Write Information to the Business Process Log bizproc.activity.log

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

Scope: bizproc

Who can execute the method: any user

This method logs information into the business process log. Event logging must be enabled in the business process template.

Method Parameters

Required parameters are marked with *

Name
type

Description

EVENT_TOKEN*
string

A unique key required to send an event to the business process.

The token is sent to the application action handler when the business process reaches this action.

Logging is possible if the USE_SUBSCRIPTION parameter is set to 'Y' during the registration or update of the action in bizproc.activity.add or bizproc.activity.update

LOG_MESSAGE*
string

Message to be logged

EVENT_TOKEN must be valid and current. If the token is invalid or expired, the method will return an access error ACCESS_DENIED.

Code Examples

How to Use Examples in Documentation

cURL (Webhook)

cURL (OAuth)

PHP

BX24.js

PHP CRest

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"event_token":"55c1dc1c3f0d75.78875596|A51601_82584_96831_81132|hsyUws1j4XiwqPqN45eH66CcQtEvpUIP.47dd5d888e8e549d2c984713e12a4268e6e87d0208ca1f093ba1075e77f92e90","log_message":"Please wait for answer!"}' \
        https://**put_your_bitrix24_address**/rest/**put_your_user_id_here**/**put_your_webhook_here**/bizproc.activity.log

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"event_token":"55c1dc1c3f0d75.78875596|A51601_82584_96831_81132|hsyUws1j4XiwqPqN45eH66CcQtEvpUIP.47dd5d888e8e549d2c984713e12a4268e6e87d0208ca1f093ba1075e77f92e90","log_message":"Please wait for answer!","auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/bizproc.activity.log

try
        {
            const response = await $b24.callMethod(
                'bizproc.activity.log',
                {
                    event_token: '55c1dc1c3f0d75.78875596|A51601_82584_96831_81132|hsyUws1j4XiwqPqN45eH66CcQtEvpUIP.47dd5d888e8e549d2c984713e12a4268e6e87d0208ca1f093ba1075e77f92e90',
                    log_message: 'Please wait for answer!'
                }
            );
            
            const result = response.getData().result;
            alert("Success: " + result);
        }
        catch( error )
        {
            alert("Error: " + error);
        }

try {
            $eventToken = 'your_event_token'; // Replace with actual event token
            $message = 'Your log message'; // Replace with actual message
        
            $result = $serviceBuilder
                ->getBizProcScope()
                ->activity()
                ->log($eventToken, $message);
        
            if ($result->isSuccess()) {
                print($result->getCoreResponse()->getResponseData()->getResult()[0]);
            } else {
                print('Log entry failed.');
            }
        } catch (Throwable $e) {
            print('Error: ' . $e->getMessage());
        }

BX24.callMethod(
            'bizproc.activity.log',
            {
                event_token: '55c1dc1c3f0d75.78875596|A51601_82584_96831_81132|hsyUws1j4XiwqPqN45eH66CcQtEvpUIP.47dd5d888e8e549d2c984713e12a4268e6e87d0208ca1f093ba1075e77f92e90',
                log_message: 'Please wait for answer!'
            },
            function(result) {
                if(result.error())
                    alert("Error: " + result.error());
                else
                    alert("Success: " + result.data());
            }
        );

require_once('crest.php');
        
        $result = CRest::call(
            'bizproc.activity.log',
            [
                'event_token' => '55c1dc1c3f0d75.78875596|A51601_82584_96831_81132|hsyUws1j4XiwqPqN45eH66CcQtEvpUIP.47dd5d888e8e549d2c984713e12a4268e6e87d0208ca1f093ba1075e77f92e90',
                'log_message' => 'Please wait for answer!'
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';

Response Handling

HTTP Status: 200

{
            "result": true,
            "time": {
                "start": 1738152146.805903,
                "finish": 1738152146.844209,
                "duration": 0.03830695152282715,
                "processing": 0.0035429000854492188,
                "date_start": "2025-01-29T15:02:26+01:00",
                "date_finish": "2025-01-29T15:02:26+01:00",
                "operating_reset_at": 1738152746,
                "operating": 0
            }
        }

Returned Data

Name `type`	Description
result `boolean`	Returns `true` if the log entry was added successfully
time `time`	Information about the request execution time

Error Handling

HTTP Status: 400

{
            "error": "ERROR_EMPTY_LOG_MESSAGE",
            "error_description": "Empty log message!"
        }

Name `type`	Description
error `string`	String error code. It may consist of digits, Latin letters, and underscores
error_description `error_description`	Textual description of the error. The description is not intended to be shown to the end user in its raw form

Possible Error Codes

Code	Error Message	Description
`ERROR_EMPTY_LOG_MESSAGE`	Empty log message!	Log entry text is not specified
`ACCESS_DENIED`	Access denied!	Invalid or expired `EVENT_TOKEN`
Depends on the business process error	Depends on the business process error	Error returned from the execution of the business process

Statuses and System Error Codes

HTTP Status: 20x, 40x, 50x

The errors described below may occur when calling any method.

Status	Code Error Message	Description
`500`	`INTERNAL_SERVER_ERROR` Internal server error	An internal server error has occurred. Please contact the server administrator or Bitrix24 technical support
`500`	`ERROR_UNEXPECTED_ANSWER` Server returned an unexpected response	An internal server error has occurred. Please contact the server administrator or Bitrix24 technical support
`503`	`QUERY_LIMIT_EXCEEDED` Too many requests	The request intensity limit has been exceeded
`405`	`ERROR_BATCH_METHOD_NOT_ALLOWED` Method is not allowed for batch usage	The current method is not permitted for calls using batch
`400`	`ERROR_BATCH_LENGTH_EXCEEDED` Max batch length exceeded	The maximum length of parameters passed to the batch method has been exceeded
`401`	`NO_AUTH_FOUND` Wrong authorization data	Invalid access token or webhook code
`400`	`INVALID_REQUEST` Https required	The HTTPS protocol is required for method calls
`503`	`OVERLOAD_LIMIT` REST API is blocked due to overload	The REST API is blocked due to overload. This is a manual individual block; please contact Bitrix24 technical support to lift it
`403`	`ACCESS_DENIED` REST API is available only on commercial plans	The REST API is only available on commercial plans
`403`	`INVALID_CREDENTIALS` Invalid request credentials	The user associated with the access token or webhook used to call the method lacks the necessary permissions
`404`	`ERROR_MANIFEST_IS_NOT_AVAILABLE` Manifest is not available	The manifest is not available
`403`	`insufficient_scope` The request requires higher privileges than provided by the webhook token	The request requires higher privileges than those provided by the webhook token
`401`	`expired_token` The access token provided has expired	The provided access token has expired
`403`	`user_access_error` The user does not have access to the application	The user does not have access to the application. This means that the application is installed, but the portal administrator has restricted access to this application to specific users only
`500`	`PORTAL_DELETED` Portal was deleted	The public part of the site is closed. To open the public part of the site on an on-premise installation, disable the "Temporary closure of the public part of the site" option. Path to the setting: Desktop > Settings > Product Settings > Module Settings > Main Module > Temporary closure of the public part of the site

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Delete Action

Overview of Methods

Write Information to the Business Process Log bizproc.activity.log

Method ParametersMethod Parameters

Code ExamplesCode Examples

Response HandlingResponse Handling

Returned DataReturned Data

Error HandlingError Handling

Possible Error CodesPossible Error Codes

Statuses and System Error CodesStatuses and System Error Codes

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