api2app-chat-widget

Embed code:

<script src="https://andchir.github.io/api2app-chat-widget/api2app-chat-widget.js"></script>
<script>
    const chatWidget = new Api2AppChatWidget(
        'https://api2app.org/ru/apps/embed/your-app-embed-id', {
            buttonColor: '#007bff',
            hoverColor: '#0056b3',
            position: 'bottom-right', // bottom-right, bottom-left, top-right, top-left
            useBackDrop: true,
            width: 350,
            height: 465
        });
</script>