diff --git a/cmdclient/console.py b/cmdclient/console.py
index 7bda4000f..7678b5e35 100755
--- a/cmdclient/console.py
+++ b/cmdclient/console.py
@@ -60,7 +60,7 @@ class SynapseCmd(cmd.Cmd):
             "complete_usernames": "on",
             "send_delivery_receipts": "on"
         }
-        self.path_prefix = "/matrix/client/api/v1"
+        self.path_prefix = "/_matrix/client/api/v1"
         self.event_stream_token = "END"
         self.prompt = ">>> "
 
@@ -252,7 +252,7 @@ class SynapseCmd(cmd.Cmd):
 
     @defer.inlineCallbacks
     def _do_emailrequest(self, args):
-        url = self._identityServerUrl()+"/matrix/identity/api/v1/validate/email/requestToken"
+        url = self._identityServerUrl()+"/_matrix/identity/api/v1/validate/email/requestToken"
 
         json_res = yield self.http_client.do_request("POST", url, data=urllib.urlencode(args), jsonreq=False,
                                                      headers={'Content-Type': ['application/x-www-form-urlencoded']})
@@ -274,7 +274,7 @@ class SynapseCmd(cmd.Cmd):
 
     @defer.inlineCallbacks
     def _do_emailvalidate(self, args):
-        url = self._identityServerUrl()+"/matrix/identity/api/v1/validate/email/submitToken"
+        url = self._identityServerUrl()+"/_matrix/identity/api/v1/validate/email/submitToken"
 
         json_res = yield self.http_client.do_request("POST", url, data=urllib.urlencode(args), jsonreq=False,
                                                      headers={'Content-Type': ['application/x-www-form-urlencoded']})
@@ -294,7 +294,7 @@ class SynapseCmd(cmd.Cmd):
 
     @defer.inlineCallbacks
     def _do_3pidbind(self, args):
-        url = self._identityServerUrl()+"/matrix/identity/api/v1/3pid/bind"
+        url = self._identityServerUrl()+"/_matrix/identity/api/v1/3pid/bind"
 
         json_res = yield self.http_client.do_request("POST", url, data=urllib.urlencode(args), jsonreq=False,
                                                      headers={'Content-Type': ['application/x-www-form-urlencoded']})
@@ -360,14 +360,14 @@ class SynapseCmd(cmd.Cmd):
     def _do_invite(self, roomid, userstring):
         if (not userstring.startswith('@') and
                     self._is_on("complete_usernames")):
-            url = self._identityServerUrl()+"/matrix/identity/api/v1/lookup"
+            url = self._identityServerUrl()+"/_matrix/identity/api/v1/lookup"
 
             json_res = yield self.http_client.do_request("GET", url, qparams={'medium':'email','address':userstring})
 
             mxid = None
 
             if 'mxid' in json_res and 'signatures' in json_res:
-                url = self._identityServerUrl()+"/matrix/identity/api/v1/pubkey/ed25519"
+                url = self._identityServerUrl()+"/_matrix/identity/api/v1/pubkey/ed25519"
 
                 pubKey = None
                 pubKeyObj = yield self.http_client.do_request("GET", url)
diff --git a/docs/client-server/howto.rst b/docs/client-server/howto.rst
index 9ef4cb5f7..3660c73d3 100644
--- a/docs/client-server/howto.rst
+++ b/docs/client-server/howto.rst
@@ -30,7 +30,7 @@ Registration
 The aim of registration is to get a user ID and access token which you will need
 when accessing other APIs::
 
-    curl -XPOST -d '{"user_id":"example", "password":"wordpass"}' "http://localhost:8080/matrix/client/api/v1/register"
+    curl -XPOST -d '{"user_id":"example", "password":"wordpass"}' "http://localhost:8080/_matrix/client/api/v1/register"
 
     {
         "access_token": "QGV4YW1wbGU6bG9jYWxob3N0.AqdSzFmFYrLrTmteXc", 
@@ -51,13 +51,13 @@ Login
 -----
 The aim when logging in is to get an access token for your existing user ID::
 
-    curl -XGET "http://localhost:8080/matrix/client/api/v1/login"
+    curl -XGET "http://localhost:8080/_matrix/client/api/v1/login"
 
     {
         "type": "m.login.password"
     }
 
-    curl -XPOST -d '{"type":"m.login.password", "user":"example", "password":"wordpass"}' "http://localhost:8080/matrix/client/api/v1/login"
+    curl -XPOST -d '{"type":"m.login.password", "user":"example", "password":"wordpass"}' "http://localhost:8080/_matrix/client/api/v1/login"
 
     {
         "access_token": "QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd", 
@@ -87,7 +87,7 @@ Creating a room
 If you want to send a message to someone, you have to be in a room with them. To
 create a room::
 
-    curl -XPOST -d '{"room_alias_name":"tutorial"}' "http://localhost:8080/matrix/client/api/v1/rooms?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
+    curl -XPOST -d '{"room_alias_name":"tutorial"}' "http://localhost:8080/_matrix/client/api/v1/rooms?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
 
     {
         "room_alias": "#tutorial:localhost", 
@@ -105,7 +105,7 @@ Sending messages
 ----------------
 You can now send messages to this room::
 
-    curl -XPUT -d '{"msgtype":"m.text", "body":"hello"}' "http://localhost:8080/matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/messages/%40example%3Alocalhost/msgid1?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
+    curl -XPUT -d '{"msgtype":"m.text", "body":"hello"}' "http://localhost:8080/_matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/messages/%40example%3Alocalhost/msgid1?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
     
 NB: There are no limitations to the types of messages which can be exchanged.
 The only requirement is that ``"msgtype"`` is specified.
@@ -127,7 +127,7 @@ Inviting a user to a room
 -------------------------
 You can directly invite a user to a room like so::
 
-    curl -XPUT -d '{"membership":"invite"}' "http://localhost:8080/matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/members/%40myfriend%3Alocalhost/state?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
+    curl -XPUT -d '{"membership":"invite"}' "http://localhost:8080/_matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/members/%40myfriend%3Alocalhost/state?access_token=QGV4YW1wbGU6bG9jYWxob3N0.vRDLTgxefmKWQEtgGd"
     
 This informs ``@myfriend:localhost`` of the room ID 
 ``!CvcvRuDYDzTOzfKKgh:localhost`` and allows them to join the room.
@@ -137,7 +137,7 @@ Joining a room via an invite
 If you receive an invite, you can join the room by changing the membership to
 join::
 
-    curl -XPUT -d '{"membership":"join"}' "http://localhost:8080/matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/members/%40myfriend%3Alocalhost/state?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
+    curl -XPUT -d '{"membership":"join"}' "http://localhost:8080/_matrix/client/api/v1/rooms/%21CvcvRuDYDzTOzfKKgh:localhost/members/%40myfriend%3Alocalhost/state?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
     
 NB: Only the person invited (``@myfriend:localhost``) can change the membership
 state to ``"join"``.
@@ -147,7 +147,7 @@ Joining a room via an alias
 Alternatively, if you know the room alias for this room and the room config 
 allows it, you can directly join a room via the alias::
 
-    curl -XPUT -d '{}' "http://localhost:8080/matrix/client/api/v1/join/%23tutorial%3Alocalhost?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
+    curl -XPUT -d '{}' "http://localhost:8080/_matrix/client/api/v1/join/%23tutorial%3Alocalhost?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
     
     {
         "room_id": "!CvcvRuDYDzTOzfKKgh:localhost"
@@ -173,7 +173,7 @@ Getting all state
 If the client doesn't know any information on the rooms the user is 
 invited/joined on, they can get all the user's state for all rooms::
 
-    curl -XGET "http://localhost:8080/matrix/client/api/v1/im/sync?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
+    curl -XGET "http://localhost:8080/_matrix/client/api/v1/im/sync?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK"
     
     [
         {
@@ -236,7 +236,7 @@ all of the messages and feedback for these rooms. This can be a LOT of data. You
 may just want the most recent message for each room. This can be achieved by 
 applying pagination stream parameters to this request::
 
-    curl -XGET "http://localhost:8080/matrix/client/api/v1/im/sync?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK&from=END&to=START&limit=1"
+    curl -XGET "http://localhost:8080/_matrix/client/api/v1/im/sync?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK&from=END&to=START&limit=1"
     
     [
         {
@@ -271,7 +271,7 @@ Getting live state
 Once you know which rooms the client has previously interacted with, you need to
 listen for incoming events. This can be done like so::
 
-    curl -XGET "http://localhost:8080/matrix/client/api/v1/events?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK&from=END"
+    curl -XGET "http://localhost:8080/_matrix/client/api/v1/events?access_token=QG15ZnJpZW5kOmxvY2FsaG9zdA...XKuGdVsovHmwMyDDvK&from=END"
     
     {
         "chunk": [], 
diff --git a/docs/client-server/specification.rst b/docs/client-server/specification.rst
index 4c1a3d445..ee8bb5c42 100644
--- a/docs/client-server/specification.rst
+++ b/docs/client-server/specification.rst
@@ -306,11 +306,11 @@ POST requests MUST be submitted as application/json.
 All paths MUST be namespaced by the version of the API being used. This should
 be:
 
-/matrix/client/api/v1
+/_matrix/client/api/v1
 
 All REST paths in this section MUST be prefixed with this. E.g.
   REST Path: /rooms/$room_id
-  Absolute Path: /matrix/client/api/v1/rooms/$room_id
+  Absolute Path: /_matrix/client/api/v1/rooms/$room_id
 
 Registration
 ============
diff --git a/docs/client-server/swagger_matrix/directory b/docs/client-server/swagger_matrix/directory
index 3f3bef9c1..98109a0fb 100644
--- a/docs/client-server/swagger_matrix/directory
+++ b/docs/client-server/swagger_matrix/directory
@@ -1,7 +1,7 @@
 {
   "apiVersion": "1.0.0",
   "swaggerVersion": "1.2",
-  "basePath": "http://localhost:8080/matrix/client/api/v1",
+  "basePath": "http://localhost:8080/_matrix/client/api/v1",
   "resourcePath": "/directory",
   "produces": [
     "application/json"
diff --git a/docs/client-server/swagger_matrix/events b/docs/client-server/swagger_matrix/events
index ca69d34db..d22c68cc7 100644
--- a/docs/client-server/swagger_matrix/events
+++ b/docs/client-server/swagger_matrix/events
@@ -1,7 +1,7 @@
 {
   "apiVersion": "1.0.0",
   "swaggerVersion": "1.2",
-  "basePath": "http://localhost:8080/matrix/client/api/v1",
+  "basePath": "http://localhost:8080/_matrix/client/api/v1",
   "resourcePath": "/events",
   "produces": [
     "application/json"
diff --git a/docs/client-server/swagger_matrix/login b/docs/client-server/swagger_matrix/login
index 4410d3c88..8cc598b3c 100644
--- a/docs/client-server/swagger_matrix/login
+++ b/docs/client-server/swagger_matrix/login
@@ -40,7 +40,7 @@
       "path": "/login"
     }
   ], 
-  "basePath": "http://localhost:8080/matrix/client/api/v1", 
+  "basePath": "http://localhost:8080/_matrix/client/api/v1", 
   "consumes": [
     "application/json"
   ], 
diff --git a/docs/client-server/swagger_matrix/presence b/docs/client-server/swagger_matrix/presence
index 1b4c7323a..d52ce2164 100644
--- a/docs/client-server/swagger_matrix/presence
+++ b/docs/client-server/swagger_matrix/presence
@@ -1,7 +1,7 @@
 {
   "apiVersion": "1.0.0",
   "swaggerVersion": "1.2",
-  "basePath": "http://localhost:8080/matrix/client/api/v1",
+  "basePath": "http://localhost:8080/_matrix/client/api/v1",
   "resourcePath": "/presence",
   "produces": [
     "application/json"
diff --git a/docs/client-server/swagger_matrix/profile b/docs/client-server/swagger_matrix/profile
index 1ebde62e2..188259fa3 100644
--- a/docs/client-server/swagger_matrix/profile
+++ b/docs/client-server/swagger_matrix/profile
@@ -1,7 +1,7 @@
 {
   "apiVersion": "1.0.0",
   "swaggerVersion": "1.2",
-  "basePath": "http://localhost:8080/matrix/client/api/v1",
+  "basePath": "http://localhost:8080/_matrix/client/api/v1",
   "resourcePath": "/profile",
   "produces": [
     "application/json"
diff --git a/docs/client-server/swagger_matrix/registration b/docs/client-server/swagger_matrix/registration
index ccd542d11..2048aec1d 100644
--- a/docs/client-server/swagger_matrix/registration
+++ b/docs/client-server/swagger_matrix/registration
@@ -37,7 +37,7 @@
       "path": "/register"
     }
   ], 
-  "basePath": "http://localhost:8080/matrix/client/api/v1", 
+  "basePath": "http://localhost:8080/_matrix/client/api/v1", 
   "consumes": [
     "application/json"
   ], 
diff --git a/docs/client-server/swagger_matrix/rooms b/docs/client-server/swagger_matrix/rooms
index 1c32d135a..7d3341f09 100644
--- a/docs/client-server/swagger_matrix/rooms
+++ b/docs/client-server/swagger_matrix/rooms
@@ -1,7 +1,7 @@
 {
   "apiVersion": "1.0.0",
   "swaggerVersion": "1.2",
-  "basePath": "http://localhost:8080/matrix/client/api/v1", 
+  "basePath": "http://localhost:8080/_matrix/client/api/v1", 
   "resourcePath": "/rooms",
   "produces": [
     "application/json"
diff --git a/docs/server-server/specification.rst b/docs/server-server/specification.rst
index a9ab9bff6..17cffafdd 100644
--- a/docs/server-server/specification.rst
+++ b/docs/server-server/specification.rst
@@ -155,7 +155,7 @@ Protocol URLs
 
 All these URLs are namespaced within a prefix of 
 
-  /matrix/federation/v1/...
+  /_matrix/federation/v1/...
 
 For active pushing of messages representing live activity "as it happens":
 
diff --git a/graph/graph.py b/graph/graph.py
index 220f5eb1d..ac06d979e 100644
--- a/graph/graph.py
+++ b/graph/graph.py
@@ -120,7 +120,7 @@ def make_graph(pdus, room, filename_prefix):
 def get_pdus(host, room):
     transaction = json.loads(
         urllib2.urlopen(
-            "http://%s/matrix/federation/v1/context/%s/" % (host, room)
+            "http://%s/_matrix/federation/v1/context/%s/" % (host, room)
         ).read()
     )
 
diff --git a/jsfiddles/create_room_send_msg/demo.js b/jsfiddles/create_room_send_msg/demo.js
index db2ae2d60..61044da74 100644
--- a/jsfiddles/create_room_send_msg/demo.js
+++ b/jsfiddles/create_room_send_msg/demo.js
@@ -10,7 +10,7 @@ $('.login').live('click', function() {
     var user = $("#userLogin").val();
     var password = $("#passwordLogin").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/login",
+        url: "http://localhost:8080/_matrix/client/api/v1/login",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
@@ -25,7 +25,7 @@ $('.login').live('click', function() {
 });
 
 var getCurrentRoomList = function() {
-    var url = "http://localhost:8080/matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
+    var url = "http://localhost:8080/_matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
     $.getJSON(url, function(data) {
         var rooms = data.rooms;
         for (var i=0; i<rooms.length; ++i) {
@@ -44,7 +44,7 @@ $('.createRoom').live('click', function() {
         data.room_alias_name = roomAlias;   
     }
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
+        url: "http://localhost:8080/_matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify(data),
@@ -79,7 +79,7 @@ $('.sendMessage').live('click', function() {
         return;
     }
     
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$roomid", encodeURIComponent(roomId));
     
diff --git a/jsfiddles/event_stream/demo.js b/jsfiddles/event_stream/demo.js
index 3f132cd98..997d1a224 100644
--- a/jsfiddles/event_stream/demo.js
+++ b/jsfiddles/event_stream/demo.js
@@ -7,7 +7,7 @@ var eventStreamInfo = {
 var roomInfo = [];
 
 var longpollEventStream = function() {
-    var url = "http://localhost:8080/matrix/client/api/v1/events?access_token=$token&from=$from";
+    var url = "http://localhost:8080/_matrix/client/api/v1/events?access_token=$token&from=$from";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$from", eventStreamInfo.from);
     
@@ -48,7 +48,7 @@ $('.login').live('click', function() {
     var user = $("#userLogin").val();
     var password = $("#passwordLogin").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/login",
+        url: "http://localhost:8080/_matrix/client/api/v1/login",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
@@ -65,7 +65,7 @@ $('.login').live('click', function() {
 
 var getCurrentRoomList = function() {
     $("#roomId").val("");
-    var url = "http://localhost:8080/matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
+    var url = "http://localhost:8080/_matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
     $.getJSON(url, function(data) {
         var rooms = data.rooms;
         for (var i=0; i<rooms.length; ++i) {
@@ -98,7 +98,7 @@ var sendMessage = function(roomId) {
         return;
     }
     
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$roomid", encodeURIComponent(roomId));
     
diff --git a/jsfiddles/example_app/demo.js b/jsfiddles/example_app/demo.js
index f5e08b326..958232047 100644
--- a/jsfiddles/example_app/demo.js
+++ b/jsfiddles/example_app/demo.js
@@ -10,7 +10,7 @@ var viewingRoomId;
 
 // ************** Event Streaming **************
 var longpollEventStream = function() {
-    var url = "http://localhost:8080/matrix/client/api/v1/events?access_token=$token&from=$from";
+    var url = "http://localhost:8080/_matrix/client/api/v1/events?access_token=$token&from=$from";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$from", eventStreamInfo.from);
 
@@ -89,7 +89,7 @@ $('.login').live('click', function() {
     var user = $("#userLogin").val();
     var password = $("#passwordLogin").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/login",
+        url: "http://localhost:8080/_matrix/client/api/v1/login",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
@@ -107,7 +107,7 @@ $('.register').live('click', function() {
     var user = $("#userReg").val();
     var password = $("#passwordReg").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/register",
+        url: "http://localhost:8080/_matrix/client/api/v1/register",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user_id: user, password: password }),
@@ -134,7 +134,7 @@ $('.createRoom').live('click', function() {
         data.room_alias_name = roomAlias;   
     }
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
+        url: "http://localhost:8080/_matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify(data),
@@ -155,7 +155,7 @@ $('.createRoom').live('click', function() {
 
 // ************** Getting current state **************
 var getCurrentRoomList = function() {
-    var url = "http://localhost:8080/matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
+    var url = "http://localhost:8080/_matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
     $.getJSON(url, function(data) {
         var rooms = data.rooms;
         for (var i=0; i<rooms.length; ++i) {
@@ -181,7 +181,7 @@ var loadRoomContent = function(roomId) {
 
 var getMessages = function(roomId) {
     $("#messages").empty();
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/" + 
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/" + 
               encodeURIComponent(roomId) + "/messages?access_token=" + accountInfo.access_token + "&from=END&dir=b&limit=10";
     $.getJSON(url, function(data) {
         for (var i=data.chunk.length-1; i>=0; --i) {
@@ -193,7 +193,7 @@ var getMessages = function(roomId) {
 var getMemberList = function(roomId) {
     $("#members").empty();
     memberInfo = [];
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/" + 
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/" + 
               encodeURIComponent(roomId) + "/members?access_token=" + accountInfo.access_token;
     $.getJSON(url, function(data) {
         for (var i=0; i<data.chunk.length; ++i) {
@@ -216,7 +216,7 @@ $('.sendMessage').live('click', function() {
 var sendMessage = function(roomId, body) {
     var msgId = $.now();
     
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/$roomid/send/m.room.message?access_token=$token";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$roomid", encodeURIComponent(roomId));
     
@@ -262,7 +262,7 @@ var setRooms = function(roomList) {
         var membership = $(this).find('td:eq(1)').text();
         if (membership !== "join") {
             console.log("Joining room " + roomId); 
-            var url = "http://localhost:8080/matrix/client/api/v1/rooms/$roomid/join?access_token=$token";
+            var url = "http://localhost:8080/_matrix/client/api/v1/rooms/$roomid/join?access_token=$token";
             url = url.replace("$token", accountInfo.access_token);
             url = url.replace("$roomid", encodeURIComponent(roomId));
             $.ajax({
diff --git a/jsfiddles/register_login/demo.js b/jsfiddles/register_login/demo.js
index 270a96786..1e68cb91b 100644
--- a/jsfiddles/register_login/demo.js
+++ b/jsfiddles/register_login/demo.js
@@ -11,7 +11,7 @@ $('.register').live('click', function() {
     var user = $("#user").val();
     var password = $("#password").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/register",
+        url: "http://localhost:8080/_matrix/client/api/v1/register",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user_id: user, password: password }),
@@ -27,7 +27,7 @@ $('.register').live('click', function() {
 
 var login = function(user, password) {
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/login",
+        url: "http://localhost:8080/_matrix/client/api/v1/login",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
@@ -44,7 +44,7 @@ var login = function(user, password) {
 $('.login').live('click', function() {
     var user = $("#userLogin").val();
     var password = $("#passwordLogin").val();
-    $.getJSON("http://localhost:8080/matrix/client/api/v1/login", function(data) {
+    $.getJSON("http://localhost:8080/_matrix/client/api/v1/login", function(data) {
         if (data.flows[0].type !== "m.login.password") {
             alert("I don't know how to login with this type: " + data.type);
             return;
@@ -60,7 +60,7 @@ $('.logout').live('click', function() {
 });
 
 $('.testToken').live('click', function() {
-    var url = "http://localhost:8080/matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
+    var url = "http://localhost:8080/_matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
     $.getJSON(url, function(data) {
          $("#imSyncText").text(JSON.stringify(data, undefined, 2));
     }).fail(function(err) {
diff --git a/jsfiddles/room_memberships/demo.js b/jsfiddles/room_memberships/demo.js
index 91cc96ab6..7e499049a 100644
--- a/jsfiddles/room_memberships/demo.js
+++ b/jsfiddles/room_memberships/demo.js
@@ -18,7 +18,7 @@ $('.login').live('click', function() {
     var user = $("#userLogin").val();
     var password = $("#passwordLogin").val();
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/login",
+        url: "http://localhost:8080/_matrix/client/api/v1/login",
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
@@ -39,7 +39,7 @@ var getCurrentRoomList = function() {
     // solution but that is out of scope of this fiddle.
     $("#rooms").find("tr:gt(0)").remove();
     
-    var url = "http://localhost:8080/matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
+    var url = "http://localhost:8080/_matrix/client/api/v1/initialSync?access_token=" + accountInfo.access_token + "&limit=1";
     $.getJSON(url, function(data) {
         var rooms = data.rooms;
         for (var i=0; i<rooms.length; ++i) {
@@ -53,7 +53,7 @@ var getCurrentRoomList = function() {
 $('.createRoom').live('click', function() {
     var data = {};
     $.ajax({
-        url: "http://localhost:8080/matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
+        url: "http://localhost:8080/_matrix/client/api/v1/createRoom?access_token="+accountInfo.access_token,
         type: "POST",
         contentType: "application/json; charset=utf-8",
         data: JSON.stringify(data),
@@ -87,7 +87,7 @@ $('.changeMembership').live('click', function() {
         return;
     }
     
-    var url = "http://localhost:8080/matrix/client/api/v1/rooms/$roomid/$membership?access_token=$token";
+    var url = "http://localhost:8080/_matrix/client/api/v1/rooms/$roomid/$membership?access_token=$token";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$roomid", encodeURIComponent(roomId));
     url = url.replace("$membership", membership);
@@ -117,7 +117,7 @@ $('.changeMembership').live('click', function() {
 
 $('.joinAlias').live('click', function() {
     var roomAlias = $("#roomAlias").val();
-    var url = "http://localhost:8080/matrix/client/api/v1/join/$roomalias?access_token=$token";
+    var url = "http://localhost:8080/_matrix/client/api/v1/join/$roomalias?access_token=$token";
     url = url.replace("$token", accountInfo.access_token);
     url = url.replace("$roomalias", encodeURIComponent(roomAlias));
     $.ajax({
diff --git a/synapse/api/urls.py b/synapse/api/urls.py
index 05ca00078..3d0b5de96 100644
--- a/synapse/api/urls.py
+++ b/synapse/api/urls.py
@@ -15,7 +15,7 @@
 
 """Contains the URL paths to prefix various aspects of the server with. """
 
-CLIENT_PREFIX = "/matrix/client/api/v1"
-FEDERATION_PREFIX = "/matrix/federation/v1"
-WEB_CLIENT_PREFIX = "/matrix/client"
-CONTENT_REPO_PREFIX = "/matrix/content"
\ No newline at end of file
+CLIENT_PREFIX = "/_matrix/client/api/v1"
+FEDERATION_PREFIX = "/_matrix/federation/v1"
+WEB_CLIENT_PREFIX = "/_matrix/client"
+CONTENT_REPO_PREFIX = "/_matrix/content"
\ No newline at end of file
diff --git a/tests/federation/test_federation.py b/tests/federation/test_federation.py
index 938b57bec..51308ca35 100644
--- a/tests/federation/test_federation.py
+++ b/tests/federation/test_federation.py
@@ -87,7 +87,7 @@ class FederationTestCase(unittest.TestCase):
 
         # Empty context initially
         (code, response) = yield self.mock_resource.trigger("GET",
-                "/matrix/federation/v1/state/my-context/", None)
+                "/_matrix/federation/v1/state/my-context/", None)
         self.assertEquals(200, code)
         self.assertFalse(response["pdus"])
 
@@ -112,7 +112,7 @@ class FederationTestCase(unittest.TestCase):
         )
 
         (code, response) = yield self.mock_resource.trigger("GET",
-                "/matrix/federation/v1/state/my-context/", None)
+                "/_matrix/federation/v1/state/my-context/", None)
         self.assertEquals(200, code)
         self.assertEquals(1, len(response["pdus"]))
 
@@ -123,7 +123,7 @@ class FederationTestCase(unittest.TestCase):
         )
 
         (code, response) = yield self.mock_resource.trigger("GET",
-                "/matrix/federation/v1/pdu/red/abc123def456/", None)
+                "/_matrix/federation/v1/pdu/red/abc123def456/", None)
         self.assertEquals(404, code)
 
         # Now insert such a PDU
@@ -142,7 +142,7 @@ class FederationTestCase(unittest.TestCase):
         )
 
         (code, response) = yield self.mock_resource.trigger("GET",
-                "/matrix/federation/v1/pdu/red/abc123def456/", None)
+                "/_matrix/federation/v1/pdu/red/abc123def456/", None)
         self.assertEquals(200, code)
         self.assertEquals(1, len(response["pdus"]))
         self.assertEquals("m.text", response["pdus"][0]["pdu_type"])
@@ -168,7 +168,7 @@ class FederationTestCase(unittest.TestCase):
 
         self.mock_http_client.put_json.assert_called_with(
                 "remote",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data={
                     "ts": 1000000,
                     "origin": "test",
@@ -203,7 +203,7 @@ class FederationTestCase(unittest.TestCase):
         # MockClock ensures we can guess these timestamps
         self.mock_http_client.put_json.assert_called_with(
                 "remote",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data={
                     "origin": "test",
                     "ts": 1000000,
@@ -226,7 +226,7 @@ class FederationTestCase(unittest.TestCase):
         self.federation.register_edu_handler("m.test", recv_observer)
 
         yield self.mock_resource.trigger("PUT",
-                "/matrix/federation/v1/send/1001000/",
+                "/_matrix/federation/v1/send/1001000/",
                 """{
                     "origin": "remote",
                     "ts": 1001000,
@@ -261,7 +261,7 @@ class FederationTestCase(unittest.TestCase):
 
         self.mock_http_client.get_json.assert_called_with(
             destination="remote",
-            path="/matrix/federation/v1/query/a-question",
+            path="/_matrix/federation/v1/query/a-question",
             args={"one": "1", "two": "2"}
         )
 
@@ -273,7 +273,7 @@ class FederationTestCase(unittest.TestCase):
         self.federation.register_query_handler("a-question", recv_handler)
 
         code, response = yield self.mock_resource.trigger("GET",
-            "/matrix/federation/v1/query/a-question?three=3&four=4", None)
+            "/_matrix/federation/v1/query/a-question?three=3&four=4", None)
 
         self.assertEquals(200, code)
         self.assertEquals({"another": "response"}, response)
diff --git a/tests/handlers/test_presence.py b/tests/handlers/test_presence.py
index 0a176bdd4..451e1eaa2 100644
--- a/tests/handlers/test_presence.py
+++ b/tests/handlers/test_presence.py
@@ -314,7 +314,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("elsewhere",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("elsewhere", "m.presence_invite",
                     content={
                         "observer_user": "@apple:test",
@@ -340,7 +340,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("elsewhere",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("elsewhere", "m.presence_accept",
                     content={
                         "observer_user": "@cabbage:elsewhere",
@@ -352,7 +352,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
         )
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("elsewhere", "m.presence_invite",
                 content={
                     "observer_user": "@cabbage:elsewhere",
@@ -371,7 +371,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("elsewhere",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("elsewhere", "m.presence_deny",
                     content={
                         "observer_user": "@cabbage:elsewhere",
@@ -383,7 +383,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
         )
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("elsewhere", "m.presence_invite",
                 content={
                     "observer_user": "@cabbage:elsewhere",
@@ -397,7 +397,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def test_accepted_remote(self):
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("elsewhere", "m.presence_accept",
                 content={
                     "observer_user": "@apple:test",
@@ -415,7 +415,7 @@ class PresenceInvitesTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def test_denied_remote(self):
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("elsewhere", "m.presence_deny",
                 content={
                     "observer_user": "@apple:test",
@@ -720,7 +720,7 @@ class PresencePushTestCase(unittest.TestCase):
         self.assertEquals(self.event_source.get_current_key(), 0)
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("elsewhere", "m.presence",
                 content={
                     "push": [
@@ -836,7 +836,7 @@ class PresencePushTestCase(unittest.TestCase):
 
         put_json.expect_call_and_return(
             call("remote",
-                path="/matrix/federation/v1/send/1000002/",
+                path="/_matrix/federation/v1/send/1000002/",
                 data=_expect_edu("remote", "m.presence",
                     content={
                         "push": [
@@ -1130,7 +1130,7 @@ class PresencePollingTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("remote",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("remote", "m.presence",
                     content={
                         "push": [
@@ -1145,7 +1145,7 @@ class PresencePollingTestCase(unittest.TestCase):
         )
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("remote", "m.presence",
                 content={
                     "poll": [ "@banana:test" ],
@@ -1159,7 +1159,7 @@ class PresencePollingTestCase(unittest.TestCase):
         self.assertTrue(self.u_banana in self.handler._remote_sendmap)
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000001/",
+            "/_matrix/federation/v1/send/1000001/",
             _make_edu_json("remote", "m.presence",
                 content={
                     "unpoll": [ "@banana:test" ],
diff --git a/tests/handlers/test_typing.py b/tests/handlers/test_typing.py
index 300a6e340..c3c98074c 100644
--- a/tests/handlers/test_typing.py
+++ b/tests/handlers/test_typing.py
@@ -166,7 +166,7 @@ class TypingNotificationsTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("farm",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("farm", "m.typing",
                     content={
                         "room_id": self.room_id,
@@ -192,7 +192,7 @@ class TypingNotificationsTestCase(unittest.TestCase):
         self.room_members = [self.u_apple, self.u_onion]
 
         yield self.mock_federation_resource.trigger("PUT",
-            "/matrix/federation/v1/send/1000000/",
+            "/_matrix/federation/v1/send/1000000/",
             _make_edu_json("farm", "m.typing",
                 content={
                     "room_id": self.room_id,
@@ -216,7 +216,7 @@ class TypingNotificationsTestCase(unittest.TestCase):
         put_json = self.mock_http_client.put_json
         put_json.expect_call_and_return(
             call("farm",
-                path="/matrix/federation/v1/send/1000000/",
+                path="/_matrix/federation/v1/send/1000000/",
                 data=_expect_edu("farm", "m.typing",
                     content={
                         "room_id": self.room_id,
diff --git a/tests/rest/test_events.py b/tests/rest/test_events.py
index 3099a24e8..1d1336d12 100644
--- a/tests/rest/test_events.py
+++ b/tests/rest/test_events.py
@@ -36,7 +36,7 @@ from mock import Mock
 
 logging.getLogger().addHandler(logging.NullHandler())
 
-PATH_PREFIX = "/matrix/client/api/v1"
+PATH_PREFIX = "/_matrix/client/api/v1"
 
 
 class EventStreamPaginationApiTestCase(unittest.TestCase):
diff --git a/tests/rest/test_presence.py b/tests/rest/test_presence.py
index 6631b7797..61692f02c 100644
--- a/tests/rest/test_presence.py
+++ b/tests/rest/test_presence.py
@@ -37,7 +37,7 @@ ONLINE = PresenceState.ONLINE
 
 
 myid = "@apple:test"
-PATH_PREFIX = "/matrix/client/api/v1"
+PATH_PREFIX = "/_matrix/client/api/v1"
 
 
 class JustPresenceHandlers(object):
diff --git a/tests/rest/test_profile.py b/tests/rest/test_profile.py
index 9bd8dc978..24456769c 100644
--- a/tests/rest/test_profile.py
+++ b/tests/rest/test_profile.py
@@ -26,7 +26,7 @@ from synapse.api.errors import SynapseError, AuthError
 from synapse.server import HomeServer
 
 myid = "@1234ABCD:test"
-PATH_PREFIX = "/matrix/client/api/v1"
+PATH_PREFIX = "/_matrix/client/api/v1"
 
 class ProfileTestCase(unittest.TestCase):
     """ Tests profile management. """
diff --git a/tests/rest/test_rooms.py b/tests/rest/test_rooms.py
index 914dc28f5..b432cf254 100644
--- a/tests/rest/test_rooms.py
+++ b/tests/rest/test_rooms.py
@@ -32,7 +32,7 @@ from .utils import RestTestCase
 
 from mock import Mock
 
-PATH_PREFIX = "/matrix/client/api/v1"
+PATH_PREFIX = "/_matrix/client/api/v1"
 
 
 class RoomPermissionsTestCase(RestTestCase):
diff --git a/webclient/components/fileUpload/file-upload-service.js b/webclient/components/fileUpload/file-upload-service.js
index 5f01478fd..699a3cbff 100644
--- a/webclient/components/fileUpload/file-upload-service.js
+++ b/webclient/components/fileUpload/file-upload-service.js
@@ -30,7 +30,7 @@ angular.module('mFileUpload', ['matrixService', 'mUtilities'])
      */
     this.uploadFile = function(file) {
         var deferred = $q.defer();
-        console.log("Uploading " + file.name + "... to /matrix/content");
+        console.log("Uploading " + file.name + "... to /_matrix/content");
         matrixService.uploadContent(file).then(
             function(response) {
                 var content_url = response.data.content_token;
diff --git a/webclient/components/matrix/matrix-service.js b/webclient/components/matrix/matrix-service.js
index 746442c28..d509c20b0 100644
--- a/webclient/components/matrix/matrix-service.js
+++ b/webclient/components/matrix/matrix-service.js
@@ -38,7 +38,7 @@ angular.module('matrixService', [])
     
     // Current version of permanent storage
     var configVersion = 0;
-    var prefixPath = "/matrix/client/api/v1";
+    var prefixPath = "/_matrix/client/api/v1";
     var MAPPING_PREFIX = "alias_for_";
 
     var doRequest = function(method, path, params, data, $httpParams) {
@@ -168,7 +168,7 @@ angular.module('matrixService', [])
 
         // Retrieves the room ID corresponding to a room alias
         resolveRoomAlias:function(room_alias) {
-            var path = "/matrix/client/api/v1/directory/room/$room_alias";
+            var path = "/_matrix/client/api/v1/directory/room/$room_alias";
             room_alias = encodeURIComponent(room_alias);
 
             path = path.replace("$room_alias", room_alias);
@@ -308,7 +308,7 @@ angular.module('matrixService', [])
 
         // hit the Identity Server for a 3PID request.
         linkEmail: function(email, clientSecret, sendAttempt) {
-            var path = "/matrix/identity/api/v1/validate/email/requestToken"
+            var path = "/_matrix/identity/api/v1/validate/email/requestToken"
             var data = "clientSecret="+clientSecret+"&email=" + encodeURIComponent(email)+"&sendAttempt="+sendAttempt;
             var headers = {};
             headers["Content-Type"] = "application/x-www-form-urlencoded";
@@ -316,7 +316,7 @@ angular.module('matrixService', [])
         },
 
         authEmail: function(clientSecret, tokenId, code) {
-            var path = "/matrix/identity/api/v1/validate/email/submitToken";
+            var path = "/_matrix/identity/api/v1/validate/email/submitToken";
             var data = "token="+code+"&sid="+tokenId+"&clientSecret="+clientSecret;
             var headers = {};
             headers["Content-Type"] = "application/x-www-form-urlencoded";
@@ -324,7 +324,7 @@ angular.module('matrixService', [])
         },
 
         bindEmail: function(userId, tokenId, clientSecret) {
-            var path = "/matrix/identity/api/v1/3pid/bind";
+            var path = "/_matrix/identity/api/v1/3pid/bind";
             var data = "mxid="+encodeURIComponent(userId)+"&sid="+tokenId+"&clientSecret="+clientSecret;
             var headers = {};
             headers["Content-Type"] = "application/x-www-form-urlencoded";
@@ -332,7 +332,7 @@ angular.module('matrixService', [])
         },
         
         uploadContent: function(file) {
-            var path = "/matrix/content";
+            var path = "/_matrix/content";
             var headers = {
                 "Content-Type": undefined // undefined means angular will figure it out
             };