diff --git a/.secrets.baseline b/.secrets.baseline
index 0a39759..e2c4104 100644
--- a/.secrets.baseline
+++ b/.secrets.baseline
@@ -137,5 +137,5 @@
       }
     ]
   },
-  "generated_at": "2025-05-16T12:57:35Z"
+  "generated_at": "2025-07-27T08:05:02Z"
 }
diff --git a/examples/assets.py b/examples/assets.py
index 3b44347..6588dc1 100644
--- a/examples/assets.py
+++ b/examples/assets.py
@@ -5,6 +5,7 @@
 from finam_trade_api import Client, TokenManager
 
 token = os.getenv("TOKEN")
+account_id = os.getenv("ACCOUNT_ID")
 underlying_symbol = "YDEX@RTSX"
 instrument_symbol = "YDEX@MISX"
 
@@ -23,9 +24,9 @@ async def main():
     except NotImplementedError as e:
         print("Метод get_assets не реализован:", e)
 
-    pprint(await client.assets.get_asset(instrument_symbol, "1346867"))
+    pprint(await client.assets.get_asset(instrument_symbol, account_id))
 
-    await client.assets.get_asset_params(instrument_symbol, "1346867")
+    await client.assets.get_asset_params(instrument_symbol, account_id)
 
 
 if __name__ == "__main__":
diff --git a/finam_trade_api/access/model.py b/finam_trade_api/access/model.py
index e340f35..465f9f5 100644
--- a/finam_trade_api/access/model.py
+++ b/finam_trade_api/access/model.py
@@ -4,8 +4,8 @@
 
 
 class MDPermission(BaseModel):
-    quoteLevel: str
-    delayMinutes: int
+    quote_level: str
+    delay_minutes: int
     mic: str
     country: str | None = None
     continent: str | None = None
@@ -13,7 +13,7 @@ class MDPermission(BaseModel):
 
 
 class TokenDetailsResponse(BaseModel):
-    createdAt: datetime
-    expiresAt: datetime
-    mdPermissions: list[MDPermission]
-    accountIds: list[str]
+    created_at: datetime
+    expires_at: datetime
+    md_permissions: list[MDPermission]
+    account_ids: list[str]
diff --git a/finam_trade_api/account/__init__.py b/finam_trade_api/account/__init__.py
index d562f6f..fd5b072 100644
--- a/finam_trade_api/account/__init__.py
+++ b/finam_trade_api/account/__init__.py
@@ -6,7 +6,6 @@
     GetTradesResponse,
     GetTransactionsRequest,
     GetTransactionsResponse,
-    MoneyChange,
     Position,
     Trade,
     Transaction,
diff --git a/finam_trade_api/account/model.py b/finam_trade_api/account/model.py
index 7ad0b7d..ecbb2ee 100644
--- a/finam_trade_api/account/model.py
+++ b/finam_trade_api/account/model.py
@@ -2,24 +2,24 @@
 
 from pydantic import BaseModel, Field
 
-from finam_trade_api.base_client.models import FinamDecimal
+from finam_trade_api.base_client.models import FinamDecimal, FinamMoney
 
 
 class Position(BaseModel):
     symbol: str
     quantity: FinamDecimal
-    averagePrice: FinamDecimal
-    currentPrice: FinamDecimal
+    average_price: FinamDecimal
+    current_price: FinamDecimal
 
 
 class GetAccountResponse(BaseModel):
-    accountId: str
+    account_id: str
     type: str
     status: str
     equity: FinamDecimal
-    unrealizedProfit: FinamDecimal
+    unrealized_profit: FinamDecimal
     positions: list[Position] = Field(default_factory=list)
-    cash: list = Field(default_factory=list)  # todo не задокументировано
+    cash: list[FinamMoney] = Field(default_factory=list)
 
 
 class GetTransactionsRequest(BaseModel):
@@ -33,16 +33,10 @@ class GetTradesRequest(GetTransactionsRequest):
     ...
 
 
-class MoneyChange(BaseModel):
-    currencyCode: str
-    units: str
-    nanos: int
-
-
 class Trade(BaseModel):
     size: FinamDecimal
     price: FinamDecimal
-    accruedInterest: FinamDecimal
+    accrued_interest: FinamDecimal
 
 
 class Transaction(BaseModel):
@@ -50,7 +44,7 @@ class Transaction(BaseModel):
     category: str
     timestamp: str
     symbol: str
-    change: MoneyChange | None = None
+    change: FinamMoney | None = None
     trade: Trade | None = None
 
 
@@ -59,7 +53,7 @@ class GetTransactionsResponse(BaseModel):
 
 
 class AccountTrade(BaseModel):
-    tradeId: str
+    trade_id: str
     symbol: str
     price: FinamDecimal
     size: FinamDecimal
diff --git a/finam_trade_api/assets/model.py b/finam_trade_api/assets/model.py
index 63323c3..4fd6ffc 100644
--- a/finam_trade_api/assets/model.py
+++ b/finam_trade_api/assets/model.py
@@ -17,9 +17,9 @@ class ExchangesResponse(BaseModel):
 class Option(BaseModel):
     symbol: str
     type: str
-    contractSize: FinamDecimal
-    tradeFirstDay: FinamDate | None = None
-    tradeLastDay: FinamDate
+    contract_size: FinamDecimal
+    trade_first_day: FinamDate | None = None
+    trade_last_day: FinamDate
     strike: FinamDecimal
     multiplier: FinamDecimal | None = None
 
@@ -30,8 +30,8 @@ class OptionsChainResponse(BaseModel):
 
 
 class SessionInterval(BaseModel):
-    startTime: datetime
-    endTime: datetime
+    start_time: datetime
+    end_time: datetime
 
 
 class Session(BaseModel):
@@ -64,26 +64,26 @@ class AssetsResponse(BaseModel):
 class AssetResponse(BaseAssetModel):
     board: str
     decimals: int
-    minStep: str
-    lotSize: FinamDecimal
-    expirationDate: str | None = None
+    min_step: str
+    lot_size: FinamDecimal
+    expiration_date: str | None = None
 
 
 class Status(BaseModel):
     value: str
-    haltedDays: int = 0
+    halted_days: int = 0
 
 
 class AssetParamsResponse(BaseModel):
     symbol: str
-    accountId: str
+    account_id: str
     tradeable: bool
     longable: Status
     shortable: Status
-    longRiskRate: FinamDecimal | None = None
-    longCollateral: FinamMoney | None = None
-    shortRiskRate: FinamDecimal | None = None
-    shortCollateral: FinamMoney | None = None
+    long_risk_rate: FinamDecimal | None = None
+    long_collateral: FinamMoney | None = None
+    short_risk_rate: FinamDecimal | None = None
+    short_collateral: FinamMoney | None = None
 
 
 class ClockResponse(BaseModel):
diff --git a/finam_trade_api/base_client/models.py b/finam_trade_api/base_client/models.py
index 89fbc45..b91320e 100644
--- a/finam_trade_api/base_client/models.py
+++ b/finam_trade_api/base_client/models.py
@@ -22,5 +22,5 @@ class FinamMoney(BaseModel):
     A custom money type for Finam API responses.
     """
     units: str = "0"
-    currencyCode: str = "RUB"
+    currency_code: str = "RUB"
     nanos: int = 0
diff --git a/finam_trade_api/instruments/model.py b/finam_trade_api/instruments/model.py
index f4e18c3..d6b2118 100644
--- a/finam_trade_api/instruments/model.py
+++ b/finam_trade_api/instruments/model.py
@@ -57,11 +57,11 @@ class Quote(BaseModel):
     symbol: str | None = None
     timestamp: datetime
     ask: FinamDecimal
-    askSize: FinamDecimal
+    ask_size: FinamDecimal
     bid: FinamDecimal
-    bidSize: FinamDecimal
+    bid_size: FinamDecimal
     last: FinamDecimal
-    lastSize: FinamDecimal
+    last_size: FinamDecimal
     volume: FinamDecimal
     turnover: FinamDecimal
     open: FinamDecimal
@@ -76,7 +76,7 @@ class QuoteResponse(BaseResponse):
 
 
 class Trade(BaseModel):
-    tradeId: str
+    trade_id: str
     mpid: str = ""
     timestamp: datetime
     price: FinamDecimal
@@ -89,8 +89,8 @@ class TradesResponse(BaseResponse):
 
 class OrderBookRow(BaseModel):
     price: FinamDecimal
-    sellSize: FinamDecimal | None = None
-    buySize: FinamDecimal | None = None
+    sell_size: FinamDecimal | None = None
+    buy_size: FinamDecimal | None = None
     action: OrderBookRowAction
     mpid: str = ""
     timestamp: datetime
diff --git a/pyproject.toml b/pyproject.toml
index 834a6ec..32bc7ad 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "finam-trade-api"
-version = "4.0.3"
+version = "4.1.0"
 description = "Асинхронный REST-клиент для API Finam"
 authors = ["DBoyara <boyarshin.den@yandex.ru>"]
 license = "GNU GPL v.3.0"
diff --git a/tests/access/test_access_token.py b/tests/access/test_access_token.py
index 56b2e80..a690dd8 100644
--- a/tests/access/test_access_token.py
+++ b/tests/access/test_access_token.py
@@ -43,14 +43,14 @@ async def test_returns_token_details_on_successful_request():
     client = TokenClient(token_manager)
 
     token_details = {
-        "createdAt": datetime.now(),
-        "expiresAt": datetime.now(),
-        "accountIds": ["1"],
-        "mdPermissions": [{"quoteLevel": "quoteLevel", "delayMinutes": 0, "mic": "mic"}]
+        "created_at": datetime.now(),
+        "expires_at": datetime.now(),
+        "account_ids": ["1"],
+        "md_permissions": [{"quote_level": "quoteLevel", "delay_minutes": 0, "mic": "mic"}]
     }
     with patch.object(client, "_exec_request", return_value=(token_details, True)):
         result = await client.get_jwt_token_details()
         assert isinstance(result, TokenDetailsResponse)
-        assert result.createdAt
-        assert result.expiresAt
-        assert result.accountIds and "1" in result.accountIds
+        assert result.created_at
+        assert result.expires_at
+        assert result.account_ids and "1" in result.account_ids
diff --git a/tests/account/test_account.py b/tests/account/test_account.py
index 35d28b0..a75ef76 100644
--- a/tests/account/test_account.py
+++ b/tests/account/test_account.py
@@ -26,11 +26,11 @@ async def test_get_account_info_success(account_client):
     account_id = "account123"
     # Создаем данные-заглушку на основе модели GetAccountResponse
     response_data = {
-        "accountId": account_id,
+        "account_id": account_id,
         "type": "broker",
         "status": "active",
         "equity": {"value": "1000.0"},
-        "unrealizedProfit": {"value": "50.0"},
+        "unrealized_profit": {"value": "50.0"},
         "positions": [],
         "cash": []
     }
@@ -41,7 +41,7 @@ async def test_get_account_info_success(account_client):
             f"/accounts/{account_id}",
         )
         assert isinstance(result, GetAccountResponse)
-        assert result.accountId == account_id
+        assert result.account_id == account_id
 
 @pytest.mark.asyncio
 async def test_get_account_info_failure(account_client):
@@ -114,7 +114,7 @@ async def test_get_trades_success(account_client):
     response_data = {
         "trades": [
             {
-                "tradeId": "t1",
+                "trade_id": "t1",
                 "symbol": "AAPL",
                 "price": {"value": "150.0"},
                 "size": {"value": "10.0"},
@@ -136,7 +136,7 @@ async def test_get_trades_success(account_client):
         )
         assert isinstance(result, GetTradesResponse)
         assert len(result.trades) == 1
-        assert result.trades[0].tradeId == "t1"
+        assert result.trades[0].trade_id == "t1"
 
 @pytest.mark.asyncio
 async def test_get_trades_failure(account_client):
diff --git a/tests/assets/test_assets.py b/tests/assets/test_assets.py
index 4198aa8..b60cdba 100644
--- a/tests/assets/test_assets.py
+++ b/tests/assets/test_assets.py
@@ -46,8 +46,8 @@ async def test_get_options_chain_success(assets_client):
         "options": [{
             "symbol": "AAPL2022-12-31C150",
             "type": "call",
-            "contractSize": {"value": "1.0"},
-            "tradeLastDay": {"year":2022, "month": 12, "day": 31},
+            "contract_size": {"value": "1.0"},
+            "trade_last_day": {"year":2022, "month": 12, "day": 31},
             "strike": {"value": "150.0"},
         }]
     }
@@ -76,7 +76,7 @@ async def test_get_schedule_success(assets_client):
         "symbol": symbol,
         "sessions": [{
             "type": "regular",
-            "interval": {"startTime": "2023-01-01T09:30:00", "endTime": "2023-01-01T16:00:00"}
+            "interval": {"start_time": "2023-01-01T09:30:00", "end_time": "2023-01-01T16:00:00"}
         }]
     }
     with patch.object(assets_client, "_exec_request", return_value=(response_data, True)) as mock_exec:
@@ -106,7 +106,7 @@ async def test_get_assets_not_implemented(assets_client):
 async def test_get_asset_success(assets_client):
     symbol = "AAPL"
     account_id = "account123"
-    response_data = {"id": "1", "ticker": "AAPL", "mic": "MIC123", "isin": "US0378331005", "type": "stock", "name": "Apple Inc.", "board": "TQBR", "decimals": 2, "minStep": "0.01", "lotSize": {"value": "10"}}
+    response_data = {"id": "1", "ticker": "AAPL", "mic": "MIC123", "isin": "US0378331005", "type": "stock", "name": "Apple Inc.", "board": "TQBR", "decimals": 2, "min_step": "0.01", "lot_size": {"value": "10"}}
     with patch.object(assets_client, "_exec_request", return_value=(response_data, True)) as mock_exec:
         result = await assets_client.get_asset(symbol, account_id)
         mock_exec.assert_called_once_with(assets_client.RequestMethod.GET, f"/assets/{symbol}", params={"account_id": account_id})
@@ -129,7 +129,7 @@ async def test_get_asset_failure(assets_client):
 async def test_get_asset_params_success(assets_client):
     symbol = "AAPL"
     account_id = "account123"
-    response_data = {"id": "1", "ticker": "AAPL", "mic": "MIC123", "isin": "US0378331005", "type": "stock", "name": "Apple Inc.", "symbol": "AAPL", "accountId": account_id, "tradeable": True, "longable": {"value": "yes", "haltedDays": 0}, "shortable": {"value": "no", "haltedDays": 0}}
+    response_data = {"id": "1", "ticker": "AAPL", "mic": "MIC123", "isin": "US0378331005", "type": "stock", "name": "Apple Inc.", "symbol": "AAPL", "account_id": account_id, "tradeable": True, "longable": {"value": "yes", "halted_days": 0}, "shortable": {"value": "no", "halted_days": 0}}
     with patch.object(assets_client, "_exec_request", return_value=(response_data, True)) as mock_exec:
         result = await assets_client.get_asset_params(symbol, account_id)
         mock_exec.assert_called_once_with(assets_client.RequestMethod.GET, f"/assets/{symbol}/params", params={"account_id": account_id})
diff --git a/tests/instruments/test_instrument.py b/tests/instruments/test_instrument.py
index ea9a568..b6d27c5 100644
--- a/tests/instruments/test_instrument.py
+++ b/tests/instruments/test_instrument.py
@@ -73,19 +73,19 @@ async def test_get_last_quote_success(instrument_client):
         "ask": {
             "value": "4030.5"
         },
-        "askSize": {
+        "ask_size": {
             "value": "90"
         },
         "bid": {
             "value": "4030.0"
         },
-        "bidSize": {
+        "bid_size": {
             "value": "25"
         },
         "last": {
             "value": "4030.5"
         },
-        "lastSize": {
+        "last_size": {
             "value": "39"
         },
         "volume": {