diff --git a/.changeset/ninety-hounds-exist.md b/.changeset/ninety-hounds-exist.md
new file mode 100644
index 000000000000..99882de12018
--- /dev/null
+++ b/.changeset/ninety-hounds-exist.md
@@ -0,0 +1,7 @@
+---
+'@rocket.chat/rest-typings': patch
+'@rocket.chat/meteor': patch
+'@rocket.chat/i18n': patch
+---
+
+Fix: Show correct user info actions for non-members in channels.
diff --git a/apps/meteor/app/api/server/v1/rooms.ts b/apps/meteor/app/api/server/v1/rooms.ts
index e3296b98ef17..17ef75b74574 100644
--- a/apps/meteor/app/api/server/v1/rooms.ts
+++ b/apps/meteor/app/api/server/v1/rooms.ts
@@ -1,8 +1,14 @@
 import { Media } from '@rocket.chat/core-services';
 import type { IRoom, IUpload } from '@rocket.chat/core-typings';
-import { Messages, Rooms, Users, Uploads } from '@rocket.chat/models';
+import { Messages, Rooms, Users, Uploads, Subscriptions } from '@rocket.chat/models';
 import type { Notifications } from '@rocket.chat/rest-typings';
-import { isGETRoomsNameExists, isRoomsImagesProps, isRoomsMuteUnmuteUserProps, isRoomsExportProps } from '@rocket.chat/rest-typings';
+import {
+	isGETRoomsNameExists,
+	isRoomsImagesProps,
+	isRoomsMuteUnmuteUserProps,
+	isRoomsExportProps,
+	isRoomsIsMemberProps,
+} from '@rocket.chat/rest-typings';
 import { Meteor } from 'meteor/meteor';
 
 import { isTruthy } from '../../../../lib/isTruthy';
@@ -783,6 +789,36 @@ API.v1.addRoute(
 	},
 );
 
+API.v1.addRoute(
+	'rooms.isMember',
+	{
+		authRequired: true,
+		validateParams: isRoomsIsMemberProps,
+	},
+	{
+		async get() {
+			const { roomId, userId, username } = this.queryParams;
+			const [room, user] = await Promise.all([
+				findRoomByIdOrName({
+					params: { roomId },
+				}) as Promise<IRoom>,
+				Users.findOneByIdOrUsername(userId || username),
+			]);
+
+			if (!user?._id) {
+				return API.v1.failure('error-user-not-found');
+			}
+
+			if (await canAccessRoomAsync(room, { _id: this.user._id })) {
+				return API.v1.success({
+					isMember: (await Subscriptions.countByRoomIdAndUserId(room._id, user._id)) > 0,
+				});
+			}
+			return API.v1.unauthorized();
+		},
+	},
+);
+
 API.v1.addRoute(
 	'rooms.muteUser',
 	{ authRequired: true, validateParams: isRoomsMuteUnmuteUserProps },
diff --git a/apps/meteor/client/views/hooks/useMemberExists.ts b/apps/meteor/client/views/hooks/useMemberExists.ts
new file mode 100644
index 000000000000..f737ea6c4e94
--- /dev/null
+++ b/apps/meteor/client/views/hooks/useMemberExists.ts
@@ -0,0 +1,10 @@
+import { useEndpoint } from '@rocket.chat/ui-contexts';
+import { useQuery } from '@tanstack/react-query';
+
+type UseMemberExistsProps = { roomId: string; username: string };
+
+export const useMemberExists = ({ roomId, username }: UseMemberExistsProps) => {
+	const checkMember = useEndpoint('GET', '/v1/rooms.isMember');
+
+	return useQuery(['rooms/isMember', roomId, username], () => checkMember({ roomId, username }));
+};
diff --git a/apps/meteor/client/views/room/UserCard/UserCardWithData.tsx b/apps/meteor/client/views/room/UserCard/UserCardWithData.tsx
index da9f9bb19035..a12e9a143cc2 100644
--- a/apps/meteor/client/views/room/UserCard/UserCardWithData.tsx
+++ b/apps/meteor/client/views/room/UserCard/UserCardWithData.tsx
@@ -10,6 +10,7 @@ import LocalTime from '../../../components/LocalTime';
 import { UserCard, UserCardAction, UserCardRole, UserCardSkeleton } from '../../../components/UserCard';
 import { ReactiveUserStatus } from '../../../components/UserStatus';
 import { useUserInfoQuery } from '../../../hooks/useUserInfoQuery';
+import { useMemberExists } from '../../hooks/useMemberExists';
 import { useUserInfoActions } from '../hooks/useUserInfoActions';
 
 type UserCardWithDataProps = {
@@ -24,7 +25,16 @@ const UserCardWithData = ({ username, rid, onOpenUserInfo, onClose }: UserCardWi
 	const getRoles = useRolesDescription();
 	const showRealNames = Boolean(useSetting('UI_Use_Real_Name'));
 
-	const { data, isLoading } = useUserInfoQuery({ username });
+	const { data, isLoading: isUserInfoLoading } = useUserInfoQuery({ username });
+	const {
+		data: isMemberData,
+		refetch,
+		isSuccess: membershipCheckSuccess,
+		isLoading: isMembershipStatusLoading,
+	} = useMemberExists({ roomId: rid, username });
+
+	const isLoading = isUserInfoLoading || isMembershipStatusLoading;
+	const isMember = membershipCheckSuccess && isMemberData?.isMember;
 
 	const user = useMemo(() => {
 		const defaultValue = isLoading ? undefined : null;
@@ -62,6 +72,9 @@ const UserCardWithData = ({ username, rid, onOpenUserInfo, onClose }: UserCardWi
 	const { actions: actionsDefinition, menuActions: menuOptions } = useUserInfoActions(
 		{ _id: user._id ?? '', username: user.username, name: user.name },
 		rid,
+		refetch,
+		undefined,
+		isMember,
 	);
 
 	const menu = useMemo(() => {
diff --git a/apps/meteor/client/views/room/contextualBar/RoomMembers/RoomMembersActions.tsx b/apps/meteor/client/views/room/contextualBar/RoomMembers/RoomMembersActions.tsx
index 78d61d9e9f6e..7df7c468bb01 100644
--- a/apps/meteor/client/views/room/contextualBar/RoomMembers/RoomMembersActions.tsx
+++ b/apps/meteor/client/views/room/contextualBar/RoomMembers/RoomMembersActions.tsx
@@ -16,7 +16,7 @@ type RoomMembersActionsProps = {
 
 const RoomMembersActions = ({ username, _id, name, rid, reload }: RoomMembersActionsProps): ReactElement | null => {
 	const t = useTranslation();
-	const { menuActions: menuOptions } = useUserInfoActions({ _id, username, name }, rid, reload, 0);
+	const { menuActions: menuOptions } = useUserInfoActions({ _id, username, name }, rid, reload, 0, true);
 	if (!menuOptions) {
 		return null;
 	}
diff --git a/apps/meteor/client/views/room/contextualBar/UserInfo/UserInfoActions.tsx b/apps/meteor/client/views/room/contextualBar/UserInfo/UserInfoActions.tsx
index 25761539f532..0b4f30fb1f29 100644
--- a/apps/meteor/client/views/room/contextualBar/UserInfo/UserInfoActions.tsx
+++ b/apps/meteor/client/views/room/contextualBar/UserInfo/UserInfoActions.tsx
@@ -1,12 +1,13 @@
 /* eslint-disable react/display-name, react/no-multi-comp */
 import type { IRoom, IUser } from '@rocket.chat/core-typings';
-import { ButtonGroup, IconButton } from '@rocket.chat/fuselage';
+import { ButtonGroup, IconButton, Skeleton } from '@rocket.chat/fuselage';
 import { useTranslation } from '@rocket.chat/ui-contexts';
 import type { ReactElement } from 'react';
 import React, { useMemo } from 'react';
 
 import GenericMenu from '../../../../components/GenericMenu/GenericMenu';
 import { UserInfoAction } from '../../../../components/UserInfo';
+import { useMemberExists } from '../../../hooks/useMemberExists';
 import { useUserInfoActions } from '../../hooks/useUserInfoActions';
 
 type UserInfoActionsProps = {
@@ -17,10 +18,24 @@ type UserInfoActionsProps = {
 
 const UserInfoActions = ({ user, rid, backToList }: UserInfoActionsProps): ReactElement => {
 	const t = useTranslation();
+	const {
+		data: isMemberData,
+		refetch,
+		isSuccess: membershipCheckSuccess,
+		isLoading,
+	} = useMemberExists({ roomId: rid, username: user.username as string });
+
+	const isMember = membershipCheckSuccess && isMemberData?.isMember;
+
 	const { actions: actionsDefinition, menuActions: menuOptions } = useUserInfoActions(
 		{ _id: user._id, username: user.username, name: user.name },
 		rid,
-		backToList,
+		() => {
+			backToList?.();
+			refetch();
+		},
+		undefined,
+		isMember,
 	);
 
 	const menu = useMemo(() => {
@@ -51,6 +66,9 @@ const UserInfoActions = ({ user, rid, backToList }: UserInfoActionsProps): React
 		return [...actionsDefinition.map(mapAction), menu].filter(Boolean);
 	}, [actionsDefinition, menu]);
 
+	if (isLoading) {
+		return <Skeleton w='full' />;
+	}
 	return <ButtonGroup align='center'>{actions}</ButtonGroup>;
 };
 
diff --git a/apps/meteor/client/views/room/hooks/useUserInfoActions/actions/useAddUserAction.tsx b/apps/meteor/client/views/room/hooks/useUserInfoActions/actions/useAddUserAction.tsx
new file mode 100644
index 000000000000..42388b100d41
--- /dev/null
+++ b/apps/meteor/client/views/room/hooks/useUserInfoActions/actions/useAddUserAction.tsx
@@ -0,0 +1,95 @@
+import type { IRoom, IUser } from '@rocket.chat/core-typings';
+import { isRoomFederated } from '@rocket.chat/core-typings';
+import { useEffectEvent } from '@rocket.chat/fuselage-hooks';
+import {
+	useTranslation,
+	useUser,
+	useUserRoom,
+	useUserSubscription,
+	useToastMessageDispatch,
+	useAtLeastOnePermission,
+	useEndpoint,
+} from '@rocket.chat/ui-contexts';
+import { useMemo } from 'react';
+
+import * as Federation from '../../../../../lib/federation/Federation';
+import { useAddMatrixUsers } from '../../../contextualBar/RoomMembers/AddUsers/AddMatrixUsers/useAddMatrixUsers';
+import { getRoomDirectives } from '../../../lib/getRoomDirectives';
+import type { UserInfoAction } from '../useUserInfoActions';
+
+const inviteUserEndpoints = {
+	c: '/v1/channels.invite',
+	p: '/v1/groups.invite',
+} as const;
+
+export const useAddUserAction = (
+	user: Pick<IUser, '_id' | 'username'>,
+	rid: IRoom['_id'],
+	reload?: () => void,
+): UserInfoAction | undefined => {
+	const t = useTranslation();
+	const room = useUserRoom(rid);
+	const currentUser = useUser();
+	const subscription = useUserSubscription(rid);
+	const dispatchToastMessage = useToastMessageDispatch();
+
+	const { username, _id: uid } = user;
+
+	if (!room) {
+		throw Error('Room not provided');
+	}
+
+	const hasPermissionToAddUsers = useAtLeastOnePermission(
+		useMemo(() => [room?.t === 'p' ? 'add-user-to-any-p-room' : 'add-user-to-any-c-room', 'add-user-to-joined-room'], [room?.t]),
+		rid,
+	);
+
+	const userCanAdd =
+		room && user && isRoomFederated(room)
+			? Federation.isEditableByTheUser(currentUser || undefined, room, subscription)
+			: hasPermissionToAddUsers;
+
+	const { roomCanInvite } = getRoomDirectives({ room, showingUserId: uid, userSubscription: subscription });
+
+	const inviteUser = useEndpoint('POST', inviteUserEndpoints[room.t === 'p' ? 'p' : 'c']);
+
+	const handleAddUser = useEffectEvent(async ({ users }) => {
+		const [username] = users;
+		await inviteUser({ roomId: rid, username });
+		reload?.();
+	});
+
+	const addClickHandler = useAddMatrixUsers();
+
+	const addUserOptionAction = useEffectEvent(async () => {
+		try {
+			const users = [username as string];
+			if (isRoomFederated(room)) {
+				addClickHandler.mutate({
+					users,
+					handleSave: handleAddUser,
+				});
+			} else {
+				await handleAddUser({ users });
+			}
+			dispatchToastMessage({ type: 'success', message: t('User_added') });
+		} catch (error) {
+			dispatchToastMessage({ type: 'error', message: error as Error });
+		}
+	});
+
+	const addUserOption = useMemo(
+		() =>
+			roomCanInvite && userCanAdd && room.archived !== true
+				? {
+						content: t('add-to-room'),
+						icon: 'user-plus' as const,
+						onClick: addUserOptionAction,
+						type: 'management' as const,
+				  }
+				: undefined,
+		[roomCanInvite, userCanAdd, room.archived, t, addUserOptionAction],
+	);
+
+	return addUserOption;
+};
diff --git a/apps/meteor/client/views/room/hooks/useUserInfoActions/useUserInfoActions.ts b/apps/meteor/client/views/room/hooks/useUserInfoActions/useUserInfoActions.ts
index a058fb862ad5..2a70ff55ee34 100644
--- a/apps/meteor/client/views/room/hooks/useUserInfoActions/useUserInfoActions.ts
+++ b/apps/meteor/client/views/room/hooks/useUserInfoActions/useUserInfoActions.ts
@@ -6,6 +6,7 @@ import { useMemo } from 'react';
 
 import type { GenericMenuItemProps } from '../../../../components/GenericMenu/GenericMenuItem';
 import { useEmbeddedLayout } from '../../../../hooks/useEmbeddedLayout';
+import { useAddUserAction } from './actions/useAddUserAction';
 import { useBlockUserAction } from './actions/useBlockUserAction';
 import { useCallAction } from './actions/useCallAction';
 import { useChangeLeaderAction } from './actions/useChangeLeaderAction';
@@ -39,7 +40,9 @@ export const useUserInfoActions = (
 	rid: IRoom['_id'],
 	reload?: () => void,
 	size = 2,
+	isMember?: boolean,
 ): { actions: [string, UserInfoAction][]; menuActions: any | undefined } => {
+	const addUser = useAddUserAction(user, rid, reload);
 	const blockUser = useBlockUserAction(user, rid);
 	const changeLeader = useChangeLeaderAction(user, rid);
 	const changeModerator = useChangeModeratorAction(user, rid);
@@ -58,15 +61,16 @@ export const useUserInfoActions = (
 		() => ({
 			...(openDirectMessage && !isLayoutEmbedded && { openDirectMessage }),
 			...(call && { call }),
-			...(changeOwner && { changeOwner }),
-			...(changeLeader && { changeLeader }),
-			...(changeModerator && { changeModerator }),
-			...(openModerationConsole && { openModerationConsole }),
-			...(ignoreUser && { ignoreUser }),
-			...(muteUser && { muteUser }),
+			...(!isMember && addUser && { addUser }),
+			...(isMember && changeOwner && { changeOwner }),
+			...(isMember && changeLeader && { changeLeader }),
+			...(isMember && changeModerator && { changeModerator }),
+			...(isMember && openModerationConsole && { openModerationConsole }),
+			...(isMember && ignoreUser && { ignoreUser }),
+			...(isMember && muteUser && { muteUser }),
 			...(blockUser && { toggleBlock: blockUser }),
 			...(reportUserOption && { reportUser: reportUserOption }),
-			...(removeUser && { removeUser }),
+			...(isMember && removeUser && { removeUser }),
 		}),
 		[
 			openDirectMessage,
@@ -81,6 +85,8 @@ export const useUserInfoActions = (
 			removeUser,
 			reportUserOption,
 			openModerationConsole,
+			addUser,
+			isMember,
 		],
 	);
 
diff --git a/apps/meteor/client/views/room/lib/getRoomDirectives.ts b/apps/meteor/client/views/room/lib/getRoomDirectives.ts
index f03d41622606..f697fc7b51a6 100644
--- a/apps/meteor/client/views/room/lib/getRoomDirectives.ts
+++ b/apps/meteor/client/views/room/lib/getRoomDirectives.ts
@@ -11,6 +11,7 @@ type getRoomDirectiesType = {
 	roomCanBlock: boolean;
 	roomCanMute: boolean;
 	roomCanRemove: boolean;
+	roomCanInvite: boolean;
 };
 
 export const getRoomDirectives = ({
@@ -24,7 +25,7 @@ export const getRoomDirectives = ({
 }): getRoomDirectiesType => {
 	const roomDirectives = room?.t && roomCoordinator.getRoomDirectives(room.t);
 
-	const [roomCanSetOwner, roomCanSetLeader, roomCanSetModerator, roomCanIgnore, roomCanBlock, roomCanMute, roomCanRemove] = [
+	const [roomCanSetOwner, roomCanSetLeader, roomCanSetModerator, roomCanIgnore, roomCanBlock, roomCanMute, roomCanRemove, roomCanInvite] = [
 		...((roomDirectives && [
 			roomDirectives.allowMemberAction(room, RoomMemberActions.SET_AS_OWNER, showingUserId, userSubscription),
 			roomDirectives.allowMemberAction(room, RoomMemberActions.SET_AS_LEADER, showingUserId, userSubscription),
@@ -33,9 +34,10 @@ export const getRoomDirectives = ({
 			roomDirectives.allowMemberAction(room, RoomMemberActions.BLOCK, showingUserId, userSubscription),
 			roomDirectives.allowMemberAction(room, RoomMemberActions.MUTE, showingUserId, userSubscription),
 			roomDirectives.allowMemberAction(room, RoomMemberActions.REMOVE_USER, showingUserId, userSubscription),
+			roomDirectives.allowMemberAction(room, RoomMemberActions.INVITE, showingUserId, userSubscription),
 		]) ??
 			[]),
 	];
 
-	return { roomCanSetOwner, roomCanSetLeader, roomCanSetModerator, roomCanIgnore, roomCanBlock, roomCanMute, roomCanRemove };
+	return { roomCanSetOwner, roomCanSetLeader, roomCanSetModerator, roomCanIgnore, roomCanBlock, roomCanMute, roomCanRemove, roomCanInvite };
 };
diff --git a/apps/meteor/tests/e2e/user-card-info-actions-by-member.spec.ts b/apps/meteor/tests/e2e/user-card-info-actions-by-member.spec.ts
new file mode 100644
index 000000000000..b664f2c9ee69
--- /dev/null
+++ b/apps/meteor/tests/e2e/user-card-info-actions-by-member.spec.ts
@@ -0,0 +1,90 @@
+import { Users } from './fixtures/userStates';
+import { HomeChannel } from './page-objects';
+import { createTargetChannel, deleteChannel } from './utils';
+import { expect, test } from './utils/test';
+
+test.use({ storageState: Users.user3.state });
+
+test.describe.parallel('Mention User Card [To Member]', () => {
+	let poHomeChannel: HomeChannel;
+	let targetChannel: string;
+
+	test.beforeAll(async ({ api }) => {
+		targetChannel = await createTargetChannel(api, { members: [Users.user1.data.username, Users.user3.data.username] });
+
+		await api.post(`/chat.postMessage`, {
+			text: `Hello @${Users.user1.data.username} @${Users.user2.data.username}`,
+			channel: targetChannel,
+		});
+	});
+
+	test.beforeEach(async ({ page }) => {
+		poHomeChannel = new HomeChannel(page);
+
+		await page.goto('/home');
+	});
+
+	test.afterAll(({ api }) => deleteChannel(api, targetChannel));
+
+	test('should show correct userinfo actions for a member of the room to a non-privileged member', async ({ page }) => {
+		await poHomeChannel.sidenav.openChat(targetChannel);
+		const mentionSpan = page.locator(`span[title="Mentions user"][data-uid="${Users.user1.data.username}"]`);
+		await mentionSpan.click();
+
+		await expect(page.locator('div[aria-label="User card actions"]')).toBeVisible();
+		const moreButton = await page.locator('div[aria-label="User card actions"] button[title="More"]');
+		if (await moreButton.isVisible()) {
+			await moreButton.click();
+		}
+
+		const isAddToRoomVisible =
+			(await page.locator('button[title="Add to room"]').isVisible()) || (await page.locator('label[data-key="Add to room"]').isVisible());
+		await expect(isAddToRoomVisible).toBeFalsy();
+
+		const isRemoveFromRoomVisible =
+			(await page.locator('button[title="Remove from room"]').isVisible()) ||
+			(await page.locator('label[data-key="Remove from room"]').isVisible());
+		await expect(isRemoveFromRoomVisible).toBeFalsy();
+
+		const isSetAsLeaderVisible =
+			(await page.locator('button[title="Set as leader"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as leader"]').isVisible());
+		await expect(isSetAsLeaderVisible).toBeFalsy();
+
+		const isSetAsModeratorVisible =
+			(await page.locator('button[title="Set as moderator"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as moderator"]').isVisible());
+		await expect(isSetAsModeratorVisible).toBeFalsy();
+	});
+
+	test('should show correct userinfo actions for a non-member of the room to a non-privileged member', async ({ page }) => {
+		await poHomeChannel.sidenav.openChat(targetChannel);
+		const mentionSpan = page.locator(`span[title="Mentions user"][data-uid="${Users.user2.data.username}"]`);
+		await mentionSpan.click();
+
+		await expect(page.locator('div[aria-label="User card actions"]')).toBeVisible();
+		const moreButton = await page.locator('div[aria-label="User card actions"] button[title="More"]');
+		if (await moreButton.isVisible()) {
+			await moreButton.click();
+		}
+
+		const isAddToRoomVisible =
+			(await page.locator('button[title="Add to room"]').isVisible()) || (await page.locator('label[data-key="Add to room"]').isVisible());
+		await expect(isAddToRoomVisible).toBeFalsy();
+
+		const isRemoveFromRoomVisible =
+			(await page.locator('button[title="Remove from room"]').isVisible()) ||
+			(await page.locator('label[data-key="Remove from room"]').isVisible());
+		await expect(isRemoveFromRoomVisible).toBeFalsy();
+
+		const isSetAsLeaderVisible =
+			(await page.locator('button[title="Set as leader"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as leader"]').isVisible());
+		await expect(isSetAsLeaderVisible).toBeFalsy();
+
+		const isSetAsModeratorVisible =
+			(await page.locator('button[title="Set as moderator"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as moderator"]').isVisible());
+		await expect(isSetAsModeratorVisible).toBeFalsy();
+	});
+});
diff --git a/apps/meteor/tests/e2e/user-card-info-actions-by-room-owner.spec.ts b/apps/meteor/tests/e2e/user-card-info-actions-by-room-owner.spec.ts
new file mode 100644
index 000000000000..808acbb79bbd
--- /dev/null
+++ b/apps/meteor/tests/e2e/user-card-info-actions-by-room-owner.spec.ts
@@ -0,0 +1,90 @@
+import { Users } from './fixtures/userStates';
+import { HomeChannel } from './page-objects';
+import { createTargetChannel, deleteChannel } from './utils';
+import { expect, test } from './utils/test';
+
+test.use({ storageState: Users.admin.state });
+test.describe.parallel('Mention User Card [To Room Owner]', () => {
+	let poHomeChannel: HomeChannel;
+	let targetChannel: string;
+
+	test.beforeAll(async ({ api }) => {
+		targetChannel = await createTargetChannel(api, { members: [Users.user1.data.username] });
+
+		await api.post(`/chat.postMessage`, {
+			text: `Hello @${Users.user1.data.username} @${Users.user2.data.username}`,
+			channel: targetChannel,
+		});
+	});
+
+	test.beforeEach(async ({ page }) => {
+		poHomeChannel = new HomeChannel(page);
+
+		await page.goto('/home');
+	});
+
+	test.afterAll(({ api }) => deleteChannel(api, targetChannel));
+
+	test('should show correct userinfo actions for a member of the room to the room owner', async ({ page }) => {
+		await poHomeChannel.sidenav.openChat(targetChannel);
+		const mentionSpan = page.locator(`span[title="Mentions user"][data-uid="${Users.user1.data.username}"]`);
+		await mentionSpan.click();
+
+		await expect(page.locator('div[aria-label="User card actions"]')).toBeVisible();
+		const moreButton = await page.locator('div[aria-label="User card actions"] button[title="More"]');
+
+		if (await moreButton.isVisible()) {
+			await moreButton.click();
+		}
+
+		const isAddToRoomVisible =
+			(await page.locator('button[title="Add to room"]').isVisible()) || (await page.locator('label[data-key="Add to room"]').isVisible());
+		await expect(isAddToRoomVisible).toBeFalsy();
+
+		const isRemoveFromRoomVisible =
+			(await page.locator('button[title="Remove from room"]').isVisible()) ||
+			(await page.locator('label[data-key="Remove from room"]').isVisible());
+		await expect(isRemoveFromRoomVisible).toBeTruthy();
+
+		const isSetAsLeaderVisible =
+			(await page.locator('button[title="Set as leader"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as leader"]').isVisible());
+		await expect(isSetAsLeaderVisible).toBeTruthy();
+
+		const isSetAsModeratorVisible =
+			(await page.locator('button[title="Set as moderator"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as moderator"]').isVisible());
+		await expect(isSetAsModeratorVisible).toBeTruthy();
+	});
+
+	test('should show correct userinfo actions for a non-member of the room to the room owner', async ({ page }) => {
+		await poHomeChannel.sidenav.openChat(targetChannel);
+		const mentionSpan = page.locator(`span[title="Mentions user"][data-uid="${Users.user2.data.username}"]`);
+		await mentionSpan.click();
+
+		await expect(page.locator('div[aria-label="User card actions"]')).toBeVisible();
+		const moreButton = await page.locator('div[aria-label="User card actions"] button[title="More"]');
+		if (await moreButton.isVisible()) {
+			await moreButton.click();
+		}
+
+		const isAddToRoomVisible =
+			(await page.locator('button[title="Add to room"]').isVisible()) || (await page.locator('label[data-key="Add to room"]').isVisible());
+		await expect(isAddToRoomVisible).toBeTruthy();
+
+		const isRemoveFromRoomVisible =
+			(await page.locator('button[title="Remove from room"]').isVisible()) ||
+			(await page.locator('label[data-key="Remove from room"]').isVisible());
+		await expect(isRemoveFromRoomVisible).toBeFalsy();
+
+		const isSetAsLeaderVisible =
+			(await page.locator('button[title="Set as leader"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as leader"]').isVisible());
+		await expect(isSetAsLeaderVisible).toBeFalsy();
+
+		const isSetAsModeratorVisible =
+			(await page.locator('button[title="Set as moderator"]').isVisible()) ||
+			(await page.locator('label[data-key="Set as moderator"]').isVisible());
+		await expect(isSetAsModeratorVisible).toBeFalsy();
+	});
+});
diff --git a/apps/meteor/tests/end-to-end/api/rooms.ts b/apps/meteor/tests/end-to-end/api/rooms.ts
index fc0a87a8e260..981388c416a9 100644
--- a/apps/meteor/tests/end-to-end/api/rooms.ts
+++ b/apps/meteor/tests/end-to-end/api/rooms.ts
@@ -3032,4 +3032,286 @@ describe('[Rooms]', () => {
 				});
 		});
 	});
+	describe('/rooms.isMember', () => {
+		let testChannel: IRoom;
+		let testGroup: IRoom;
+		let testDM: IRoom;
+
+		const fakeRoomId = `room.test.${Date.now()}-${Math.random()}`;
+		const fakeUserId = `user.test.${Date.now()}-${Math.random()}`;
+
+		const testChannelName = `channel.test.${Date.now()}-${Math.random()}`;
+		const testGroupName = `group.test.${Date.now()}-${Math.random()}`;
+
+		let testUser1: TestUser<IUser>;
+		let testUser2: TestUser<IUser>;
+		let testUserNonMember: TestUser<IUser>;
+		let testUser1Credentials: Credentials;
+		let testUserNonMemberCredentials: Credentials;
+
+		before(async () => {
+			testUser1 = await createUser();
+			testUser1Credentials = await login(testUser1.username, password);
+		});
+
+		before(async () => {
+			testUser2 = await createUser();
+		});
+
+		before(async () => {
+			testUserNonMember = await createUser();
+			testUserNonMemberCredentials = await login(testUserNonMember.username, password);
+		});
+
+		before(async () => {
+			const response = await createRoom({
+				type: 'c',
+				name: testChannelName,
+				members: [testUser1.username, testUser2.username],
+			});
+			testChannel = response.body.channel;
+		});
+
+		before(async () => {
+			const response = await createRoom({
+				type: 'p',
+				name: testGroupName,
+				members: [testUser1.username, testUser2.username],
+			});
+			testGroup = response.body.group;
+		});
+
+		before(async () => {
+			const response = await createRoom({
+				type: 'd',
+				username: testUser2.username,
+				credentials: testUser1Credentials,
+			});
+			testDM = response.body.room;
+		});
+
+		after(() =>
+			Promise.all([
+				deleteRoom({ type: 'c', roomId: testChannel._id }),
+				deleteRoom({ type: 'p', roomId: testGroup._id }),
+				deleteRoom({ type: 'd', roomId: testDM._id }),
+				deleteUser(testUser1),
+				deleteUser(testUser2),
+				deleteUser(testUserNonMember),
+			]),
+		);
+
+		it('should return error if room not found', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: fakeRoomId,
+					userId: testUser1._id,
+				})
+				.expect(400)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', false);
+					expect(res.body).to.have.property(
+						'error',
+						'The required "roomId" or "roomName" param provided does not match any channel [error-room-not-found]',
+					);
+				});
+		});
+
+		it('should return error if user not found with the given userId', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testChannel._id,
+					userId: fakeUserId,
+				})
+				.expect(400)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', false);
+					expect(res.body).to.have.property('error', 'error-user-not-found');
+				});
+		});
+
+		it('should return error if user not found with the given username', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testChannel._id,
+					username: fakeUserId,
+				})
+				.expect(400)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', false);
+					expect(res.body).to.have.property('error', 'error-user-not-found');
+				});
+		});
+
+		it('should return success with isMember=true if given userId is a member of the channel', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testChannel._id,
+					userId: testUser2._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=true if given username is a member of the channel', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testChannel._id,
+					username: testUser2.username,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=false if user is not a member of the channel', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testChannel._id,
+					userId: testUserNonMember._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', false);
+				});
+		});
+
+		it('should return success with isMember=true if given userId is a member of the group', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testGroup._id,
+					userId: testUser2._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=true if given username is a member of the group', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testGroup._id,
+					username: testUser2.username,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=false if user is not a member of the group', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testGroup._id,
+					userId: testUserNonMember._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', false);
+				});
+		});
+
+		it('should return unauthorized if caller cannot access the group', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUserNonMemberCredentials)
+				.query({
+					roomId: testGroup._id,
+					userId: testUser1._id,
+				})
+				.expect(403)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', false);
+					expect(res.body).to.have.property('error', 'unauthorized');
+				});
+		});
+
+		it('should return success with isMember=true if given userId is a member of the DM', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testDM._id,
+					userId: testUser2._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=true if given username is a member of the DM', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testDM._id,
+					username: testUser2.username,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', true);
+				});
+		});
+
+		it('should return success with isMember=false if user is not a member of the DM', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUser1Credentials)
+				.query({
+					roomId: testDM._id,
+					userId: testUserNonMember._id,
+				})
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body).to.have.property('isMember', false);
+				});
+		});
+
+		it('should return unauthorized if caller cannot access the DM', () => {
+			return request
+				.get(api('rooms.isMember'))
+				.set(testUserNonMemberCredentials)
+				.query({
+					roomId: testDM._id,
+					userId: testUser1._id,
+				})
+				.expect(403)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', false);
+					expect(res.body).to.have.property('error', 'unauthorized');
+				});
+		});
+	});
 });
diff --git a/packages/i18n/src/locales/en.i18n.json b/packages/i18n/src/locales/en.i18n.json
index 5c5010522b27..204cc75b79f5 100644
--- a/packages/i18n/src/locales/en.i18n.json
+++ b/packages/i18n/src/locales/en.i18n.json
@@ -331,6 +331,7 @@
   "Add_User": "Add User",
   "Add_users": "Add users",
   "Add_members": "Add Members",
+  "add-to-room": "Add to room",
   "add-all-to-room": "Add all users to a room",
   "add-all-to-room_description": "Permission to add all users to a room",
   "add-livechat-department-agents": "Add Omnichannel Agents to Departments",
diff --git a/packages/rest-typings/src/v1/rooms.ts b/packages/rest-typings/src/v1/rooms.ts
index 1c0b6a360f7b..cefa1321402f 100644
--- a/packages/rest-typings/src/v1/rooms.ts
+++ b/packages/rest-typings/src/v1/rooms.ts
@@ -447,6 +447,21 @@ const GETRoomsNameExistsSchema = {
 
 export const isGETRoomsNameExists = ajv.compile<GETRoomsNameExists>(GETRoomsNameExistsSchema);
 
+type RoomsIsMemberProps = { roomId: string } & ({ username: string } | { userId: string });
+
+const RoomsIsMemberPropsSchema = {
+	type: 'object',
+	properties: {
+		roomId: { type: 'string', minLength: 1 },
+		userId: { type: 'string', minLength: 1 },
+		username: { type: 'string', minLength: 1 },
+	},
+	oneOf: [{ required: ['roomId', 'userId'] }, { required: ['roomId', 'username'] }],
+	additionalProperties: false,
+};
+
+export const isRoomsIsMemberProps = ajv.compile<RoomsIsMemberProps>(RoomsIsMemberPropsSchema);
+
 export type Notifications = {
 	disableNotifications: string;
 	muteGroupMentions: string;
@@ -685,6 +700,10 @@ export type RoomsEndpoints = {
 		}>;
 	};
 
+	'/v1/rooms.isMember': {
+		GET: (params: RoomsIsMemberProps) => { isMember: boolean };
+	};
+
 	'/v1/rooms.muteUser': {
 		POST: (params: RoomsMuteUnmuteUser) => void;
 	};