diff --git a/src/domains/gps-app/api/payments-service/v1/rest/external/_openapi.json.tpl b/src/domains/gps-app/api/payments-service/v1/rest/external/_openapi.json.tpl
index 254ce01c84..821a58b2e2 100644
--- a/src/domains/gps-app/api/payments-service/v1/rest/external/_openapi.json.tpl
+++ b/src/domains/gps-app/api/payments-service/v1/rest/external/_openapi.json.tpl
@@ -4,7 +4,7 @@
     "title": "PagoPA API Payments",
     "description": "Payments",
     "termsOfService": "https://www.pagopa.gov.it/",
-    "version": "0.8.0-1-PAGOPA-1140-sviluppo-gpd-payments-gestione-enti-pluri-intermediati"
+    "version": "0.12.29-3-sampling"
   },
   "servers": [
     {
@@ -155,24 +155,25 @@
           {
             "name": "pageNum",
             "in": "query",
-            "description": "Page number",
-            "required": true,
+            "description": "Page number, starts from 0",
+            "required": false,
             "schema": {
               "minimum": 0,
               "type": "integer",
-              "format": "int32"
+              "format": "int32",
+              "default": 0
             }
           },
           {
             "name": "pageSize",
             "in": "query",
-            "description": "Number of elements per page. Default = 50",
+            "description": "Number of elements per page. Default = 20",
             "required": false,
             "schema": {
               "maximum": 100,
               "type": "integer",
               "format": "int32",
-              "default": 50
+              "default": 20
             }
           },
           {
@@ -210,6 +211,25 @@
             "schema": {
               "type": "string"
             }
+          },
+          {
+            "name": "segregationCodes",
+            "in": "query",
+            "description": "Segregation codes for which broker is authorized",
+            "required": false,
+            "schema": {
+              "pattern": "\\d{2}(,\\d{2})*",
+              "type": "string"
+            }
+          },
+          {
+            "name": "debtorOrIuv",
+            "in": "query",
+            "description": "Filter start of debtor or IUV",
+            "required": false,
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
@@ -226,7 +246,7 @@
             "content": {
               "application/json": {
                 "schema": {
-                  "$ref": "#/components/schemas/ReceiptsInfo"
+                  "$ref": "#/components/schemas/PaymentsResult"
                 }
               }
             }
@@ -326,6 +346,16 @@
               "type": "string"
             },
             "example": "ABC123"
+          },
+          {
+            "name": "segregationCodes",
+            "in": "query",
+            "description": "Segregation codes for which broker is authorized",
+            "required": false,
+            "schema": {
+              "pattern": "\\d{2}(,\\d{2})*",
+              "type": "string"
+            }
           }
         ],
         "responses": {
@@ -468,36 +498,25 @@
           }
         }
       },
-      "ReceiptModelResponse": {
+      "PaymentsResult": {
         "type": "object",
         "properties": {
-          "organizationFiscalCode": {
-            "type": "string"
-          },
-          "iuv": {
-            "type": "string"
+          "currentPageNumber": {
+            "type": "integer",
+            "format": "int32"
           },
-          "debtor": {
-            "type": "string"
+          "length": {
+            "type": "integer",
+            "format": "int32"
           },
-          "paymentDateTime": {
-            "type": "string"
+          "totalPages": {
+            "type": "integer",
+            "format": "int32"
           },
-          "status": {
-            "type": "string"
-          }
-        }
-      },
-      "ReceiptsInfo": {
-        "required": [
-          "receipts_list"
-        ],
-        "type": "object",
-        "properties": {
-          "receipts_list": {
+          "results": {
             "type": "array",
             "items": {
-              "$ref": "#/components/schemas/ReceiptModelResponse"
+              "type": "object"
             }
           }
         }