diff --git a/src/grpc_client/models_accessor.py b/src/grpc_client/models_accessor.py
new file mode 100644
index 0000000..29c2f11
--- /dev/null
+++ b/src/grpc_client/models_accessor.py
@@ -0,0 +1,34 @@
+from resources import RESOURCES
+
+class GRPCModelsAccessor:
+    """
+    This class provide the glue between the models managed by TOSCA and the ones living in xos-core
+    """
+
+    @staticmethod
+    def get_model_from_classname(class_name, data):
+        """
+        Give a Model Class Name and some data, check if that exits or instantiate a new one
+        """
+
+
+        if data.get('name'):
+            used_key = 'name'
+        else:
+            used_key = data.keys()[0]
+
+        if class_name not in RESOURCES:
+            raise Exception('[XOS-TOSCA] The model your tring to create (%s: %s, class: %s) is not know by xos-core' % (used_key, data[used_key], class_name))
+
+        cls = RESOURCES[class_name]
+        models = cls.objects.filter(**{used_key: data[used_key]})
+
+        if len(models) == 1:
+            print "[XOS-Tosca] Model %s already exist, retrieving instance..." % data[used_key]
+            model = models[0]
+        elif len(models) == 0:
+            model = cls.objects.new()
+            print "[XOS-Tosca] Model %s is new, creating new instance..." % data[used_key]
+        else:
+            raise Exception("[XOS-Tosca] Model %s has multiple instances, I can't handle it" % data[used_key])
+        return model
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