diff --git a/README.rst b/README.rst
index 865696f..5b7d74a 100644
--- a/README.rst
+++ b/README.rst
@@ -31,9 +31,9 @@ First, we need a client instance:
 
 .. code::
 
-    >>> from httpnet.client import HttpNetClient
+    >>> from httpnet.client import HttpNetClient, PlatformBaseUrl
     >>> AUTH_TOKEN = '<your auth token>'
-    >>> api = HttpNetClient(auth_token=AUTH_TOKEN)
+    >>> api = HttpNetClient(auth_token=AUTH_TOKEN, base_url=PlatformBaseUrl.HTTP_NET)
 
 The client provides access to all service categories in the API. They are iterable:
 
diff --git a/httpnet/_core.py b/httpnet/_core.py
index b8fb2d0..36486f6 100644
--- a/httpnet/_core.py
+++ b/httpnet/_core.py
@@ -13,16 +13,25 @@
 JsonObject = MutableMapping
 
 
+class PlatformBaseUrl(Enum):
+    HTTP_NET = 'https://partner.http.net/api'
+    HOSTING_DE = 'https://secure.hosting.de/api'
+
+    def __str__(self):
+        return self.value
+
+
 class Client:
     USER_AGENT = 'HTTP.NET Partner API Python client 1.0'
-    BASE_URL = 'https://partner.http.net/api'
+    BASE_URL = None
     VERSION = 'v1'
     FORMAT = 'json'
     DEFAULT_TIMEOUT = 180
 
-    def __init__(self, auth_token: str, owner_account_id: Optional[str] = None,
+    def __init__(self, auth_token: str, base_url: PlatformBaseUrl, owner_account_id: Optional[str] = None,
                  timeout: Optional[Union[float, Tuple[float, float]]] = None) -> None:
         self.auth_token = auth_token
+        Client.BASE_URL = base_url
         self.owner_account_id = owner_account_id
         self.timeout = timeout if timeout and timeout > 0 else Client.DEFAULT_TIMEOUT
         self.__session = requests.Session()
diff --git a/httpnet/client.py b/httpnet/client.py
index 53ba977..961fbcd 100644
--- a/httpnet/client.py
+++ b/httpnet/client.py
@@ -1,19 +1,23 @@
 from typing import Optional, Tuple, Union
+from enum import Enum
 
 from ._core import Client
 from .domain import ContactService, DomainService, JobService
 from .dns import ZoneConfigService, RecordService, ZoneService, NameserverSetService, TemplateService
 from .email import MailboxService, OrganizationService, DomainSettingsService
 
+from ._core import PlatformBaseUrl
+
+
 
 class HttpNetClient:
     """
     A client for the http.net Partner API
     """
 
-    def __init__(self, auth_token: str, owner_account_id: Optional[str] = None,
+    def __init__(self, auth_token: str, base_url: PlatformBaseUrl, owner_account_id: Optional[str] = None,
                  timeout: Optional[Union[float, Tuple[float, float]]] = None) -> None:
-        self.__client = Client(auth_token, owner_account_id=owner_account_id, timeout=timeout)
+        self.__client = Client(auth_token, base_url, owner_account_id=owner_account_id, timeout=timeout)
 
         # Domains
         self.domains = DomainService(self.__client)