diff --git a/OAS3.yml b/OAS3.yml
index 6db74eb..47710e3 100644
--- a/OAS3.yml
+++ b/OAS3.yml
@@ -93,9 +93,6 @@ components:
                 type: string
               message:
                 type: string
-              "type":
-                type: string
-                enum: ["ERR", "WARN"]
   responses:
     AuthenticationRequired:
       description: Authentication is required (401)
diff --git a/app.py b/app.py
index 3515974..96a27ef 100644
--- a/app.py
+++ b/app.py
@@ -68,11 +68,27 @@ class Oas3Handler(tornado.web.RequestHandler, metaclass=ABCMeta):
         self.finish()
 
 
-def make_app(_auth_provider=None):
+class ValidateHandler(tornado.web.RequestHandler, metaclass=ABCMeta):
+    def post(self):
+        self.set_header("Content-Type", "application/json")
+
+        entity = self.request.body.decode()
+
+        # TODO call validator
+        validation_result = {
+            "valid": "true"
+        }
+
+        self.write(validation_result)
+        self.finish()
+
+
+def make_app():
     version_path = r"/v[0-9]"
     return tornado.web.Application([
         (version_path + r"/health", HealthHandler),
         (version_path + r"/oas3", Oas3Handler),
+        (version_path + r"/validate", ValidateHandler),
     ])
 
 
@@ -81,7 +97,7 @@ def main():
 
     # Setup
 
-    util.run_tornado_server(make_app(auth_provider),
+    util.run_tornado_server(make_app(),
                             server_port=port)
 
     # Teardown
diff --git a/test.py b/test.py
index 84a6315..ee268d3 100644
--- a/test.py
+++ b/test.py
@@ -38,5 +38,25 @@ class TestBaseAPI(tornado.testing.AsyncHTTPTestCase):
             self.assertEqual(response.body.decode(), oas3f.read(), "OAS3 content differs from spec file!")
 
 
+class TestValidation(tornado.testing.AsyncHTTPTestCase):
+    """Validation test cases"""
+    def get_app(self):
+        return make_app()
+
+    def test_null_validation(self):
+        entity = {}
+
+        response = self.fetch('/v0/validate',
+                              method='POST',
+                              body=json.dumps(entity))
+
+        self.assertEqual(200, response.code, "Validation must always return 200")
+
+        validation_result = json.loads(response.body.decode())
+
+        self.assertIn('valid', validation_result, "Key 'valid' expected in validation result")
+        self.assertTrue(validation_result['valid'], "Validation result is expected to be valid==true")
+
+
 if __name__ == "__main__":
     unittest.main()