diff --git a/app/javascript/mastodon/actions/notification_groups.ts b/app/javascript/mastodon/actions/notification_groups.ts
new file mode 100644
index 0000000000..b804148eeb
--- /dev/null
+++ b/app/javascript/mastodon/actions/notification_groups.ts
@@ -0,0 +1,36 @@
+import { apiFetchNotifications } from 'mastodon/api/notifications';
+import type { ApiAccountJSON } from 'mastodon/api_types/accounts';
+import type { ApiStatusJSON } from 'mastodon/api_types/statuses';
+import { createDataLoadingThunk } from 'mastodon/store/typed_functions';
+
+import { importFetchedAccounts, importFetchedStatuses } from './importer';
+
+export const fetchNotifications = createDataLoadingThunk(
+  'notificationGroups/fetch',
+  apiFetchNotifications,
+  (notifications, { dispatch }) => {
+    const fetchedAccounts: ApiAccountJSON[] = [];
+    const fetchedStatuses: ApiStatusJSON[] = [];
+
+    notifications.forEach((notification) => {
+      if ('sample_accounts' in notification) {
+        fetchedAccounts.push(...notification.sample_accounts);
+      }
+
+      // if (notification.type === 'admin.report') {
+      //   fetchedAccounts.push(...notification.report.target_account);
+      // }
+
+      if ('target_status' in notification) {
+        fetchedStatuses.push(notification.target_status);
+      }
+    });
+
+    if (fetchedAccounts.length > 0)
+      dispatch(importFetchedAccounts(fetchedAccounts));
+
+    if (fetchedStatuses.length > 0) importFetchedStatuses(fetchedStatuses);
+
+    // dispatch(submitMarkers());
+  },
+);
diff --git a/app/javascript/mastodon/api/notifications.ts b/app/javascript/mastodon/api/notifications.ts
new file mode 100644
index 0000000000..a32520de79
--- /dev/null
+++ b/app/javascript/mastodon/api/notifications.ts
@@ -0,0 +1,6 @@
+import { apiRequest } from 'mastodon/api';
+import type { NotificationGroupJSON } from 'mastodon/api_types/notifications';
+
+export const apiFetchNotifications = () => {
+  return apiRequest<NotificationGroupJSON[]>('GET', '/v2_alpha/notifications');
+};
diff --git a/app/javascript/mastodon/api_types/notifications.ts b/app/javascript/mastodon/api_types/notifications.ts
new file mode 100644
index 0000000000..53dd68227b
--- /dev/null
+++ b/app/javascript/mastodon/api_types/notifications.ts
@@ -0,0 +1,60 @@
+// See app/serializers/rest/notification_group_serializer.rb
+
+import type { ApiAccountJSON } from './accounts';
+import type { ApiStatusJSON } from './statuses';
+
+// See app/model/notification.rb
+export type NotificationWithStatusType =
+  | 'favourite'
+  | 'reblog'
+  | 'status'
+  | 'mention'
+  | 'poll'
+  | 'update';
+
+export type NotificationType =
+  | NotificationWithStatusType
+  | 'follow'
+  | 'follow_request'
+  | 'moderation_warning'
+  | 'severed_relationships'
+  | 'admin.sign_up'
+  | 'admin.report';
+
+export interface BaseNotificationGroupJSON {
+  group_key: string;
+  notifications_count: number;
+  type: NotificationType;
+  sample_accounts: ApiAccountJSON[];
+  latest_page_notification_at?: string;
+  page_min_id?: string;
+  page_max_id?: string;
+}
+
+interface NotificationGroupWithStatusJSON extends BaseNotificationGroupJSON {
+  type: NotificationWithStatusType;
+  target_status: ApiStatusJSON;
+}
+
+interface ReportNotificationGroupJSON extends BaseNotificationGroupJSON {
+  type: 'admin.report';
+  report: unknown;
+}
+
+interface ModerationWarningNotificationGroupJSON
+  extends BaseNotificationGroupJSON {
+  type: 'moderation_warning';
+  moderation_warning: unknown;
+}
+
+interface AccountRelationshipSeveranceNotificationGroupJSON
+  extends BaseNotificationGroupJSON {
+  type: 'severed_relationships';
+  account_relationship_severance_event: unknown;
+}
+
+export type NotificationGroupJSON =
+  | ReportNotificationGroupJSON
+  | AccountRelationshipSeveranceNotificationGroupJSON
+  | NotificationGroupWithStatusJSON
+  | ModerationWarningNotificationGroupJSON;
diff --git a/app/javascript/mastodon/models/notification_group.ts b/app/javascript/mastodon/models/notification_group.ts
new file mode 100644
index 0000000000..da2c5f5f61
--- /dev/null
+++ b/app/javascript/mastodon/models/notification_group.ts
@@ -0,0 +1,59 @@
+import type {
+  BaseNotificationGroupJSON,
+  NotificationGroupJSON,
+  NotificationType,
+  NotificationWithStatusType,
+} from 'mastodon/api_types/notifications';
+import type { ApiStatusJSON } from 'mastodon/api_types/statuses';
+
+type BaseNotificationGroup = BaseNotificationGroupJSON;
+
+interface BaseNotificationWithStatus<Type extends NotificationWithStatusType>
+  extends BaseNotificationGroup {
+  type: Type;
+  status: ApiStatusJSON;
+}
+
+interface BaseNotification<Type extends NotificationType>
+  extends BaseNotificationGroup {
+  type: Type;
+}
+
+export type NotificationGroupFavourite =
+  BaseNotificationWithStatus<'favourite'>;
+export type NotificationGroupReblog = BaseNotificationWithStatus<'reblog'>;
+export type NotificationGroupStatus = BaseNotificationWithStatus<'status'>;
+export type NotificationGroupMention = BaseNotificationWithStatus<'mention'>;
+export type NotificationGroupPoll = BaseNotificationWithStatus<'poll'>;
+export type NotificationGroupUpdate = BaseNotificationWithStatus<'update'>;
+export type NotificationGroupFollow = BaseNotification<'follow'>;
+export type NotificationGroupFollowRequest = BaseNotification<'follow_request'>;
+export type NotificationGroupAdminSignUp = BaseNotification<'admin.sign_up'>;
+
+// TODO: those two will need special types
+export type NotificationGroupModerationWarning =
+  BaseNotification<'moderation_warning'>;
+export type NotificationGroupAdminReport = BaseNotification<'admin.report'>;
+export type NotificationGroupSeveredRelationships =
+  BaseNotification<'severed_relationships'>;
+
+export type NotificationGroup =
+  | NotificationGroupFavourite
+  | NotificationGroupReblog
+  | NotificationGroupStatus
+  | NotificationGroupMention
+  | NotificationGroupPoll
+  | NotificationGroupUpdate
+  | NotificationGroupFollow
+  | NotificationGroupFollowRequest
+  | NotificationGroupModerationWarning
+  | NotificationGroupSeveredRelationships
+  | NotificationGroupAdminSignUp
+  | NotificationGroupAdminReport;
+
+export function createNotificationGroupFromJSON(
+  groupJson: NotificationGroupJSON,
+): NotificationGroup {
+  // @ts-expect-error -- FIXME: properly convert the special notifications here
+  return groupJson;
+}
diff --git a/app/javascript/mastodon/reducers/notifications_groups.ts b/app/javascript/mastodon/reducers/notifications_groups.ts
new file mode 100644
index 0000000000..13b9c74ebe
--- /dev/null
+++ b/app/javascript/mastodon/reducers/notifications_groups.ts
@@ -0,0 +1,26 @@
+import { createReducer } from '@reduxjs/toolkit';
+
+import { fetchNotifications } from 'mastodon/actions/notification_groups';
+import { createNotificationGroupFromJSON } from 'mastodon/models/notification_group';
+import type { NotificationGroup } from 'mastodon/models/notification_group';
+
+interface NotificationGroupsState {
+  groups: NotificationGroup[];
+  unread: number;
+}
+
+const initialState: NotificationGroupsState = {
+  groups: [],
+  unread: 0,
+};
+
+export const notificationGroupsReducer = createReducer(
+  initialState,
+  (builder) => {
+    builder.addCase(fetchNotifications.fulfilled, (state, action) => {
+      state.groups = action.payload.map((json) =>
+        createNotificationGroupFromJSON(json),
+      );
+    });
+  },
+);