diff --git a/osm_nbi/instance_topics.py b/osm_nbi/instance_topics.py
index 62df4f8..57c7232 100644
--- a/osm_nbi/instance_topics.py
+++ b/osm_nbi/instance_topics.py
@@ -30,6 +30,7 @@
     ns_heal,
     nsi_instantiate,
     ns_migrate,
+    ns_verticalscale,
 )
 from osm_nbi.base_topic import (
     BaseTopic,
@@ -1167,6 +1168,7 @@
         "heal": ns_heal,
         "terminate": ns_terminate,
         "migrate": ns_migrate,
+        "verticalscale": ns_verticalscale,
     }
 
     def __init__(self, db, fs, msg, auth):
diff --git a/osm_nbi/nbi.py b/osm_nbi/nbi.py
index de48c03..d78379f 100644
--- a/osm_nbi/nbi.py
+++ b/osm_nbi/nbi.py
@@ -461,6 +461,10 @@
                         "METHODS": ("POST",),
                         "ROLE_PERMISSION": "ns_instances:id:update:",
                     },
+                    "verticalscale": {
+                        "METHODS": ("POST",),
+                        "ROLE_PERMISSION": "ns_instances:id:verticalscale:"
+                           },
                 },
             },
             "ns_lcm_op_occs": {
diff --git a/osm_nbi/validation.py b/osm_nbi/validation.py
index f9213d8..6ed6fba 100644
--- a/osm_nbi/validation.py
+++ b/osm_nbi/validation.py
@@ -613,6 +613,29 @@
     "additionalProperties": False,
 }
 
+ns_verticalscale = {
+    "title": "vertial scale input schema",
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "type": "object",
+    "properties": {
+        "lcmOperationType": string_schema,
+        "nsInstanceId": id_schema,
+        "vnfInstanceId": id_schema,
+        "migrateToHost": string_schema,
+        "vdu": {
+            "type": "object",
+                "properties": {
+                    "vduId": name_schema,
+                    "vduCountIndex": integer0_schema,
+                },
+                "required": ["vduId"],
+                "additionalProperties": False,
+        },
+    },
+    "required": ["vnfInstanceId"],
+    "additionalProperties": False
+}
+
 schema_version = {"type": "string", "enum": ["1.0"]}
 schema_type = {"type": "string"}
 vim_type = shortname_schema  # {"enum": ["openstack", "openvim", "vmware", "opennebula", "aws", "azure", "fos"]}