diff --git a/.changeset/curvy-pets-report.md b/.changeset/curvy-pets-report.md
new file mode 100644
index 0000000..f40b39f
--- /dev/null
+++ b/.changeset/curvy-pets-report.md
@@ -0,0 +1,5 @@
+---
+"@livechat/agent-app-sdk": minor
+---
+
+[DPS-4294] extend `page_data` event for Fullscreen apps
diff --git a/packages/agent-app-sdk/README.md b/packages/agent-app-sdk/README.md
index 818f103..9b74568 100644
--- a/packages/agent-app-sdk/README.md
+++ b/packages/agent-app-sdk/README.md
@@ -239,7 +239,15 @@ Gets the customer profile recorded most recently. Returns the `ICustomerProfile`
 
 ### Events
 
-This widget currently does not support any events.
+#### `page_data`
+
+Emitted when widget in initialized. The handler will get the main window page data object as an argument:
+
+```ts
+interface IPageData {
+  queryParams: object;
+}
+```
 
 ### Methods
 
@@ -255,6 +263,10 @@ Navigates LiveChat Agent App to given pathname.
 
 Updates "Reports" section filters to given `filters` object.
 
+#### `getPageData(): IPageData | null`
+
+Gets the main window page data recorded most recently. Returns the `IPageData` object, which is identical to the one emitted by the `page_data` event or `null` (if no data were registered).
+
 ## Settings widget (`ISettingsWidget`)
 
 ### Events
diff --git a/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.spec.ts b/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.spec.ts
index 40c532c..2d9b5d5 100644
--- a/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.spec.ts
+++ b/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.spec.ts
@@ -18,6 +18,15 @@ jest.mock('@livechat/widget-core-sdk', () => {
   };
 });
 
+jest.mock('../shared/page-data', () => {
+  return {
+    withPageData: jest.fn().mockImplementation(widget => ({
+      ...widget,
+      getPageData: jest.fn()
+    }))
+  };
+});
+
 describe('FullscreenWidget', () => {
   it('has a `setNotificationBadge` method', () => {
     const connection = createMockConnection();
@@ -108,12 +117,13 @@ describe('createFullscreenWidget', () => {
   });
 
   it('returns the correct object with correct properties', async () => {
-    expect.assertions(4);
+    expect.assertions(5);
 
     const widget = await createFullscreenWidget();
     expect(widget).toHaveProperty('setNotificationBadge');
     expect(widget).toHaveProperty('on');
     expect(widget).toHaveProperty('off');
     expect(widget).toHaveProperty('sendMessage');
+    expect(widget).toHaveProperty('getPageData');
   });
 });
diff --git a/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.ts b/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.ts
index 93c7aae..3e2dbe4 100644
--- a/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.ts
+++ b/packages/agent-app-sdk/src/widgets/fullscreen/fullscreen-widget.ts
@@ -9,6 +9,7 @@ import {
   IFullscreenWidgetEvents,
   ReportsFilters
 } from './interfaces';
+import { withPageData } from '../shared/page-data';
 
 export { ReportsFilters } from './interfaces';
 
@@ -35,13 +36,17 @@ export function FullscreenWidget(
       }
     }
   );
-  return withAmplitude(base);
+  return withAmplitude(withPageData(base));
 }
 
 export type IFullscreenWidget = ReturnType<typeof FullscreenWidget>;
 
 export default function createFullscreenWidget(): Promise<IFullscreenWidget> {
-  return createConnection<IFullscreenWidgetEvents>().then(connection =>
-    FullscreenWidget(connection)
-  );
+  let widget: IFullscreenWidget;
+  return createConnection<IFullscreenWidgetEvents>()
+    .then(connection => {
+      widget = FullscreenWidget(connection);
+      return connection.sendMessage('plugin_inited');
+    })
+    .then(() => widget);
 }