2/createTask');
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
      'clientKey' => 'OMO_API_KEY',
      'task' => [
          'type' => 'ZaloSelectObjectTask',
          'imageBase64' => 'BASE64_BODY_HERE',
          'other' => 'Chọn tất cả ảnh có: biển báo giao thông'
      ]
  ]));

  $response = curl_exec($ch);
  curl_close($ch);
  echo $response;
  ```
</CodeGroup>

**Response**

Success:

```json theme={null}
{
  "errorId": 0,
  "taskId": "49f9f60a-c809-4af0-93c0-0409b72e67e0"
}
```

The server returns `errorId = 0` and a `taskId` when the task is created successfully.

Failure:

```json theme={null}
{
  "errorId": 1,
  "errorCode": "",
  "errorDescription": ""
}
```

The server returns `errorId = 1` along with an `errorCode`.

## 2. Get task result

**Request**

```http theme={null}
POST https://api.omocaptcha.com/v2/getTaskResult
```

```json theme={null}
{
  "clientKey": "OMO_API_KEY",
  "taskId": "49f9f60a-c809-4af0-93c0-0409b72e67e0"
}
```

**Response**

Success:

```json theme={null}
{
  "errorId": 0,
  "status": "ready",
  "solution": {
    "objects": [0, 1, 2, 3]
  }
}
```

The server returns `errorId = 0` and `status = ready`. Read the result from `solution`.

| Field              | Type            | Description                                                                                           |
| ------------------ | --------------- | ----------------------------------------------------------------------------------------------------- |
| `solution.objects` | `Array<Number>` | List of tile indices to select in the 3x3 grid, numbered `0` to `8` from left to right, top to bottom |

<Tip>
  The 3x3 grid is indexed as follows: top row `0, 1, 2`, middle row `3, 4, 5`, bottom row `6, 7, 8`. Click every tile whose index appears in `solution.objects`, then press the **Xác thực** (Verify) button.
</Tip>

Processing:

```json theme={null}
{
  "status": "processing",
  "errorId": 0,
  "errorCode": "",
  "errorDescription": ""
}
```

The server returns `errorId = 0` and `status = processing` while the task is being processed. Please wait 2 seconds and retry.

Failure:

```json theme={null}
{
  "errorId": 1,
  "errorCode": "ERROR_JOB_STATUS",
  "errorDescription": "Job failed",
  "status": "fail",
  "solution": {}
}
```

The server returns `errorId = 1` when processing fails.