task.checklistitem.add

curl -X POST \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
-d '{"TASKID":13,"FIELDS":{"TITLE":"Подготовить отчет","PARENT_ID":457,"SORT_INDEX":200,"IS_COMPLETE":"N","IS_IMPORTANT":"Y","MEMBERS":{"547":{"TYPE":"A"}}},"auth":"**put_access_token_here**"}' \
https://**put_your_bitrix24_address**/rest/task.checklistitem.add

// This snippet is an ES module: top-level await requires type="module" or a bundler.
// $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
import { Text } from '@bitrix24/b24jssdk'
import type { B24Frame } from '@bitrix24/b24jssdk'

declare const $b24: B24Frame

// Shape of the payload returned in result (match the "response handling" section of the page)
type ChecklistItemAddResult = number

try {
  const response = await $b24.actions.v2.call.make<ChecklistItemAddResult>({
    method: 'task.checklistitem.add',
    params: {
      TASKID: 13,
      FIELDS: {
        TITLE: 'Prepare the report',
        PARENT_ID: 457,
        SORT_INDEX: 200,
        IS_COMPLETE: 'N',
        IS_IMPORTANT: 'Y',
        MEMBERS: {
          547: {
            TYPE: 'A',
          },
        },
      },
    },
    requestId: Text.getUuidRfc4122()
  })

  // The payload is available only on a successful response
  if (!response.isSuccess) {
    console.error(response.getErrorMessages().join('; '))
  } else {
    const result = response.getData()!.result
    console.info('Created checklist item with ID:', result)
  }
} catch (error) {
  // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
  console.error(error)
}

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
<script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
<script>
  async function addChecklistItem() {
    try {
      // Initialize the SDK inside a Bitrix24 frame
      const $b24 = await B24Js.initializeB24Frame()

      const response = await $b24.actions.v2.call.make({
        method: 'task.checklistitem.add',
        params: {
          TASKID: 13,
          FIELDS: {
            TITLE: 'Prepare the report',
            PARENT_ID: 457,
            SORT_INDEX: 200,
            IS_COMPLETE: 'N',
            IS_IMPORTANT: 'Y',
            MEMBERS: {
              547: {
                TYPE: 'A',
              },
            },
          },
        },
        requestId: B24Js.Text.getUuidRfc4122()
      })

      // The payload is available only on a successful response
      if (!response.isSuccess) {
        console.error(response.getErrorMessages().join('; '))
        return
      }

      const result = response.getData().result
      console.info('Created checklist item with ID:', result)
    } catch (error) {
      // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
      console.error(error)
    }
  }

  document.addEventListener('DOMContentLoaded', addChecklistItem)
</script>

from b24pysdk.errors import BitrixAPIError, BitrixSDKException

fields = {
    "TITLE": "Подготовить отчет",
    "PARENT_ID": 457,
    "SORT_INDEX": 200,
    "IS_COMPLETE": "N",
    "IS_IMPORTANT": "Y",
    "MEMBERS": {
        "547": {
            "TYPE": "A",
        },
    },
}

try:
    bitrix_response = client.task.checklistitem.add(
        task_id=13,
        fields=fields,
    ).response
    result = bitrix_response.result
    print(result)
except BitrixAPIError as error:
    print(
        "Ошибка Bitrix API",
        f"error: {error.error}",
        f"error_description: {error.error_description}",
        sep="\n",
    )
except BitrixSDKException as error:
    print(f"Ошибка Bitrix SDK: {error.message}")
except Exception as error:
    print(f"Непредвиденная ошибка: {error}")

try {
    $response = $b24Service
        ->core
        ->call(
            'task.checklistitem.add',
            [
                'TASKID' => 13,
                'FIELDS' => [
                    'TITLE' => 'Подготовить отчет',
                    'PARENT_ID' => 457,
                    'SORT_INDEX' => 200,
                    'IS_COMPLETE' => 'N',
                    'IS_IMPORTANT' => 'Y',
                    'MEMBERS' => [
                        547 => [
                            'TYPE' => 'A'
                        ]
                    ]
                ]
            ]
        );

    $result = $response
        ->getResponseData()
        ->getResult();

    echo 'Success: ' . print_r($result, true);
    processData($result);

} catch (Throwable $e) {
    error_log($e->getMessage());
    echo 'Error adding checklist item: ' . $e->getMessage();
}

BX24.callMethod(
    'task.checklistitem.add',
    {
        'TASKID': 13,
        'FIELDS': {
            'TITLE': 'Подготовить отчет',
            'PARENT_ID': 457,
            'SORT_INDEX': 200,
            'IS_COMPLETE': 'N',
            'IS_IMPORTANT': 'Y',
            'MEMBERS': {
                547: {
                    'TYPE': 'A'
                }
            }
        }
    },
    function(result){
        console.info(result.data());
        console.log(result);
    }
);

require_once('crest.php');

$result = CRest::call(
    'task.checklistitem.add',
    [
        'TASKID' => 13,
        'FIELDS' => [
            'TITLE' => 'Подготовить отчет',
            'PARENT_ID' => 457,
            'SORT_INDEX' => 200,
            'IS_COMPLETE' => 'N',
            'IS_IMPORTANT' => 'Y',
            'MEMBERS' => [
                547 => [
                    'TYPE' => 'A'
                ]
            ]
        ]
    ]
);

echo '<PRE>';
print_r($result);
echo '</PRE>';

// client и ctx уже созданы — см. раздел «SDK для Go»
res, err := client.Core().Call(ctx, "task.checklistitem.add", b24.Params{
	"TASKID": 13,
	"FIELDS": b24.Params{
		"TITLE":        "Подготовить отчет",
		"PARENT_ID":    457,
		"SORT_INDEX":   200,
		"IS_COMPLETE":  "N",
		"IS_IMPORTANT": "Y",
		"MEMBERS": b24.Params{
			"547": b24.Params{
				"TYPE": "A",
			},
		},
	},
})
if err != nil {
	return fmt.Errorf("task.checklistitem.add: %w", err)
}

var newID b24.ID
if err := json.Unmarshal(res.Result, &newID); err != nil {
	return fmt.Errorf("разбор ответа: %w", err)
}
fmt.Println("идентификатор:", newID)