diff --git a/PiholeAPI.py b/PiholeAPI.py
index 745efab..bcccfb4 100644
--- a/PiholeAPI.py
+++ b/PiholeAPI.py
@@ -72,6 +72,7 @@ class PiholeAPI:
                 # comment: default fallback
                 print()
                 print(response.__dict__)
+                print(response.raw)
                 return False
     # 
     ## Auth based methods
@@ -135,7 +136,7 @@ class PiholeAPI:
         data = self.__query('auth/sessions')
         if data:
             return data['sessions']
-        return False
+        return None
 
     def delete_session(self, session_id: int = None) -> bool:
         """Delete session by ID
@@ -157,6 +158,14 @@ class PiholeAPI:
             logging.info(f'successfull delete session with {session_id=}')
             return True
 
+    def clear_sessions(self):
+        data = self.get_sessions()
+        for session in data:
+            if not session['current_session']:
+                if not self.delete_session(session['id']):
+                    return False
+        return True
+
     def get_app_password(self) -> dict | None:
         """Create new application password
 
@@ -170,10 +179,106 @@ class PiholeAPI:
         data = self.__query('auth/app')
         return data['app']
 
+    #
+    ## metrics based methods
+    #
+    def get_history(self) -> list | None:
+        """Get activity graph data
+
+        Returns:
+            list | None: if successfull: list of history query data
+        """
+        data = self.__query('history')
+        if not data:
+            return None
+        return data['history']
+    
+    def get_history_timerange(self, starttime: int | datetime, endtime: int | datetime) -> list | None:
+        """Get activity graph data (long-term data)
+
+            # TODO: BUG - always response with You need to specify both \\"from\\" and \\"until\\" in the request.
+
+        Args:
+            starttime (int | datetime): start time of data collection (int as timestamp)
+            endtime (int | datetime): end time of data collection (int as timestamp)
+
+        Returns:
+            list | None: if successfull: list of history query data in given time range
+        """
+        payload = dict()
+        if isinstance(starttime, int) and isinstance(endtime, int):
+            payload['from']     = starttime
+            payload['until']    = endtime
+        if isinstance(starttime, datetime) and isinstance(endtime, datetime):
+            payload['from']     = int(starttime.timestamp())
+            payload['until']    = int(endtime.timestamp())
+        
+        if len(payload.keys()) > 0:
+            data = self.__query('history/database', payload=payload)
+            if not data:
+                return None
+            return data
+
+
+    def get_client_history(self) -> list | None:
+        """Get per-client activity graph data
+
+        Returns:
+            list | None: if successfull: list of history query data by client
+        """
+        data = self.__query('history/clients')
+        if not data:
+            return None
+        return data['history']
+
+    def get_client_history_timerange(self, starttime: int | datetime, endtime: int | datetime) -> list | None:
+        """Get activity graph data (long-term data)
+
+            # TODO: BUG - always response with You need to specify both \\"from\\" and \\"until\\" in the request.
+
+        Args:
+            starttime (int | datetime): start time of data collection (int as timestamp)
+            endtime (int | datetime): end time of data collection (int as timestamp)
+
+        Returns:
+            list | None: if successfull: list of history query data by client in given time range
+        """
+        payload = dict()
+        if isinstance(starttime, int) and isinstance(endtime, int):
+            payload['from']     = starttime
+            payload['until']    = endtime
+        if isinstance(starttime, datetime) and isinstance(endtime, datetime):
+            payload['from']     = int(starttime.timestamp())
+            payload['until']    = int(endtime.timestamp())
+        
+        if len(payload.keys()) > 0:
+            data = self.__query('history/database', payload=payload)
+            if not data:
+                return None
+            return data
+
+    def get_queries(self) -> list | None:
+        """Request query details. Query parameters may be used to limit the number of results.
+
+            # TODO: add arguments
+
+        Returns:
+            list | None: By default, this API callback returns the most recent 100 queries. 
+        """
+        data = self.__query('queries')
+        if not data:
+            return None
+        print(data['queries'][0])
+        return data['queries']
+
+    def get_upstrams(self) -> list | None:
+        data = self.__query('stats/upstreams')
+        print(data)
 
 def main():
     pi = PiholeAPI()
-    pi.get_sessions()
+    pi.clear_sessions()
+    pi.get_upstrams()
 
 
 if __name__ == '__main__':