diff --git a/src/types.ts b/src/types.ts
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+export type AppExtensionTarget = "POPUP" | "APP_PAGE";
+
+export type AppExtensionMount =
+  | "PRODUCT_DETAILS_MORE_ACTIONS"
+  | "PRODUCT_OVERVIEW_CREATE"
+  | "PRODUCT_OVERVIEW_MORE_ACTIONS"
+  | "NAVIGATION_CATALOG"
+  | "NAVIGATION_ORDERS"
+  | "NAVIGATION_CUSTOMERS"
+  | "NAVIGATION_DISCOUNTS"
+  | "NAVIGATION_TRANSLATIONS"
+  | "NAVIGATION_PAGES"
+  | "ORDER_DETAILS_MORE_ACTIONS"
+  | "ORDER_OVERVIEW_CREATE"
+  | "ORDER_OVERVIEW_MORE_ACTIONS";
+
+export type AppPermission =
+  | "HANDLE_PAYMENTS"
+  | "HANDLE_CHECKOUTS"
+  | "MANAGE_APPS"
+  | "MANAGE_CHECKOUTS"
+  | "MANAGE_DISCOUNTS"
+  | "MANAGE_GIFT_CARD"
+  | "MANAGE_MENUS"
+  | "MANAGE_ORDERS"
+  | "MANAGE_PAGES"
+  | "MANAGE_PLUGINS"
+  | "MANAGE_PRODUCT_TYPES_AND_ATTRIBUTES"
+  | "MANAGE_PRODUCTS"
+  | "MANAGE_SETTINGS"
+  | "MANAGE_SHIPPING"
+  | "MANAGE_STAFF"
+  | "MANAGE_TRANSLATIONS"
+  | "MANAGE_USERS";
+
+export type WebhookEvent = string;
+
+export interface AppExtension {
+  /** Name which will be displayed in the dashboard */
+  label: string;
+  /** the place where the extension will be mounted */
+  mount: AppExtensionMount;
+  /** Method of presenting the interface
+    `POPUP` will present the interface in a modal overlay
+    `APP_PAGE` will navigate to the application page
+    @default `POPUP`
+  */
+  target: AppExtensionTarget;
+  permissions: AppPermission[];
+  /** URL of the view to display;
+    you can skip the domain and protocol when target is set to `APP_PAGE`, or when your manifest defines an `appUrl`.
+
+    When target is set to `POPUP`, the url will be used to render an `<iframe>`.
+   */
+  url: string;
+}
+
+export interface AppWebhook {
+  name: string;
+  events?: WebhookEvent[];
+  query: string;
+  targetUrl: string;
+  isActive?: boolean;
+}
+
+export interface AppManifest {
+  /** ID of the application used internally by Saleor */
+  id: string;
+  version: string;
+  /** App's name displayed in the dashboard */
+  name: string;
+  /** Description of the app displayed in the dashboard */
+  about?: string;
+  /** Array of permissions requested by the app */
+  permissions: AppPermission[];
+  /** App website rendered in the dashboard */
+  appUrl: string;
+  /** Address to the app configuration page, which is rendered in the dashboard
+    @deprecated in Saleor 3.5, use appUrl instead
+  */
+  configurationUrl?: string;
+  /** Endpoint used during process of app installation
+
+    @see [Installing an app](https://docs.saleor.io/docs/3.x/developer/extending/apps/installing-apps#installing-an-app) 
+  */
+  tokenTargetUrl: string;
+  /** Short description of privacy policy displayed in the dashboard
+
+    @deprecated in Saleor 3.5, use dataPrivacyUrl instead
+  */
+  dataPrivacy?: string;
+  /** URL to the full privacy policy */
+  dataPrivacyUrl?: string;
+  /**  External URL to the app homepage */
+  homepageUrl?: string;
+  /** External URL to the page where app users can find support */
+  supportUrl?: string;
+  /** List of extensions that will be mounted in Saleor's dashboard
+
+  @see For details, please see the [extension section](https://docs.saleor.io/docs/3.x/developer/extending/apps/extending-dashboard-with-apps#key-concepts)
+  */
+  extensions?: AppExtension[];
+  /** List of webhooks that will be set.
+  
+  @see For details, please look at [asynchronous webhooks](https://docs.saleor.io/docs/3.x/developer/extending/apps/asynchronous-webhooks),
+  [synchronous-webhooks](https://docs.saleor.io/docs/3.x/developer/extending/apps/synchronous-webhooks/key-concepts)
+  and [webhooks' subscription](https://docs.saleor.io/docs/3.x/developer/extending/apps/subscription-webhook-payloads)
+
+  Be aware that subscription queries are required in manifest sections
+  */
+  webhooks?: AppWebhook[];
+}