diff --git a/hamstertools/kimai.py b/hamstertools/kimai.py
index 5d2f84c..0203f06 100644
--- a/hamstertools/kimai.py
+++ b/hamstertools/kimai.py
@@ -2,6 +2,11 @@ import requests
 import requests_cache
 import os
 
+
+class NotFound(Exception):
+    pass
+
+
 class KimaiAPI(object):
     # temporary hardcoded config
     KIMAI_API_URL = 'https://kimai.autonomic.zone/api'
@@ -14,10 +19,16 @@ class KimaiAPI(object):
         'X-AUTH-TOKEN': KIMAI_API_KEY
     }
 
+    def __init__(self):
+        requests_cache.install_cache('kimai', backend='sqlite', expire_after=1800)
+        self.customers_json = requests.get(
+            f'{self.KIMAI_API_URL}/customers?visible=3', headers=self.auth_headers).json()
+        self.projects_json = requests.get(
+            f'{self.KIMAI_API_URL}/projects?visible=3', headers=self.auth_headers).json()
+
 
 class BaseAPI(object):
     def __init__(self, api, **kwargs):
-        requests_cache.install_cache('kimai', backend='sqlite', expire_after=1800)
         for key, value in kwargs.items():
             setattr(self, key, value)
 
@@ -28,12 +39,17 @@ class Customer(BaseAPI):
 
     @staticmethod
     def list(api):
-        response = requests.get(
-            f'{api.KIMAI_API_URL}/customers?visible=3', headers=api.auth_headers).json()
         return [
-            Customer(api, c['id'], c['name']) for c in response
+            Customer(api, c['id'], c['name']) for c in api.customers_json
         ]
 
+    @staticmethod
+    def get_by_id(api, id):
+        for value in api.customers_json:
+            if value['id'] == id:
+                return Customer(api, value['id'], value['name'])
+        raise NotFound()
+
     def __repr__(self):
         return f'Customer (id={self.id}, name={self.name})'
 
@@ -44,16 +60,24 @@ class Project(BaseAPI):
 
     @staticmethod
     def list(api):
-        response = requests.get(
-            f'{api.KIMAI_API_URL}/projects?visible=3', headers=api.auth_headers).json()
         return [
-            Project(api, p['id'], p['name'], p['customer']) for p in response
+            Project(api, p['id'], p['name'], Customer.get_by_id(api, p['customer'])) for p in api.projects_json
         ]
 
+    @staticmethod
+    def get_by_id(api, id):
+        for value in api.projects_json:
+            if value['id'] == id:
+                return Project(api, value['id'], value['name'],
+                               Customer.get_by_id(api, value['customer']))
+        raise NotFound()
+
     def __repr__(self):
         return f'Project (id={self.id}, name={self.name}, customer={self.customer})'
 
 
-customers = Customer.list(KimaiAPI())
-projects = Project.list(KimaiAPI())
+api = KimaiAPI()
+
+customers = Customer.list(api)
+projects = Project.list(api)
 from pdb import set_trace; set_trace()