diff --git a/pms_api_rest/services/pms_availability_plan_service.py b/pms_api_rest/services/pms_availability_plan_service.py
index 7f6370c29..b96606fbc 100644
--- a/pms_api_rest/services/pms_availability_plan_service.py
+++ b/pms_api_rest/services/pms_availability_plan_service.py
@@ -1,6 +1,6 @@
 from datetime import datetime, timedelta
 
-from odoo.exceptions import MissingError
+from odoo.exceptions import MissingError, ValidationError
 
 from odoo.addons.base_rest import restapi
 from odoo.addons.base_rest_datamodel.restapi import Datamodel
@@ -183,21 +183,7 @@ class PmsAvailabilityPlanService(Component):
 
         return result
 
-    @restapi.method(
-        [
-            (
-                [
-                    "/<int:availability_plan_id>/availability-plan-rules",
-                ],
-                "POST",
-            )
-        ],
-        input_param=Datamodel("pms.availability.plan.rules.info", is_list=False),
-        auth="jwt_api_pms",
-    )
-    def create_availability_plan_rule(
-        self, availability_plan_id, pms_avail_plan_rules_info
-    ):
+    def _create_or_update_avail_plan_rules(self, pms_avail_plan_rules_info):
         for avail_plan_rule in pms_avail_plan_rules_info.availabilityPlanRules:
             vals = dict()
             date = datetime.strptime(avail_plan_rule.date, "%Y-%m-%d").date()
@@ -239,3 +225,41 @@ class PmsAvailabilityPlanService(Component):
                     }
                 )
                 self.env["pms.availability.plan.rule"].create(vals)
+
+    @restapi.method(
+        [
+            (
+                [
+                    "/<int:availability_plan_id>/availability-plan-rules",
+                ],
+                "PATCH",
+            )
+        ],
+        input_param=Datamodel("pms.availability.plan.rules.info", is_list=False),
+        auth="jwt_api_pms",
+    )
+    def create_availability_plan_rule(self, availability_plan_id, pms_avail_plan_rules_info):
+        availability_plan_ids = list(
+            {
+                item.availabilityPlanId for item in pms_avail_plan_rules_info.availabilityPlanRules
+            }
+        )
+        if len(availability_plan_ids) > 1 or availability_plan_ids[0] != availability_plan_id:
+            raise ValidationError("You cannot create availability plan rules for different availability plans")
+        else:
+            self._create_or_update_avail_plan_rules(pms_avail_plan_rules_info)
+
+    @restapi.method(
+        [
+            (
+                [
+                    "/batch-changes",
+                ],
+                "POST",
+            )
+        ],
+        input_param=Datamodel("pms.availability.plan.rules.info", is_list=False),
+        auth="jwt_api_pms",
+    )
+    def update_availability_plan_rules(self, pms_avail_plan_rules_info):
+        self._create_or_update_avail_plan_rules(pms_avail_plan_rules_info)
diff --git a/pms_api_rest/services/pms_pricelist_service.py b/pms_api_rest/services/pms_pricelist_service.py
index 538cac390..40378ff0b 100644
--- a/pms_api_rest/services/pms_pricelist_service.py
+++ b/pms_api_rest/services/pms_pricelist_service.py
@@ -143,19 +143,7 @@ class PmsPricelistService(Component):
                 result.append(pricelist_info)
         return result
 
-    @restapi.method(
-        [
-            (
-                [
-                    "/<int:pricelist_id>/pricelist-items",
-                ],
-                "POST",
-            )
-        ],
-        input_param=Datamodel("pms.pricelist.items.info", is_list=False),
-        auth="jwt_api_pms",
-    )
-    def create_pricelist_item(self, pricelist_id, pms_pricelist_item_info):
+    def _create_or_update_pricelist_items(self, pms_pricelist_item_info):
         for pms_pricelist_item in pms_pricelist_item_info.pricelistItems:
             date = datetime.strptime(pms_pricelist_item.date, "%Y-%m-%d").date()
             product_id = (
@@ -191,3 +179,53 @@ class PmsPricelistService(Component):
                         "pricelist_id": pms_pricelist_item.pricelistId,
                     }
                 )
+
+    @restapi.method(
+        [
+            (
+                [
+                    "/<int:pricelist_id>/pricelist-items",
+                ],
+                "PATCH",
+            )
+        ],
+        input_param=Datamodel("pms.pricelist.items.info", is_list=False),
+        auth="jwt_api_pms",
+    )
+    def create_pricelist_item(self, pricelist_id, pms_pricelist_item_info):
+        self._create_or_update_pricelist_items(pms_pricelist_item_info)
+
+    @restapi.method(
+        [
+            (
+                [
+                    "/<int:pricelist_id>/pricelist-items",
+                ],
+                "PATCH",
+            )
+        ],
+        input_param=Datamodel("pms.pricelist.items.info", is_list=False),
+        auth="jwt_api_pms",
+    )
+    def create_pricelist_item(self, pricelist_id, pms_pricelist_item_info):
+        pricelist_ids = list({item.pricelistId for item in pms_pricelist_item_info.pricelistItems})
+        print(pricelist_ids)
+        if len(pricelist_ids) > 1 or pricelist_ids[0] != pricelist_id:
+            raise ValidationError("You cannot create pricelist items for different pricelists at once.")
+        else:
+            self._create_or_update_pricelist_items(pms_pricelist_item_info)
+
+    @restapi.method(
+        [
+            (
+                [
+                    "/batch-changes",
+                ],
+                "POST",
+            )
+        ],
+        input_param=Datamodel("pms.pricelist.items.info", is_list=False),
+        auth="jwt_api_pms",
+    )
+    def update_availability_plan_rules(self, pms_avail_plan_rules_info):
+        self._create_or_update_pricelist_items(pms_avail_plan_rules_info)