diff --git a/cschwabpy/SchwabAsyncClient.py b/cschwabpy/SchwabAsyncClient.py
index 46aa890..19c89ee 100644
--- a/cschwabpy/SchwabAsyncClient.py
+++ b/cschwabpy/SchwabAsyncClient.py
@@ -6,10 +6,12 @@
     OptionExpiration,
     OptionExpirationChainResponse,
 )
+from cschwabpy.models.trade_models import AccountNumberModel
 from typing import Optional, List, Mapping
 from cschwabpy.costants import (
     SCHWAB_API_BASE_URL,
     SCHWAB_MARKET_DATA_API_BASE_URL,
+    SCHWAB_TRADER_API_BASE_URL,
     SCHWAB_AUTH_PATH,
     SCHWAB_TOKEN_PATH,
 )
@@ -100,6 +102,26 @@ def __auth_header(self) -> Mapping[str, str]:
             "Accept": "application/json",
         }
 
+    async def get_account_numbers_async(self) -> List[AccountNumberModel]:
+        await self._ensure_valid_access_token()
+        import json
+
+        target_url = f"{SCHWAB_TRADER_API_BASE_URL}/accounts/accountNumbers"
+        client = httpx.AsyncClient() if self.__client is None else self.__client
+        try:
+            response = await client.get(
+                url=target_url, params={}, headers=self.__auth_header()
+            )
+            json_res = response.json()
+            print("json_res: ", json_res)
+            account_numbers: List[AccountNumberModel] = []
+            for account_json in json_res:
+                account_numbers.append(AccountNumberModel(**account_json))
+            return account_numbers
+        finally:
+            if not self.__keep_client_alive:
+                await client.aclose()
+
     async def get_option_expirations_async(
         self, underlying_symbol: str
     ) -> List[OptionExpiration]:
diff --git a/cschwabpy/costants.py b/cschwabpy/costants.py
index 6be3d3f..678bc93 100644
--- a/cschwabpy/costants.py
+++ b/cschwabpy/costants.py
@@ -1,4 +1,5 @@
 SCHWAB_API_BASE_URL = "https://api.schwabapi.com/v1"
 SCHWAB_MARKET_DATA_API_BASE_URL = "https://api.schwabapi.com/marketdata/v1"
+SCHWAB_TRADER_API_BASE_URL = "https://api.schwabapi.com/trader/v1"
 SCHWAB_AUTH_PATH = "oauth/authorize"
 SCHWAB_TOKEN_PATH = "oauth/token"
diff --git a/cschwabpy/models/__init__.py b/cschwabpy/models/__init__.py
index 663ef50..392b2b8 100644
--- a/cschwabpy/models/__init__.py
+++ b/cschwabpy/models/__init__.py
@@ -33,6 +33,11 @@ def to_json(self) -> Mapping[str, Any]:
         return self.model_dump(by_alias=True)
 
 
+class ErrorMessage(JSONSerializableBaseModel):
+    message: str
+    errors: List[str]
+
+
 class QueryFilterBase(JSONSerializableBaseModel):
     """Base class for query parameters filters."""
 
diff --git a/cschwabpy/models/trade_models.py b/cschwabpy/models/trade_models.py
new file mode 100644
index 0000000..76cb2b2
--- /dev/null
+++ b/cschwabpy/models/trade_models.py
@@ -0,0 +1,6 @@
+from cschwabpy.models import JSONSerializableBaseModel
+
+
+class AccountNumberModel(JSONSerializableBaseModel):
+    accountNumber: str
+    hashValue: str
diff --git a/tests/data/mock_schwab_api_resp.json b/tests/data/mock_schwab_api_resp.json
index f71cef8..5b9198b 100644
--- a/tests/data/mock_schwab_api_resp.json
+++ b/tests/data/mock_schwab_api_resp.json
@@ -1,5 +1,15 @@
 {
-    "option_expirations_list": {
+   "account_numbers": [
+      {
+         "accountNumber": "123456789",
+         "hashValue": "hash1"
+      },
+      {
+         "accountNumber": "987654321",
+         "hashValue": "hash2"
+      }
+   ],
+   "option_expirations_list": {
       "expirationList": [
         {
           "expirationDate": "2022-01-07",
diff --git a/tests/test_models.py b/tests/test_models.py
index e360798..ed74644 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -121,3 +121,38 @@ async def test_get_option_expirations(httpx_mock: HTTPXMock):
         assert opt_expirations_list[0].daysToExpiration == 2
         assert opt_expirations_list[0].expirationType == "W"
         assert opt_expirations_list[0].standard
+
+
+@pytest.mark.asyncio
+async def test_get_account_numbers(httpx_mock: HTTPXMock):
+    # Mock response for account numbers API
+    mock_data = get_mock_response()
+    mocked_token = mock_tokens()
+    token_store = LocalTokenStore()
+    token_store.save_tokens(mocked_token)
+    if os.path.exists(Path(token_store.token_output_path)):
+        os.remove(token_store.token_output_path)  # clean up before test
+
+    mock_account_numbers_response = mock_data["account_numbers"]
+    # Combine mock response with token JSON
+    httpx_mock.add_response(json=mock_account_numbers_response)
+
+    async with httpx.AsyncClient() as client:
+        cschwab_client = SchwabAsyncClient(
+            app_client_id="fake_id",
+            app_secret="fake_secret",
+            token_store=token_store,
+            tokens=mocked_token,
+            http_client=client,
+        )
+
+        account_numbers = await cschwab_client.get_account_numbers_async()
+        # Assertions to verify the correctness of the API call
+        assert account_numbers is not None
+        assert (
+            len(account_numbers) == 2
+        )  # Expecting 2 account numbers in the mock response
+        assert account_numbers[0].accountNumber == "123456789"
+        assert account_numbers[0].hashValue == "hash1"
+        assert account_numbers[1].accountNumber == "987654321"
+        assert account_numbers[1].hashValue == "hash2"