diff --git a/lib/models/channel.dart b/lib/models/channel.dart
index a783551..b3df743 100644
--- a/lib/models/channel.dart
+++ b/lib/models/channel.dart
@@ -13,7 +13,7 @@ class Channel {
   int type;
   Account account;
   int accountId;
-  int realmId;
+  int? realmId;
 
   Channel({
     required this.id,
@@ -28,7 +28,7 @@ class Channel {
     required this.type,
     required this.account,
     required this.accountId,
-    required this.realmId,
+    this.realmId,
   });
 
   factory Channel.fromJson(Map<String, dynamic> json) => Channel(
diff --git a/lib/providers/chat.dart b/lib/providers/chat.dart
index 091cd74..bb50e43 100644
--- a/lib/providers/chat.dart
+++ b/lib/providers/chat.dart
@@ -47,7 +47,7 @@ class ChatProvider extends ChangeNotifier {
   Future<Channel> fetchChannel(String alias) async {
     final Client client = Client();
 
-    var uri = getRequestUri('messaging', '/api/channels/$alias');
+    var uri = getRequestUri('messaging', '/api/channels/global/$alias');
     var res = await client.get(uri);
     if (res.statusCode == 200) {
       final result = jsonDecode(utf8.decode(res.bodyBytes));
@@ -63,7 +63,7 @@ class ChatProvider extends ChangeNotifier {
   Future<Call?> fetchOngoingCall(String alias) async {
     final Client client = Client();
 
-    var uri = getRequestUri('messaging', '/api/channels/$alias/calls/ongoing');
+    var uri = getRequestUri('messaging', '/api/channels/global/$alias/calls/ongoing');
     var res = await client.get(uri);
     if (res.statusCode == 200) {
       final result = jsonDecode(utf8.decode(res.bodyBytes));
@@ -181,7 +181,7 @@ class ChatCallInstance {
       throw Exception('unauthorized');
     }
 
-    var uri = getRequestUri('messaging', '/api/channels/${channel.alias}/calls/ongoing/token');
+    var uri = getRequestUri('messaging', '/api/channels/global/${channel.alias}/calls/ongoing/token');
 
     var res = await auth.client!.post(uri);
     if (res.statusCode == 200) {
diff --git a/lib/screens/chat/channel/channel_editor.dart b/lib/screens/chat/channel/channel_editor.dart
index 9b8b508..9675196 100644
--- a/lib/screens/chat/channel/channel_editor.dart
+++ b/lib/screens/chat/channel/channel_editor.dart
@@ -39,8 +39,8 @@ class _ChannelEditorScreenState extends State<ChannelEditorScreen> {
     }
 
     final uri = widget.editing == null
-        ? getRequestUri('messaging', '/api/channels')
-        : getRequestUri('messaging', '/api/channels/${widget.editing!.id}');
+        ? getRequestUri('messaging', '/api/channels/global')
+        : getRequestUri('messaging', '/api/channels/global/${widget.editing!.id}');
 
     final req = Request(widget.editing == null ? 'POST' : 'PUT', uri);
     req.headers['Content-Type'] = 'application/json';
diff --git a/lib/screens/chat/channel/channel_member.dart b/lib/screens/chat/channel/channel_member.dart
index 66a12f6..210b491 100644
--- a/lib/screens/chat/channel/channel_member.dart
+++ b/lib/screens/chat/channel/channel_member.dart
@@ -37,7 +37,7 @@ class _ChatMemberScreenState extends State<ChatMemberScreen> {
     _selfId = prof['id'];
 
     var uri = getRequestUri(
-        'messaging', '/api/channels/${widget.channel.alias}/members');
+        'messaging', '/api/channels/global/${widget.channel.alias}/members');
 
     var res = await auth.client!.get(uri);
     if (res.statusCode == 200) {
@@ -61,7 +61,7 @@ class _ChatMemberScreenState extends State<ChatMemberScreen> {
     }
 
     var uri = getRequestUri(
-        'messaging', '/api/channels/${widget.channel.alias}/kick');
+        'messaging', '/api/channels/global/${widget.channel.alias}/kick');
 
     var res = await auth.client!.post(
       uri,
@@ -92,7 +92,7 @@ class _ChatMemberScreenState extends State<ChatMemberScreen> {
     }
 
     var uri = getRequestUri(
-        'messaging', '/api/channels/${widget.channel.alias}/invite');
+        'messaging', '/api/channels/global/${widget.channel.alias}/invite');
 
     var res = await auth.client!.post(
       uri,
diff --git a/lib/screens/chat/chat.dart b/lib/screens/chat/chat.dart
index dd4fcef..d2fbc5d 100644
--- a/lib/screens/chat/chat.dart
+++ b/lib/screens/chat/chat.dart
@@ -77,7 +77,7 @@ class _ChatScreenWidgetState extends State<ChatScreenWidget> {
 
     var uri = getRequestUri(
       'messaging',
-      '/api/channels/${widget.alias}/messages?take=$take&offset=$offset',
+      '/api/channels/global/${widget.alias}/messages?take=$take&offset=$offset',
     );
 
     var res = await auth.client!.get(uri);
diff --git a/lib/screens/chat/chat_list.dart b/lib/screens/chat/chat_list.dart
index 3277597..7aa686d 100644
--- a/lib/screens/chat/chat_list.dart
+++ b/lib/screens/chat/chat_list.dart
@@ -58,7 +58,7 @@ class _ChatListWidgetState extends State<ChatListWidget> {
     final auth = context.read<AuthProvider>();
     if (!await auth.isAuthorized()) return;
 
-    var uri = getRequestUri('messaging', '/api/channels/me/available');
+    var uri = getRequestUri('messaging', '/api/channels/global/me/available');
 
     var res = await auth.client!.get(uri);
     if (res.statusCode == 200) {
diff --git a/lib/widgets/chat/channel_action.dart b/lib/widgets/chat/channel_action.dart
index fd6e6e2..8c0537e 100644
--- a/lib/widgets/chat/channel_action.dart
+++ b/lib/widgets/chat/channel_action.dart
@@ -33,7 +33,7 @@ class _ChannelCallActionState extends State<ChannelCallAction> {
       return;
     }
 
-    var uri = getRequestUri('messaging', '/api/channels/${widget.channel.alias}/calls');
+    var uri = getRequestUri('messaging', '/api/channels/global/${widget.channel.alias}/calls');
 
     var res = await auth.client!.post(uri);
     if (res.statusCode != 200) {
@@ -54,7 +54,7 @@ class _ChannelCallActionState extends State<ChannelCallAction> {
       return;
     }
 
-    var uri = getRequestUri('messaging', '/api/channels/${widget.channel.alias}/calls/ongoing');
+    var uri = getRequestUri('messaging', '/api/channels/global/${widget.channel.alias}/calls/ongoing');
 
     var res = await auth.client!.delete(uri);
     if (res.statusCode != 200) {
diff --git a/lib/widgets/chat/channel_deletion.dart b/lib/widgets/chat/channel_deletion.dart
index 6d5c206..3ac4452 100644
--- a/lib/widgets/chat/channel_deletion.dart
+++ b/lib/widgets/chat/channel_deletion.dart
@@ -32,7 +32,7 @@ class _ChannelDeletionState extends State<ChannelDeletion> {
     }
 
     var res = await auth.client!.delete(
-      getRequestUri('messaging', '/api/channels/${widget.channel.id}'),
+      getRequestUri('messaging', '/api/channels/global/${widget.channel.id}'),
     );
     if (res.statusCode != 200) {
       var message = utf8.decode(res.bodyBytes);
@@ -54,7 +54,7 @@ class _ChannelDeletionState extends State<ChannelDeletion> {
     }
 
     var res = await auth.client!.post(
-      getRequestUri('messaging', '/api/channels/${widget.channel.alias}/leave'),
+      getRequestUri('messaging', '/api/channels/global/${widget.channel.alias}/leave'),
     );
     if (res.statusCode != 200) {
       var message = utf8.decode(res.bodyBytes);
diff --git a/lib/widgets/chat/message_deletion.dart b/lib/widgets/chat/message_deletion.dart
index cfba7ec..dc66954 100644
--- a/lib/widgets/chat/message_deletion.dart
+++ b/lib/widgets/chat/message_deletion.dart
@@ -31,7 +31,7 @@ class _ChatMessageDeletionDialogState extends State<ChatMessageDeletionDialog> {
     if (!await auth.isAuthorized()) return;
 
     final uri = getRequestUri('messaging',
-        '/api/channels/${widget.channel}/messages/${widget.item.id}');
+        '/api/channels/global/${widget.channel}/messages/${widget.item.id}');
 
     setState(() => _isSubmitting = true);
     final res = await auth.client!.delete(uri);
diff --git a/lib/widgets/chat/message_editor.dart b/lib/widgets/chat/message_editor.dart
index c72e63c..9b852fe 100644
--- a/lib/widgets/chat/message_editor.dart
+++ b/lib/widgets/chat/message_editor.dart
@@ -53,8 +53,8 @@ class _ChatMessageEditorState extends State<ChatMessageEditor> {
     if (!await auth.isAuthorized()) return;
 
     final uri = widget.editing == null
-        ? getRequestUri('messaging', '/api/channels/${widget.channel}/messages')
-        : getRequestUri('messaging', '/api/channels/${widget.channel}/messages/${widget.editing!.id}');
+        ? getRequestUri('messaging', '/api/channels/global/${widget.channel}/messages')
+        : getRequestUri('messaging', '/api/channels/global/${widget.channel}/messages/${widget.editing!.id}');
 
     final req = Request(widget.editing == null ? 'POST' : 'PUT', uri);
     req.headers['Content-Type'] = 'application/json';