diff --git a/app/api/server/helpers/getUserFromParams.js b/app/api/server/helpers/getUserFromParams.js
index c97d6f34e1e..0b562a87b99 100644
--- a/app/api/server/helpers/getUserFromParams.js
+++ b/app/api/server/helpers/getUserFromParams.js
@@ -25,3 +25,28 @@ API.helperMethods.set('getUserFromParams', function _getUserFromParams() {
 
 	return user;
 });
+
+API.helperMethods.set('getUserListFromParams', function _getUserListFromParams() {
+	let users;
+	const params = this.requestParams();
+	// if params.userId is provided, include it as well
+	const soleUser = params.userId || params.username || params.user;
+	let userListParam = params.userIds || params.usernames || [];
+	userListParam.push(soleUser);
+	userListParam = userListParam.filter(Boolean);
+
+	// deduplicate to avoid errors
+	userListParam = [...new Set(userListParam)];
+
+	if (!userListParam.length) {
+		throw new Meteor.Error('error-users-params-not-provided', 'Please provide "userId" or "username" or "userIds" or "usernames" as param');
+	}
+
+	if (params.userIds || params.userId) {
+		users = Users.findByIds(userListParam);
+	} else {
+		users = Users.findByUsernamesIgnoringCase(userListParam);
+	}
+
+	return users.fetch();
+});
diff --git a/app/api/server/v1/channels.js b/app/api/server/v1/channels.js
index 0c287890b8f..5677d810fb9 100644
--- a/app/api/server/v1/channels.js
+++ b/app/api/server/v1/channels.js
@@ -422,10 +422,14 @@ API.v1.addRoute('channels.invite', { authRequired: true }, {
 	post() {
 		const findResult = findChannelByIdOrName({ params: this.requestParams() });
 
-		const user = this.getUserFromParams();
+		const users = this.getUserListFromParams();
+
+		if (!users.length) {
+			return API.v1.failure('invalid-user-invite-list', 'Cannot invite if no users are provided');
+		}
 
 		Meteor.runAsUser(this.userId, () => {
-			Meteor.call('addUserToRoom', { rid: findResult._id, username: user.username });
+			Meteor.call('addUsersToRoom', { rid: findResult._id, users: users.map((u) => u.username) });
 		});
 
 		return API.v1.success({
diff --git a/app/api/server/v1/groups.js b/app/api/server/v1/groups.js
index c2e67462651..5b357e809f8 100644
--- a/app/api/server/v1/groups.js
+++ b/app/api/server/v1/groups.js
@@ -393,9 +393,13 @@ API.v1.addRoute('groups.invite', { authRequired: true }, {
 			throw new Meteor.Error('error-room-not-found', 'The required "roomId" or "roomName" param provided does not match any group');
 		}
 
-		const { username } = this.getUserFromParams();
+		const users = this.getUserListFromParams();
 
-		Meteor.runAsUser(this.userId, () => Meteor.call('addUserToRoom', { rid, username }));
+		if (!users.length) {
+			throw new Meteor.Error('error-empty-invite-list', 'Cannot invite if no valid users are provided');
+		}
+
+		Meteor.runAsUser(this.userId, () => Meteor.call('addUsersToRoom', { rid, users: users.map((u) => u.username) }));
 
 		return API.v1.success({
 			group: this.composeRoomWithLastMessage(Rooms.findOneById(rid, { fields: API.v1.defaultFieldsToExclude }), this.userId),
diff --git a/app/models/server/models/Users.js b/app/models/server/models/Users.js
index ad9929c6b26..e6e60cd6a03 100644
--- a/app/models/server/models/Users.js
+++ b/app/models/server/models/Users.js
@@ -717,6 +717,16 @@ export class Users extends Base {
 		return this.find(query, options);
 	}
 
+	findByUsernamesIgnoringCase(usernames, options) {
+		const query = {
+			username: {
+				$in: usernames.filter(Boolean).map((u) => new RegExp(`^${ escapeRegExp(u) }$`, 'i')),
+			},
+		};
+
+		return this.find(query, options);
+	}
+
 	findActive(options = {}) {
 		return this.find({
 			active: true,