diff --git a/README.md b/README.md
index 9222aa8..c024f90 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,9 @@ import cognitive_face as CF
 KEY = 'subscription key'  # Replace with a valid Subscription Key here.
 CF.Key.set(KEY)
 
+BASE_URL = 'https://westus.api.cognitive.microsoft.com/face/v1.0/'  # Replace with your regional Base URL
+CF.BaseUrl.set(BASE_URL)
+
 img_url = 'https://raw.githubusercontent.com/Microsoft/Cognitive-Face-Windows/master/Data/detection1.jpg'
 result = CF.face.detect(img_url)
 print result
diff --git a/cognitive_face/__init__.py b/cognitive_face/__init__.py
index cc18328..683a619 100644
--- a/cognitive_face/__init__.py
+++ b/cognitive_face/__init__.py
@@ -12,3 +12,4 @@
 from . import util
 from .util import CognitiveFaceException
 from .util import Key
+from .util import BaseUrl
diff --git a/cognitive_face/tests/__init__.py b/cognitive_face/tests/__init__.py
index 75cb521..44fc995 100644
--- a/cognitive_face/tests/__init__.py
+++ b/cognitive_face/tests/__init__.py
@@ -23,9 +23,11 @@ def setUpModule():
     """Setup for the whole unitests.
 
     - Set Subscription Key.
+    - Set Base URL.
     - Setup needed data for unitests.
     """
     CF.Key.set(config.KEY)
+    CF.BaseUrl.set(config.BASE_URL)
     util.DataStore.setup_person_group()
     util.DataStore.setup_face_list()
     util.DataStore.setup_face()
diff --git a/cognitive_face/tests/config.sample.py b/cognitive_face/tests/config.sample.py
index 8a031fd..93985b4 100644
--- a/cognitive_face/tests/config.sample.py
+++ b/cognitive_face/tests/config.sample.py
@@ -11,6 +11,10 @@
 # Subscription Key for calling the Cognitive Face API.
 KEY = ''
 
+# Base URL for calling the Cognitive Face API.
+# default is 'https://westus.api.cognitive.microsoft.com/face/v1.0/'
+BASE_URL = ''
+
 # Time (in seconds) for sleep between each call to avoid exceeding quota.
 # Default to 3 as free subscription have limit of 20 calls per minute.
 TIME_SLEEP = 3
diff --git a/cognitive_face/util.py b/cognitive_face/util.py
index 4addf28..e758a56 100644
--- a/cognitive_face/util.py
+++ b/cognitive_face/util.py
@@ -11,7 +11,20 @@
 
 import cognitive_face as CF
 
-_BASE_URL = 'https://westus.api.cognitive.microsoft.com/face/v1.0/'
+DEFAULT_BASE_URL = 'https://westus.api.cognitive.microsoft.com/face/v1.0/'
+
+class BaseUrl(object):
+
+    @classmethod
+    def set(cls, base_url):
+        cls.base_url = base_url
+
+    @classmethod
+    def get(cls):
+        if not hasattr(cls, 'base_url'):
+            cls.base_url = DEFAULT_BASE_URL
+        return cls.base_url
+
 TIME_SLEEP = 1
 
 
@@ -58,9 +71,9 @@ def request(method, url, data=None, json=None, headers=None, params=None):
     # pylint: disable=too-many-arguments
     """Universal interface for request."""
 
-    # Make it possible to call only with short name (without _BASE_URL).
+    # Make it possible to call only with short name (without BaseUrl).
     if not url.startswith('https://'):
-        url = _BASE_URL + url
+        url = BaseUrl.get() + url
 
     # Setup the headers with default Content-Type and Subscription Key.
     headers = headers or {}
@@ -87,7 +100,7 @@ def request(method, url, data=None, json=None, headers=None, params=None):
             error_msg.get('code'),
             error_msg.get('message'))
 
-    # Prevent `reponse.json()` complains about empty response.
+    # Prevent `response.json()` complains about empty response.
     if response.text:
         result = response.json()
     else:
@@ -117,7 +130,7 @@ def parse_image(image):
         headers = {'Content-Type': 'application/octet-stream'}
         data = open(image, 'rb').read()
         return headers, data, None
-    else:  # Defailt treat it as a URL (string).
+    else:  # Default treat it as a URL (string).
         headers = {'Content-Type': 'application/json'}
         json = {'url': image}
         return headers, None, json