Add Task tasks.task.add

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"fields":{"TITLE":"Task Title","DEADLINE":"2025-12-31T23:59:59","CREATED_BY":456,"RESPONSIBLE_ID":123,"UF_CRM_TASK":["L_4","C_7","CO_5","D_10"],"UF_TASK_WEBDAV_FILES":["n12345","n67890"]},"auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/tasks.task.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
        
        // Minimal shape of result.task; the API returns the full task object
        // Shape of the payload returned in result (match the "response handling" section of the page)
        type TaskAddResult = {
          task: { id: string }
        }
        
        try {
          const response = await $b24.actions.v2.call.make<TaskAddResult>({
            method: 'tasks.task.add',
            params: {
              fields: {
                TITLE: 'Task title', // Task title (required)
                DEADLINE: '2025-12-31T23:59:59', // Deadline, ISO 8601
                CREATED_BY: 456, // Creator ID
                RESPONSIBLE_ID: 123, // Responsible person ID (required)
                // Bind the task to several CRM entities via UF_CRM_TASK
                UF_CRM_TASK: ['L_4', 'C_7', 'CO_5', 'D_10'], // Lead 4 / Contact 7 / Company 5 / Deal 10
                // Attach several Drive files via UF_TASK_WEBDAV_FILES (prefix IDs with "n")
                UF_TASK_WEBDAV_FILES: ['n12345', 'n67890']
              }
            },
            requestId: Text.getUuidRfc4122() // optional unique tracking id for this request
          })
        
          // 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(`Task created with ID ${result.task.id}`)
          }
        } 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 createTask() {
            try {
              // Initialize the SDK inside a Bitrix24 frame
              const $b24 = await B24Js.initializeB24Frame()
        
              const response = await $b24.actions.v2.call.make({
                method: 'tasks.task.add',
                params: {
                  fields: {
                    TITLE: 'Task title', // Task title (required)
                    DEADLINE: '2025-12-31T23:59:59', // Deadline, ISO 8601
                    CREATED_BY: 456, // Creator ID
                    RESPONSIBLE_ID: 123, // Responsible person ID (required)
                    // Bind the task to several CRM entities via UF_CRM_TASK
                    UF_CRM_TASK: ['L_4', 'C_7', 'CO_5', 'D_10'], // Lead 4 / Contact 7 / Company 5 / Deal 10
                    // Attach several Drive files via UF_TASK_WEBDAV_FILES (prefix IDs with "n")
                    UF_TASK_WEBDAV_FILES: ['n12345', 'n67890']
                  }
                },
                requestId: B24Js.Text.getUuidRfc4122() // optional unique tracking id for this request
              })
        
              // 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(`Task created with ID ${result.task.id}`)
            } catch (error) {
              // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
              console.error(error)
            }
          }
        
          document.addEventListener('DOMContentLoaded', createTask)
        </script>
        

try {
            $response = $b24Service
                ->core
                ->call(
                    'tasks.task.add',
                    [
                        'fields' => [
                            'TITLE'         => 'Task Title',
                            'DEADLINE'      => '2025-12-31T23:59:59',
                            'CREATED_BY'    => 456,
                            'RESPONSIBLE_ID' => 123,
                            'UF_CRM_TASK'   => [
                                'L_4',
                                'C_7',
                                'CO_5',
                                'D_10',
                            ],
                            'UF_TASK_WEBDAV_FILES' => [
                                'n12345',
                                'n67890',
                            ],
                        ],
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Task successfully created with ID ' . $result['task']['id'];
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error creating task: ' . $e->getMessage();
        }
        

BX24.callMethod(
            "tasks.task.add",
            {
                fields: {               
                    TITLE: "Task Title", // Task title
                    DEADLINE: "2025-12-31T23:59:59", // Deadline
                    CREATED_BY: 456, // Creator ID
                    RESPONSIBLE_ID: 123, // Responsible person ID
                    // Example of passing multiple values in the UF_CRM_TASK field
                    UF_CRM_TASK: [
                        "L_4", // Binding to lead
                        "C_7", // Binding to contact
                        "CO_5", // Binding to company
                        "D_10" // Binding to deal
                    ],
                    // Example of passing multiple files in the UF_TASK_WEBDAV_FILES field
                    UF_TASK_WEBDAV_FILES: [
                        "n12345", // ID of the first Drive file
                        "n67890" // ID of the second Drive file
                    ]
                }
            },
            function(result) {
                if (result.error()) {
                    console.error(result.error());
                } else {
                    console.info("Task successfully created with ID " + result.data().task.id);
                }
            }
        );
        

require_once('crest.php');
        
        $result = CRest::call(
            'tasks.task.add',
            [
                'fields' => [
                    'TITLE' => 'Task Title', // Task title
                    'DEADLINE' => '2025-12-31T23:59:59', // Deadline
                    'CREATED_BY' => 456, // Creator ID
                    'RESPONSIBLE_ID' => 123, // Responsible person ID
                    // Example of passing multiple values in the UF_CRM_TASK field
                    'UF_CRM_TASK' => [
                        'L_4', // Binding to lead
                        'C_7', // Binding to contact
                        'CO_5', // Binding to company
                        'D_10' // Binding to deal
                    ],
                    // Example of passing multiple files in the UF_TASK_WEBDAV_FILES field
                    'UF_TASK_WEBDAV_FILES' => [
                        'n12345', // ID of the first Drive file
                        'n67890' // ID of the second Drive file
                    ]
                ]
            }
        );
        
        if (isset($result['error'])) {
            echo 'Error: ' . $result['error_description'];
        } else {
            echo 'Task successfully created with ID ' . $result['result']['task']['id'];
        }