diff --git a/dbgpt/client/__init__.py b/dbgpt/client/__init__.py
index be187a027..7ddf7e9eb 100644
--- a/dbgpt/client/__init__.py
+++ b/dbgpt/client/__init__.py
@@ -1 +1,5 @@
 """This module is the client of the dbgpt package."""
+
+from .client import Client, ClientException  # noqa: F401
+
+__ALL__ = ["Client", "ClientException"]
diff --git a/dbgpt/client/app.py b/dbgpt/client/app.py
index 594576cb0..f90a9906b 100644
--- a/dbgpt/client/app.py
+++ b/dbgpt/client/app.py
@@ -1,7 +1,7 @@
 """App Client API."""
 from typing import List
 
-from dbgpt.client.client import Client, ClientException
+from dbgpt.client import Client, ClientException
 from dbgpt.client.schemas import AppModel
 from dbgpt.serve.core import Result
 
diff --git a/dbgpt/client/client.py b/dbgpt/client/client.py
index b2c7f40ad..60d46ba9c 100644
--- a/dbgpt/client/client.py
+++ b/dbgpt/client/client.py
@@ -1,5 +1,6 @@
 """This module contains the client for the DB-GPT API."""
 import json
+import os
 from typing import Any, AsyncGenerator, List, Optional, Union
 from urllib.parse import urlparse
 
@@ -50,7 +51,7 @@ class Client:
 
     def __init__(
         self,
-        api_base: str = "http://localhost:5000",
+        api_base: Optional[str] = None,
         api_key: Optional[str] = None,
         version: str = "v2",
         timeout: Optional[httpx._types.TimeoutTypes] = 120,
@@ -59,7 +60,7 @@ class Client:
 
         Args:
             api_base: Optional[str], a full URL for the DB-GPT API.
-                Defaults to the `http://localhost:5000`.
+                Defaults to the `http://localhost:5000/api/v2`.
             api_key: Optional[str], The dbgpt api key to use for authentication.
                 Defaults to None.
             timeout: Optional[httpx._types.TimeoutTypes]: The timeout to use.
@@ -73,20 +74,25 @@ class Client:
         --------
         .. code-block:: python
 
-            from dbgpt.client.client import Client
+            from dbgpt.client import Client
 
-            DBGPT_API_BASE = "http://localhost:5000"
+            DBGPT_API_BASE = "http://localhost:5000/api/v2"
             DBGPT_API_KEY = "dbgpt"
             client = Client(api_base=DBGPT_API_BASE, api_key=DBGPT_API_KEY)
             client.chat(model="chatgpt_proxyllm", messages="Hello?")
         """
+        if not api_base:
+            api_base = os.getenv(
+                "DBGPT_API_BASE", f"http://localhost:5000/{CLIENT_API_PATH}/{version}"
+            )
+        if not api_key:
+            api_key = os.getenv("DBGPT_API_KEY")
         if api_base and is_valid_url(api_base):
-            self._api_url = api_base.rstrip("/")
+            self._api_url = api_base
         else:
             raise ValueError(f"api url {api_base} does not exist or is not accessible.")
         self._api_key = api_key
         self._version = version
-        self._api_url = api_base + CLIENT_API_PATH + "/" + version
         self._timeout = timeout
         headers = {"Authorization": f"Bearer {self._api_key}"} if self._api_key else {}
         self._http_client = httpx.AsyncClient(
@@ -135,9 +141,9 @@ class Client:
         --------
         .. code-block:: python
 
-            from dbgpt.client.client import Client
+            from dbgpt.client import Client
 
-            DBGPT_API_BASE = "http://localhost:5000"
+            DBGPT_API_BASE = "http://localhost:5000/api/v2"
             DBGPT_API_KEY = "dbgpt"
             client = Client(api_base=DBGPT_API_BASE, api_key=DBGPT_API_KEY)
             res = await client.chat(model="chatgpt_proxyllm", messages="Hello?")
@@ -210,9 +216,9 @@ class Client:
         --------
         .. code-block:: python
 
-            from dbgpt.client.client import Client
+            from dbgpt.client import Client
 
-            DBGPT_API_BASE = "http://localhost:5000"
+            DBGPT_API_BASE = "http://localhost:5000/api/v2"
             DBGPT_API_KEY = "dbgpt"
             client = Client(api_base=DBGPT_API_BASE, api_key=DBGPT_API_KEY)
             res = await client.chat_stream(model="chatgpt_proxyllm", messages="Hello?")
@@ -257,7 +263,6 @@ class Client:
                     error = await response.aread()
                     yield json.loads(error)
                 except Exception as e:
-
                     yield f"data:[SERVER_ERROR]{str(e)}\n\n"
 
     async def get(self, path: str, *args):
@@ -274,7 +279,6 @@ class Client:
             )
             return response
         finally:
-
             await self._http_client.aclose()
 
     async def post(self, path: str, args):
diff --git a/dbgpt/client/flow.py b/dbgpt/client/flow.py
index 489b99ae2..eda995da6 100644
--- a/dbgpt/client/flow.py
+++ b/dbgpt/client/flow.py
@@ -1,7 +1,7 @@
 """this module contains the flow client functions."""
 from typing import List
 
-from dbgpt.client.client import Client, ClientException
+from dbgpt.client import Client, ClientException
 from dbgpt.core.awel.flow.flow_factory import FlowPanel
 from dbgpt.serve.core import Result
 
diff --git a/dbgpt/client/knowledge.py b/dbgpt/client/knowledge.py
index 5ed1cdd71..323b51fcb 100644
--- a/dbgpt/client/knowledge.py
+++ b/dbgpt/client/knowledge.py
@@ -2,7 +2,7 @@
 import json
 from typing import List
 
-from dbgpt.client.client import Client, ClientException
+from dbgpt.client import Client, ClientException
 from dbgpt.client.schemas import DocumentModel, SpaceModel, SyncModel
 from dbgpt.serve.core import Result
 
diff --git a/docs/docs/api/app.md b/docs/docs/api/app.md
index 3d7a9953b..013b4e297 100644
--- a/docs/docs/api/app.md
+++ b/docs/docs/api/app.md
@@ -42,7 +42,7 @@ import TabItem from '@theme/TabItem';
 <TabItem value="python">
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 
 DBGPT_API_KEY = "dbgpt"
 APP_ID="{YOUR_APP_ID}"
@@ -94,7 +94,7 @@ curl -X GET "http://localhost:5000/api/v2/serve/apps/$APP_ID" -H "Authorization:
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.app import get_app
 
 DBGPT_API_KEY = "dbgpt"
@@ -146,7 +146,7 @@ curl -X GET 'http://localhost:5000/api/v2/serve/apps' -H "Authorization: Bearer
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.app import list_app
 
 DBGPT_API_KEY = "dbgpt"
diff --git a/docs/docs/api/chat.md b/docs/docs/api/chat.md
index 55284a28e..6cf3d2621 100644
--- a/docs/docs/api/chat.md
+++ b/docs/docs/api/chat.md
@@ -42,7 +42,7 @@ import TabItem from '@theme/TabItem';
 <TabItem value="python">
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 
 DBGPT_API_KEY = "dbgpt"
 
@@ -104,7 +104,7 @@ data: [DONE]
 <TabItem value="python">
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 
 DBGPT_API_KEY = "dbgpt"
 client = Client(api_key=DBGPT_API_KEY)
diff --git a/docs/docs/api/flow.md b/docs/docs/api/flow.md
index ae649839b..7e63e93cf 100644
--- a/docs/docs/api/flow.md
+++ b/docs/docs/api/flow.md
@@ -42,7 +42,7 @@ curl -X POST "http://localhost:5000/api/v2/chat/completions" \
 <TabItem value="python">
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 
 DBGPT_API_KEY = "dbgpt"
 FLOW_ID="{YOUR_FLOW_ID}"
@@ -115,7 +115,7 @@ FLOW_ID={YOUR_FLOW_ID}
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.flow import delete_flow
 
 DBGPT_API_KEY = "dbgpt"
@@ -168,7 +168,7 @@ curl -X GET "http://localhost:5000/api/v2/serve/awel/flows/$FLOW_ID" -H "Authori
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import get_flow
 
 DBGPT_API_KEY = "dbgpt"
@@ -222,7 +222,7 @@ curl -X GET "http://localhost:5000/api/v2/serve/awel/flows" -H "Authorization: B
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.flow import list_flow
 
 DBGPT_API_KEY = "dbgpt"
diff --git a/docs/docs/api/introduction.md b/docs/docs/api/introduction.md
index d195b7c56..6354982ae 100644
--- a/docs/docs/api/introduction.md
+++ b/docs/docs/api/introduction.md
@@ -21,7 +21,7 @@ Example with the DB-GPT API curl command:
 Example with the DB-GPT Client Python package:
     
     ```python
-    from dbgpt.client.client import Client
+    from dbgpt.client import Client
 
     DBGPT_API_KEY = "dbgpt"
     client = Client(api_key=DBGPT_API_KEY)
diff --git a/docs/docs/api/knowledge.md b/docs/docs/api/knowledge.md
index 688add674..b19be1478 100644
--- a/docs/docs/api/knowledge.md
+++ b/docs/docs/api/knowledge.md
@@ -41,7 +41,7 @@ curl -X POST "http://localhost:5000/api/v2/chat/completions" \
 <TabItem value="python">
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 
 DBGPT_API_KEY = "dbgpt"
 SPACE_NAME="{YOUR_SPACE_NAME}"
@@ -345,7 +345,7 @@ POST /api/v2/serve/knowledge/spaces
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import create_space
 from dbgpt.client.schemas import SpaceModel
 
@@ -422,7 +422,7 @@ PUT /api/v2/serve/knowledge/spaces
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import update_space
 from dbgpt.client.schemas import SpaceModel
 
@@ -504,7 +504,7 @@ DELETE /api/v2/serve/knowledge/spaces
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import delete_space
 
 DBGPT_API_KEY = "dbgpt"
@@ -556,7 +556,7 @@ curl -X GET "http://localhost:5000/api/v2/serve/knowledge/spaces/$SPACE_ID" -H "
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import get_space
 
 DBGPT_API_KEY = "dbgpt"
@@ -608,7 +608,7 @@ curl -X GET 'http://localhost:5000/api/v2/serve/knowledge/spaces' -H "Authorizat
 
 
 ```python
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.knowledge import list_space
 
 DBGPT_API_KEY = "dbgpt"
diff --git a/examples/client/__init__.py b/examples/client/__init__.py
deleted file mode 100644
index e69de29bb..000000000
diff --git a/examples/client/app_crud_example.py b/examples/client/app_crud_example.py
index 2f7e9bae5..000607841 100644
--- a/examples/client/app_crud_example.py
+++ b/examples/client/app_crud_example.py
@@ -1,25 +1,20 @@
+"""Client: Simple App CRUD example.
+
+This example demonstrates how to use the dbgpt client to get, list apps.
+Example:
+    .. code-block:: python
+
+        DBGPT_API_KEY = "dbgpt"
+        client = Client(api_key=DBGPT_API_KEY)
+        # 1. List all apps
+        res = await list_app(client)
+        # 2. Get an app
+        res = await get_app(client, app_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8")
+"""
 import asyncio
 
+from dbgpt.client import Client
 from dbgpt.client.app import list_app
-from dbgpt.client.client import Client
-
-"""
-Client: Simple App CRUD example
-        
-            This example demonstrates how to use the dbgpt client to get, list apps.
-            Example:
-            .. code-block:: python
-
-                DBGPT_API_KEY = "dbgpt"
-                client = Client(api_key=DBGPT_API_KEY)
-                # 1. List all apps
-                res = await list_app(client)
-                # 2. Get an app
-                res = await get_app(
-                    client, app_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8"
-                )
-        
-"""
 
 
 async def main():
diff --git a/examples/client/client_chat_example.py b/examples/client/client_chat_example.py
index 5ae7009f8..266ef1bc7 100644
--- a/examples/client/client_chat_example.py
+++ b/examples/client/client_chat_example.py
@@ -1,13 +1,8 @@
-import asyncio
+"""Client: Simple Chat example.
 
-from dbgpt.client.client import Client
+This example demonstrates how to use the dbgpt client to chat with the chatgpt model.
 
-"""
-Client: Simple Chat example
-
-    This example demonstrates how to use the dbgpt client to chat with the chatgpt model.
-    
-    Example:
+Example:
     .. code-block:: python
 
         DBGPT_API_KEY = "dbgpt"
@@ -53,6 +48,10 @@ Client: Simple Chat example
             print(data.dict())
 """
 
+import asyncio
+
+from dbgpt.client import Client
+
 
 async def main():
     # initialize client
diff --git a/examples/client/flow_crud_example.py b/examples/client/flow_crud_example.py
index 29dc95f87..7b83a00a0 100644
--- a/examples/client/flow_crud_example.py
+++ b/examples/client/flow_crud_example.py
@@ -1,38 +1,36 @@
+"""Client: Simple Flow CRUD example
+
+This example demonstrates how to use the dbgpt client to create, get, update, and
+delete flows.
+
+Example:
+    .. code-block:: python
+
+        DBGPT_API_KEY = "dbgpt"
+        client = Client(api_key=DBGPT_API_KEY)
+        # 1. Create a flow
+        res = await create_flow(
+            client,
+            FlowPanel(name="test_flow", desc="for client flow", owner="dbgpt"),
+        )
+        # 2. Update a flow
+        res = await update_flow(
+            client,
+            FlowPanel(name="test_flow", desc="for client flow333", owner="dbgpt"),
+        )
+        # 3. Delete a flow
+        res = await delete_flow(client, flow_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8")
+        # 4. Get a flow
+        res = await get_flow(client, flow_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8")
+        # 5. List all flows
+        res = await list_flow(client)
+
+"""
 import asyncio
 
-from dbgpt.client.client import Client
+from dbgpt.client import Client
 from dbgpt.client.flow import list_flow
 
-"""
-Client: Simple Flow CRUD example
-    
-        This example demonstrates how to use the dbgpt client to create, get, update, and delete flows.
-        Example:
-        .. code-block:: python
-
-            DBGPT_API_KEY = "dbgpt"
-            client = Client(api_key=DBGPT_API_KEY)
-            # 1. Create a flow
-            res = await create_flow(
-                client,
-                FlowPanel(name="test_flow", desc="for client flow", owner="dbgpt"),
-            )
-            # 2. Update a flow
-            res = await update_flow(
-                client,
-                FlowPanel(name="test_flow", desc="for client flow333", owner="dbgpt"),
-            )
-            # 3. Delete a flow
-            res = await delete_flow(
-                client, flow_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8"
-            )
-            # 4. Get a flow
-            res = await get_flow(client, flow_id="bf1c7561-13fc-4fe0-bf5d-c22e724766a8")
-            # 5. List all flows
-            res = await list_flow(client)
-    
-"""
-
 
 async def main():
     # initialize client
diff --git a/examples/client/knowledge_crud_example.py b/examples/client/knowledge_crud_example.py
index b00d01e53..f3533bea2 100644
--- a/examples/client/knowledge_crud_example.py
+++ b/examples/client/knowledge_crud_example.py
@@ -1,13 +1,9 @@
-import asyncio
+"""Client: Simple Knowledge CRUD example.
 
-from dbgpt.client.client import Client
-from dbgpt.client.knowledge import create_space
-from dbgpt.client.schemas import SpaceModel
+This example demonstrates how to use the dbgpt client to create, get, update, and
+delete knowledge spaces and documents.
 
-"""Client: Simple Knowledge CRUD example
-
-    This example demonstrates how to use the dbgpt client to create, get, update, and delete knowledge spaces and documents.
-    Example:
+Example:
     .. code-block:: python
 
         DBGPT_API_KEY = "dbgpt"
@@ -66,6 +62,11 @@ from dbgpt.client.schemas import SpaceModel
         # 10. Delete a document
         res = await delete_document(client, "150")
 """
+import asyncio
+
+from dbgpt.client import Client
+from dbgpt.client.knowledge import create_space
+from dbgpt.client.schemas import SpaceModel
 
 
 async def main():