diff --git a/cdek/api.py b/cdek/api.py
index 666dbe2..d2ac0b1 100644
--- a/cdek/api.py
+++ b/cdek/api.py
@@ -27,10 +27,10 @@ class CDEKClient:
     def request(self, method, url, *args, **kwargs):
         joined_url = urljoin(self.api_url, url)
         request = Request(method, joined_url, *args, **kwargs)
-        prepared = self.session.prepare_request(request)
 
         retries = 0
         while retries < self.MAX_RETRIES:
+            prepared = self.session.prepare_request(request)
             r = self.session.send(prepared)
 
             # TODO: handle/log errors
@@ -51,39 +51,18 @@ class CDEKClient:
             token = data['access_token']
             self.session.headers.update({'Authorization': f'Bearer {token}'})
 
-    # FIXME: not working?
-    def get_order_info(self, cdek_number):
+    def get_order_info(self, im_number):
         params = {
-            'cdek_number': str(cdek_number)
+            'im_number': str(im_number)
         }
         return self.request('GET', self.ORDER_INFO_ENDPOINT, params=params)
 
-    def calculate_tariff(self, order_data):
-        return self.request('POST', self.CALCULATOR_TARIFF_ENDPOINT, json=order_data)
+    def create_order(self, order_data):
+        return self.request('POST', self.ORDER_INFO_ENDPOINT, json=order_data)
+
+    def calculate_tariff(self, data):
+        return self.request('POST', self.CALCULATOR_TARIFF_ENDPOINT, json=data)
 
 
 client = CDEKClient(settings.CDEK_CLIENT_ID, settings.CDEK_CLIENT_SECRET)
 client.authorize()
-
-order_data = {
-    "type": "1",
-    "currency": "1",
-    "lang": "rus",
-    "tariff_code": "137",
-    "from_location": {
-        "address": "Санкт-Петербург, Невский пр. 30"
-    },
-    "to_location": {
-        "address": "Тверь, ул 15 лет октября, дом 50, кВ 2"
-    },
-    "packages": [
-        {
-            "weight": 1200,
-            "length": 35,
-            "width": 26,
-            "height": 14
-        }
-    ]
-}
-r = client.calculate_tariff(order_data)
-print(r)