Delete File Attachment from Task task.item.deletefile

If you are developing integrations for Bitrix24 using AI tools (Codex, Claude Code, Cursor), connect to the MCP server so that the assistant can utilize the official REST documentation.

Scope: task

Who can execute the method: any user

DEPRECATED

The development of this method has been halted. Please use tasks.task.update.

This method removes the file attachment from a task.

Method Parameters

Name

Description

auth

Authorization token

TASK_ID

Task identifier

ATTACHMENT_ID

Identifier of the attached file

Code Examples

How to Use Examples in Documentation

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASK_ID":3,"ATTACHMENT_ID":28}' \
        https://your-domain.com/rest/**put_your_user_id_here**/**put_your_webhook_here**/task.item.deletefile
        
curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASK_ID":3,"ATTACHMENT_ID":28,"auth":"1iqeuq94vzfxu01bouws3voja2lsezfq"}' \
        https://your-domain.com/rest/task.item.deletefile
        
try
        {
            const response = await $b24.callMethod(
                'task.item.deletefile',
                {
                    TASK_ID: 3,
                    ATTACHMENT_ID: 28
                }
            );
            
            const result = response.getData().result;
            console.log(result);
        }
        catch( error )
        {
            console.error(error);
        }
        
try {
            $response = $b24Service
                ->core
                ->call(
                    'task.item.deletefile',
                    [
                        'TASK_ID'       => 3,
                        'ATTACHMENT_ID' => 28
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            if ($result->error()) {
                error_log($result->error());
            } else {
                echo 'Success: ' . print_r($result->data(), true);
            }
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error deleting file: ' . $e->getMessage();
        }
        
BX24.callMethod(
            'task.item.deletefile',
            {
                TASK_ID: 3,
                ATTACHMENT_ID: 28
            },
            function(result) {
                if(result.error())
                    console.error(result.error());
                else
                    console.log(result.data());
            }
        );
        
require_once('crest.php');
        
        $result = CRest::call(
            'task.item.deletefile',
            [
                'TASK_ID' => 3,
                'ATTACHMENT_ID' => 28
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';
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