Client Change Event CallCard::EntityChanged

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: telephony

Who can subscribe: any user

The CallCard::EntityChanged event occurs when the current client in the call card changes.

The event operates within the context of the application in the CALL_CARD placement.

What the Handler Receives

Data is passed to the callback BX24.placement.bindEvent

callback({
            "PHONE_NUMBER": "+19001234567",
            "CRM_ENTITY_TYPE": "CONTACT",
            "CRM_ENTITY_ID": 123
        });

Event Handler Parameters

Required parameters are marked with *

Parameter
type

Description

PHONE_NUMBER*
string

The client's phone number

CRM_ENTITY_TYPE*
string

The type of the CRM entity associated with the call

CRM_ENTITY_ID*
integer

The identifier of the CRM entity associated with the call

Event Subscription Parameters

Required parameters are marked with *

Name
type

Description

PLACEMENT*
string

The name of the interface event.

For this event — CallCard::EntityChanged

HANDLER*
string

The URL of the event handler for calling placement.bindEvent

Code Examples

How to Use Examples in Documentation

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"PLACEMENT":"CallCard::EntityChanged","HANDLER":"**your_handler_url_here**"}' \
        "https://**put_your_bitrix24_address**/rest/placement.bindEvent?auth=**put_access_token_here**"
        
BX24.placement.bindEvent('CallCard::EntityChanged', function (eventData) {
            console.log(eventData);
        });
        
try {
            $response = $b24Service
                ->core
                ->call(
                    'placement.bindEvent',
                    [
                        'PLACEMENT' => 'CallCard::EntityChanged',
                        'HANDLER' => '**your_handler_url_here**'
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Success: ' . print_r($result, true);
            processData($result);
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error: ' . $e->getMessage();
        }
        
BX24.callMethod(
            'placement.bindEvent',
            {
                PLACEMENT: 'CallCard::EntityChanged',
                HANDLER: '**your_handler_url_here**'
            },
            function(result)
            {
                if (result.error())
                {
                    console.error(result.error(), result.error_description());
                }
                else
                {
                    console.log(result.data());
                }
            }
        );
        
require_once('crest.php');
        
        $result = CRest::call(
            'placement.bindEvent',
            [
                'PLACEMENT' => 'CallCard::EntityChanged',
                'HANDLER' => '**your_handler_url_here**'
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';

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