Event Handler

Quick navigation: all methods and events

Events in Bitrix24 are notifications about data changes, such as the creation of a deal or the deletion of a product. When an application or webhook subscribes to an event, the system starts generating these notifications for it. To receive events, set up a handler.

An event handler is an external URL to which Bitrix24 sends a POST request with data about the change. The handler allows you to:

• synchronize data with an external system,
• trigger automated scenarios,
• validate data according to business logic rules.

How Events WorkHow Events Work

1. The application registers a handler for the desired event using the event.bind method.
2. The user performs an action in Bitrix24, such as modifying a task.
3. Bitrix24 sends a notification to the application via the queue server.

Features of OperationFeatures of Operation

Events are not processed directly. First, Bitrix24 queues the event on a special server. From there, a POST request is sent to your handler. As a result, the request may arrive with a slight delay.

The server checks the response speed of the handler. If the handler responds slowly, the server reduces the frequency of calls. The intervals between requests increase.

Current queue server addresses.

What Comes to the HandlerWhat Comes to the Handler

The system sends a request with content-type application/x-www-form-urlencoded. The main keys are:

• event — the name of the event,
• ts — a timestamp in Unix timestamp format,
• data — event data, such as the identifier of the modified element,
• auth — authorization parameters, including OAuth 2.0 tokens.

Example request:

array(
            'event' => 'ONAPPINSTALL',
            'data' => array(
                'VERSION' => '1',
                'LANGUAGE_ID' => 'de',
            ),
            'ts' => '1466439714',
            'auth' => array(
                'access_token' => 's6p6eclrvim6da22ft9ch94ekreb52lv',
                'expires_in' => '3600',
                'scope' => 'entity,im',
                'domain' => 'portal.bitrix24.com',
                'server_endpoint' => 'https://oauth.bitrix.info/rest/',
                'status' => 'F',
                'client_endpoint' => 'https://portal.bitrix24.com/rest/',
                'member_id' => 'a223c6b3710f85df22e9377d6c4f7553',
                'refresh_token' => '4s386p3q0tr8dy89xvmt96234v3dljg8',
                'application_token' => '51856fefc120afa4b628cc82d3935cce',
            ),
        )
        

Authorization TokensAuthorization Tokens

OAuth 2.0 tokens in the request are tied to the user who performed the action. If the event is triggered automatically, for example, by an automation rule or workflow, the user ID will be 0. In this case, tokens are not passed to the handler.

To ensure that the application can always make callbacks to Bitrix24, save the tokens of the user who installed the application. Use these tokens for any subsequent requests on behalf of the application.

How to Subscribe to an Event via WebhookHow to Subscribe to an Event via Webhook

1. In Bitrix24, go to Developer resources > Other > Outbound webhook.
2. Specify the handler URL.
3. Select one or more events from the list, such as OnCrmDealAdd.
4. Save the webhook. The Application Token field will be generated automatically.

Example request:

{
            "event": "ONCRMDEALADD",
            "event_handler_id": "975",
            "data": {
                "FIELDS": {
                "ID": "7405"
                }
            },
            "ts": "1766047124",
            "auth": {
                "domain": "portal.bitrix24.com",
                "client_endpoint": "https://portal.bitrix24.com/rest/",
                "server_endpoint": "https://oauth.bitrix.info/rest/",
                "member_id": "d897063e1ce7c5eb9f04b9751eef5915",
                "application_token": "jvh9y1ulvt2m6k5or90v9mg8nn32ozas"
            }
        }
        

Note that the request from the outgoing webhook does not include user OAuth 2.0 tokens.

Event LimitationsEvent Limitations

Events have two main limitations:

1. Load cannot be regulated. When mass data changes occur, you will receive many consecutive calls. If a thousand deals are changed simultaneously in Bitrix24, the handler will receive a thousand calls.
2. No retries. If your server does not respond or returns an error, the Bitrix24 queue server will log the failure but will not resend the event.

If it is important to process all events without loss, use offline events. They allow you to retrieve events from the queue manually.

Overview of Methods and EventsOverview of Methods and Events

Continue LearningContinue Learning

• Security in Handlers
• Offline Events
• Required Network Access