diff --git a/bin/addons/__init__.py b/bin/addons/__init__.py
index e43b91a97b0..8bcb50d27a9 100644
--- a/bin/addons/__init__.py
+++ b/bin/addons/__init__.py
@@ -272,6 +272,17 @@ def get_modules():
 
     return list(set(listdir(ad) + listdir(_ad)))
 
+def get_modules_with_version():
+    modules = get_modules()
+    res = {}
+    for module in modules:
+        terp = get_module_resource(module, '__terp__.py')
+        try:
+            info = eval(tools.file_open(terp).read())
+            res[module] = "%s.%s" % (release.major_version, info['version'])
+        except Exception, e:
+            continue
+    return res
 
 def create_graph(cr, module_list, force=None):
     graph = Graph()
diff --git a/bin/service/web_services.py b/bin/service/web_services.py
index 10a11a4819f..b8b5a8e1bee 100644
--- a/bin/service/web_services.py
+++ b/bin/service/web_services.py
@@ -320,6 +320,7 @@ class common(netsvc.Service):
         self.exportMethod(self.login)
         self.exportMethod(self.logout)
         self.exportMethod(self.timezone_get)
+        self.exportMethod(self.get_available_updates)
         self.exportMethod(self.get_migration_scripts)
 
     def ir_set(self, db, uid, password, keys, args, name, value, replace=True, isobject=False):
@@ -385,12 +386,26 @@ GNU Public Licence.
     def timezone_get(self, db, login, password):
         return time.tzname[0]
 
+    
+    def get_available_updates(self, password, contract_id, contract_password):
+        security.check_super(password)
+        import tools.maintenance as tm
+        try:
+            rc = tm.remote_contract(contract_id, contract_password)
+            if not rc.id:
+                raise tm.RemoteContractException('This contract does not exist or is not active') 
+            
+            return rc.get_available_updates(rc.id, addons.get_modules_with_version())
+
+        except tm.RemoteContractException, e:
+            self.abortResponse(1, 'Migration Error', 'warning', str(e))
+        
 
     def get_migration_scripts(self, password, contract_id, contract_password):
         security.check_super(password)
         l = netsvc.Logger()
+        import tools.maintenance as tm
         try: 
-            import tools.maintenance as tm
             rc = tm.remote_contract(contract_id, contract_password)
             if not rc.id:
                 raise tm.RemoteContractException('This contract does not exist or is not active')