diff --git a/biblib/client.py b/biblib/client.py
index ad3eb74..ceec6c5 100644
--- a/biblib/client.py
+++ b/biblib/client.py
@@ -1,25 +1,36 @@
-from flask import current_app
+import requests
+from flask import current_app, request
 
+requests.packages.urllib3.disable_warnings()
 
-client = lambda: Client(current_app.config).session
+client = lambda: Client(current_app.config)
 
 
 class Client:
     """
-    The Client class is a thin wrapper around adsmutils ADSFlask client; Use it as a centralized
+    The Client class is a thin wrapper around requests; Use it as a centralized
     place to set application specific parameters, such as the oauth2
     authorization header
     """
     def __init__(self, config):
         """
         Constructor
-
-        :param config: configuration dictionary of the client
+        :param client_config: configuration dictionary of the client
         """
 
-        self.session = current_app.client # Use HTTP pool provided by adsmutils ADSFlask
-        self.token = config.get('BIBLIB_CLIENT_ADSWS_API_TOKEN')
-        if self.token:
-            self.session.headers.update(
-                {'Authorization': 'Bearer {0}'.format(self.token)}
-            )
+        self.session = requests.Session()
+
+    def _sanitize(self, *args, **kwargs):
+        headers = kwargs.get('headers', {})
+        if 'Authorization' not in headers:
+            headers['Authorization'] = current_app.config.get('SERVICE_TOKEN', request.headers.get('X-Forwarded-Authorization', request.headers.get('Authorization', None)))
+        kwargs['headers'] = headers
+
+    def get(self, *args, **kwargs):
+        self._sanitize(*args, **kwargs)
+        return self.session.get(*args, **kwargs)
+    
+    def post(self, *args, **kwargs):
+        self._sanitize(*args, **kwargs)
+        return self.session.post(*args, **kwargs)
+