diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 72894869ea..bb1290fd05 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -331,4 +331,15 @@ class MessageHandler(BaseHandler):
 
         defer.returnValue(ret)
 
+    @defer.inlineCallbacks
+    def snapshot_room(self, user_id, room_id, pagin_config=None,
+                      feedback=False):
+        yield self.auth.check_joined_room(room_id, user_id)
 
+        defer.returnValue({
+            #"membership": membership,
+            "room_id": room_id,
+            #"messages": messages,
+            #"state": state,
+            #"presence": presence,
+        })
diff --git a/synapse/rest/room.py b/synapse/rest/room.py
index 7724967061..b762de1cb3 100644
--- a/synapse/rest/room.py
+++ b/synapse/rest/room.py
@@ -353,27 +353,12 @@ class RoomInitialSyncRestServlet(RestServlet):
 
     @defer.inlineCallbacks
     def on_GET(self, request, room_id):
-        yield self.auth.get_user_by_req(request)
-        # TODO: Get all the initial sync data for this room and return in the
-        # same format as initial sync, that is:
-        # {
-        #   membership: join,
-        #   messages: [
-        #       chunk: [ msg events ],
-        #       start: s_tok,
-        #       end: e_tok
-        #   ],
-        #   room_id: foo,
-        #   state: [
-        #       { state event } , { state event }
-        #   ]
-        # }
-        # Probably worth keeping the keys room_id and membership for parity
-        # with /initialSync even though they must be joined to sync this and
-        # know the room ID, so clients can reuse the same code (room_id and
-        # membership are MANDATORY for /initialSync, so the code will expect
-        # it to be there)
-        defer.returnValue((200, {}))
+        user = yield self.auth.get_user_by_req(request)
+        events = yield self.handlers.message_handler.snapshot_room(
+            room_id=room_id,
+            user_id=user.to_string(),
+        )
+        defer.returnValue((200, events))
 
 
 class RoomTriggerBackfill(RestServlet):
diff --git a/tests/rest/test_rooms.py b/tests/rest/test_rooms.py
index 69dade4548..129f4d49f4 100644
--- a/tests/rest/test_rooms.py
+++ b/tests/rest/test_rooms.py
@@ -993,6 +993,8 @@ class RoomInitialSyncTestCase(RestTestCase):
                 "/rooms/%s/initialSync" % self.room_id)
         self.assertEquals(200, code)
 
+        self.assertEquals(self.room_id, response["room_id"])
+
 #        (code, response) = yield self.mock_resource.trigger("GET", path, None)
 #        self.assertEquals(200, code, msg=str(response))
 #        self.assert_dict(json.loads(content), response)