diff --git a/modules/Makefile.am b/modules/Makefile.am
index f2e35362d..78d6b0224 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -289,11 +289,17 @@ client_module_LTLIBRARIES += \
 client_client_sync_account_data_la_SOURCES = client/sync/account_data.cc
 client_client_sync_presence_la_SOURCES = client/sync/presence.cc
 client_client_sync_rooms_la_SOURCES = client/sync/rooms.cc
+client_client_sync_to_device_la_SOURCES = client/sync/to_device.cc
+client_client_sync_device_lists_la_SOURCES = client/sync/device_lists.cc
+client_client_sync_device_one_time_keys_count_la_SOURCES = client/sync/device_one_time_keys_count.cc
 
 client_module_LTLIBRARIES += \
 	client/client_sync_account_data.la \
 	client/client_sync_presence.la \
 	client/client_sync_rooms.la \
+	client/client_sync_to_device.la \
+	client/client_sync_device_lists.la \
+	client/client_sync_device_one_time_keys_count.la \
 	###
 
 # client/sync/rooms/
diff --git a/modules/client/sync/device_lists.cc b/modules/client/sync/device_lists.cc
new file mode 100644
index 000000000..1bd344e9b
--- /dev/null
+++ b/modules/client/sync/device_lists.cc
@@ -0,0 +1,56 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+ircd::mapi::header
+IRCD_MODULE
+{
+	"Client Sync :Device Lists"
+};
+
+namespace ircd::m::sync
+{
+	static void device_lists_polylog(data &);
+	static void device_lists_linear(data &);
+
+	extern item device_lists;
+}
+
+decltype(ircd::m::sync::device_lists)
+ircd::m::sync::device_lists
+{
+	"device_lists",
+	device_lists_polylog,
+	device_lists_linear
+};
+
+void
+ircd::m::sync::device_lists_linear(data &data)
+{
+
+}
+
+void
+ircd::m::sync::device_lists_polylog(data &data)
+{
+	json::stack::object object
+	{
+		data.out
+	};
+
+	json::stack::array
+	{
+		data.out, "changed"
+	};
+
+	json::stack::array
+	{
+		data.out, "left"
+	};
+}
diff --git a/modules/client/sync/device_one_time_keys_count.cc b/modules/client/sync/device_one_time_keys_count.cc
new file mode 100644
index 000000000..f492bfea3
--- /dev/null
+++ b/modules/client/sync/device_one_time_keys_count.cc
@@ -0,0 +1,47 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+ircd::mapi::header
+IRCD_MODULE
+{
+	"Client Sync :Device One Time Keys Count"
+};
+
+namespace ircd::m::sync
+{
+	static void device_one_time_keys_count_polylog(data &);
+	static void device_one_time_keys_count_linear(data &);
+
+	extern item device_one_time_keys_count;
+}
+
+decltype(ircd::m::sync::device_one_time_keys_count)
+ircd::m::sync::device_one_time_keys_count
+{
+	"device_one_time_keys_count",
+	device_one_time_keys_count_polylog,
+	device_one_time_keys_count_linear
+};
+
+void
+ircd::m::sync::device_one_time_keys_count_linear(data &data)
+{
+
+}
+
+void
+ircd::m::sync::device_one_time_keys_count_polylog(data &data)
+{
+	json::stack::object object
+	{
+		data.out
+	};
+
+}
diff --git a/modules/client/sync/to_device.cc b/modules/client/sync/to_device.cc
new file mode 100644
index 000000000..f175a6fb3
--- /dev/null
+++ b/modules/client/sync/to_device.cc
@@ -0,0 +1,56 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+ircd::mapi::header
+IRCD_MODULE
+{
+	"Client Sync :To Device"
+};
+
+namespace ircd::m::sync
+{
+	static void to_device_polylog(data &);
+	static void to_device_linear(data &);
+
+	extern item to_device;
+}
+
+decltype(ircd::m::sync::to_device)
+ircd::m::sync::to_device
+{
+	"to_device",
+	to_device_polylog,
+	to_device_linear
+};
+
+void
+ircd::m::sync::to_device_linear(data &data)
+{
+
+}
+
+void
+ircd::m::sync::to_device_polylog(data &data)
+{
+	json::stack::object object
+	{
+		data.out
+	};
+
+	json::stack::array array
+	{
+		data.out, "events"
+	};
+
+	const m::room::state &state
+	{
+		data.user_state
+	};
+}