diff --git a/precalc-api.json b/precalc-api.json
index ed4ecb2..9ebe256 100644
--- a/precalc-api.json
+++ b/precalc-api.json
@@ -118,7 +118,7 @@
           "content": {
             "application/json": {
               "schema": {
-                "$ref": "#/components/schemas/ExternalPrecalcRequestDto"
+                "$ref": "#/components/schemas/RequestV1"
               }
             }
           },
@@ -182,30 +182,150 @@
   },
   "components": {
     "schemas": {
-      "ResponseContainerDto": {
+      "RequestV1": {
         "required": [
-          "message",
-          "status"
+          "merchantId",
+          "fromCurrency",
+          "toCurrency"
         ],
         "type": "object",
         "properties": {
-          "response": {
-            "$ref": "#/components/schemas/ResponseDto"
-          },
-          "status": {
+          "merchantId": {
             "type": "string",
-            "description": "Status of performed operation",
-            "enum": [
-              "OK",
-              "ERROR"
-            ]
+            "description": "Merchant ID"
           },
-          "message": {
+          "methodId": {
             "type": "string",
-            "description": "Error message when occurred, 'OK' otherwise"
+            "description": "Payment method type id"
+          },
+          "fromCountry": {
+            "type": "string",
+            "description": "Source country (ISO Alpha2 code)"
+          },
+          "fromCurrency": {
+            "type": "string",
+            "description": "Source currency (ISO code)"
+          },
+          "fromAmount": {
+            "type": "number",
+            "description": "Source amount (one of fromAmount and toAmount must be specified)"
+          },
+          "toCountry": {
+            "type": "string",
+            "description": "Destination country (ISO Alpa2 code)"
+          },
+          "toCurrency": {
+            "type": "string",
+            "description": "Destination currency (ISO code)"
+          },
+          "toAmount": {
+            "type": "number",
+            "description": "Destination amount (one of fromAmount and toAmount must be specified)"
+          },
+          "externalId": {
+            "maxLength": 1000,
+            "minLength": 0,
+            "type": "string",
+            "description": "Merchant's marketing ID (this ID will be placed at utm_campaign further)"
           }
         },
-        "description": "Response container"
+        "description": "Request for payment calculation (either 'fromAmount' or 'toAmount' must be specified)"
+      },
+      "ExternalPrecalcRequestDto": {
+        "required": [
+          "merchantId",
+          "fromCurrency",
+          "toCurrency",
+          "fromCountry",
+          "toCountry"
+        ],
+        "type": "object",
+        "properties": {
+          "merchantId": {
+            "type": "string",
+            "description": "Merchant ID"
+          },
+          "methodId": {
+            "type": "string",
+            "description": "Payment method type id"
+          },
+          "fromCountry": {
+            "type": "string",
+            "description": "Source country (ISO Alpha2 code)"
+          },
+          "fromCurrency": {
+            "type": "string",
+            "description": "Source currency (ISO code)"
+          },
+          "fromAmount": {
+            "type": "number",
+            "description": "Source amount (one of fromAmount and toAmount must be specified)"
+          },
+          "toCountry": {
+            "type": "string",
+            "description": "Destination country (ISO Alpa2 code)"
+          },
+          "toCurrency": {
+            "type": "string",
+            "description": "Destination currency (ISO code)"
+          },
+          "toAmount": {
+            "type": "number",
+            "description": "Destination amount (one of fromAmount and toAmount must be specified)"
+          },
+          "externalId": {
+            "maxLength": 1000,
+            "minLength": 0,
+            "type": "string",
+            "description": "Merchant's marketing ID (this ID will be placed at utm_campaign further)"
+          }
+        },
+        "description": "Request for payment calculation (either 'fromAmount' or 'toAmount' must be specified)"
+      },
+      "RequestV3": {
+        "required": [
+          "merchantId",
+          "fromCurrency",
+          "toCurrency",
+          "fromCountry",
+          "toCountry"
+        ],
+        "type": "object",
+        "properties": {
+          "merchantId": {
+            "type": "string",
+            "description": "Merchant ID"
+          },
+          "methodId": {
+            "type": "string",
+            "description": "Payment method type id"
+          },
+          "fromCountry": {
+            "type": "string",
+            "description": "Source country (ISO Alpha2 code)"
+          },
+          "fromCurrency": {
+            "type": "string",
+            "description": "Source currency (ISO code)"
+          },
+          "fromAmount": {
+            "type": "number",
+            "description": "Source amount (one of fromAmount and toAmount must be specified)"
+          },
+          "toCountry": {
+            "type": "string",
+            "description": "Destination country (ISO Alpa2 code)"
+          },
+          "toCurrency": {
+            "type": "string",
+            "description": "Destination currency (ISO code)"
+          },
+          "toAmount": {
+            "type": "number",
+            "description": "Destination amount (one of fromAmount and toAmount must be specified)"
+          }
+        },
+        "description": "Request for payment calculation (either 'fromAmount' or 'toAmount' must be specified)"
       },
       "ResponseDto": {
         "type": "object",
@@ -257,6 +377,31 @@
         },
         "description": "Payment calculation result"
       },
+      "ResponseContainerDto": {
+        "required": [
+          "message",
+          "status"
+        ],
+        "type": "object",
+        "properties": {
+          "response": {
+            "$ref": "#/components/schemas/ResponseDto"
+          },
+          "status": {
+            "type": "string",
+            "description": "Status of performed operation",
+            "enum": [
+              "OK",
+              "ERROR"
+            ]
+          },
+          "message": {
+            "type": "string",
+            "description": "Error message when occurred, 'OK' otherwise"
+          }
+        },
+        "description": "Response container"
+      },
       "ResponseDtoV3": {
         "type": "object",
         "properties": {
@@ -314,98 +459,6 @@
           }
         }
       },
-      "ExternalPrecalcRequestDto": {
-        "required": [
-          "merchantId",
-          "fromCurrency",
-          "toCurrency"
-        ],
-        "type": "object",
-        "properties": {
-          "merchantId": {
-            "type": "string",
-            "description": "Merchant ID"
-          },
-          "methodId": {
-            "type": "string",
-            "description": "Payment method type id"
-          },
-          "fromCountry": {
-            "type": "string",
-            "description": "Source country (ISO Alpha2 code)"
-          },
-          "fromCurrency": {
-            "type": "string",
-            "description": "Source currency (ISO code)"
-          },
-          "fromAmount": {
-            "type": "number",
-            "description": "Source amount (one of fromAmount and toAmount must be specified)"
-          },
-          "toCountry": {
-            "type": "string",
-            "description": "Destination country (ISO Alpa2 code)"
-          },
-          "toCurrency": {
-            "type": "string",
-            "description": "Destination currency (ISO code)"
-          },
-          "toAmount": {
-            "type": "number",
-            "description": "Destination amount (one of fromAmount and toAmount must be specified)"
-          },
-          "externalId": {
-            "maxLength": 1000,
-            "minLength": 0,
-            "type": "string",
-            "description": "Merchant's marketing ID (this ID will be placed at utm_campaign further)"
-          }
-        },
-        "description": "Request for payment calculation (either 'fromAmount' or 'toAmount' must be specified)"
-      },
-      "RequestV3": {
-        "required": [
-          "merchantId",
-          "fromCurrency",
-          "toCurrency"
-        ],
-        "type": "object",
-        "properties": {
-          "merchantId": {
-            "type": "string",
-            "description": "Merchant ID"
-          },
-          "methodId": {
-            "type": "string",
-            "description": "Payment method type id"
-          },
-          "fromCountry": {
-            "type": "string",
-            "description": "Source country (ISO Alpha2 code)"
-          },
-          "fromCurrency": {
-            "type": "string",
-            "description": "Source currency (ISO code)"
-          },
-          "fromAmount": {
-            "type": "number",
-            "description": "Source amount (one of fromAmount and toAmount must be specified)"
-          },
-          "toCountry": {
-            "type": "string",
-            "description": "Destination country (ISO Alpa2 code)"
-          },
-          "toCurrency": {
-            "type": "string",
-            "description": "Destination currency (ISO code)"
-          },
-          "toAmount": {
-            "type": "number",
-            "description": "Destination amount (one of fromAmount and toAmount must be specified)"
-          }
-        },
-        "description": "Request for payment calculation (either 'fromAmount' or 'toAmount' must be specified)"
-      },
       "CorridorDescriptorDto": {
         "type": "object",
         "properties": {