Upload File to Task task.item.addfile

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.files.attach.

This method uploads a file to a task. Currently, file upload is implemented via post, with the file content passed in the CONTENT parameter.

Method Parameters

Name
type

Description

TASK_ID

Task identifier

NAME
string

File name

CONTENT

File content in base64 format

Code Examples

How to Use Examples in Documentation

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASK_ID":"140","FILE":{"NAME":"desc.txt","CONTENT":"BASE64_ENCODED_CONTENT_OF_DESC.TXT"}}' \
        https://**put_your_bitrix24_address**/rest/**put_your_user_id_here**/**put_your_webhook_here**/task.item.addfile
        
curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASK_ID":"140","FILE":{"NAME":"desc.txt","CONTENT":"BASE64_ENCODED_CONTENT_OF_DESC.TXT"},"auth":"z3eamwwkpgl7u18kx14q1s4c0ffckqsn"}' \
        https://**put_your_bitrix24_address**/rest/task.item.addfile
        
try
        {
        	const response = await $b24.callMethod(
        		"task.item.addfile",
        		{
        			TASK_ID: "140",
        			FILE: {
        				NAME: "desc.txt",
        				CONTENT: "BASE64_ENCODED_CONTENT_OF_DESC.TXT"
        			}
        		}
        	);
        	
        	const result = response.getData().result;
        	console.log(result);
        }
        catch( error )
        {
        	console.error(error);
        }
        
try {
            $response = $b24Service
                ->core
                ->call(
                    'task.item.addfile',
                    [
                        'TASK_ID' => '140',
                        'FILE'    => [
                            'NAME'    => 'desc.txt',
                            'CONTENT' => 'BASE64_ENCODED_CONTENT_OF_DESC.TXT',
                        ],
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            if ($result->error()) {
                error_log($result->error());
                echo 'Error: ' . $result->error();
            } else {
                echo 'Success: ' . print_r($result->data(), true);
            }
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error adding file to task: ' . $e->getMessage();
        }
        
BX24.callMethod(
            "task.item.addfile",
            {
                TASK_ID: "140",
                FILE: {
                    NAME: "desc.txt",
                    CONTENT: "BASE64_ENCODED_CONTENT_OF_DESC.TXT"
                }
            },
            function(result) {
                if(result.error())
                    console.error(result.error());
                else
                    console.log(result.data());
            }
        );
        
require_once('crest.php');
        
        $result = CRest::call(
            'task.item.addfile',
            [
                'TASK_ID' => "140",
                'FILE' => [
                    'NAME' => 'desc.txt',
                    'CONTENT' => base64_encode(file_get_contents($_SERVER['DOCUMENT_ROOT'] .'/desc.txt'))
                ]
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';
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