diff --git a/accountant/views/accounts.py b/accountant/views/accounts.py
index 0f17e4b..c3c2a2e 100644
--- a/accountant/views/accounts.py
+++ b/accountant/views/accounts.py
@@ -158,7 +158,7 @@ class AccountListResource(Resource):
     def post(self):
         """Create a new account."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         # A new account MUST NOT have an id;
         if 'id' in data and data['id']:
@@ -219,7 +219,7 @@ class AccountResource(Resource):
     def post(self, id):
         """Update an account."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         # Check ID consistency.
         if 'id' in data and data['id'] and data['id'] != id:
diff --git a/accountant/views/operations.py b/accountant/views/operations.py
index 42ad4b4..52224c7 100644
--- a/accountant/views/operations.py
+++ b/accountant/views/operations.py
@@ -136,7 +136,7 @@ class OperationListResource(Resource):
     def post(self):
         """Create a new operation."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         account_id = data['account_id']
         account = Account.query().get(account_id)
@@ -198,7 +198,7 @@ class OperationResource(Resource):
     def post(self, id):
         """Update an operation."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         # Check ID consistency.
         if 'id' in data and data['id'] and data['id'] != id:
diff --git a/accountant/views/scheduled_operations.py b/accountant/views/scheduled_operations.py
index e104815..3d0f83f 100644
--- a/accountant/views/scheduled_operations.py
+++ b/accountant/views/scheduled_operations.py
@@ -109,7 +109,7 @@ class ScheduledOperationListResource(Resource):
     def post(self):
         """Add a new scheduled operation."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         account_id = data['account_id']
         account = Account.query().get(account_id)
@@ -175,7 +175,7 @@ class ScheduledOperationResource(Resource):
     def post(self, id):
         """Update a scheduled operation."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         # Check ID consistency.
         if 'id' in data and data['id'] and data['id'] != id:
diff --git a/accountant/views/users.py b/accountant/views/users.py
index 3b5ca2d..2ff1c20 100644
--- a/accountant/views/users.py
+++ b/accountant/views/users.py
@@ -128,7 +128,7 @@ class LoginResource(Resource):
     def post(self):
         """Login to retrieve authentication token."""
 
-        data = ns.apis[0].payload
+        data = self.api.payload
 
         user = User.query().filter(
             User.email == data['email']