diff --git a/accountant/api/views/accounts.py b/accountant/api/views/accounts.py
index f6e39b7..f02b370 100644
--- a/accountant/api/views/accounts.py
+++ b/accountant/api/views/accounts.py
@@ -25,27 +25,10 @@ from ..models.operations import Operation
 
 from ..fields import Object
 
-from .users import requires_auth
+from .models import (account_model, solds_model, balance_model,
+                     category_model, ohlc_model)
 from .parsers import account_parser, range_parser
-
-
-account_model = {
-    'id': fields.Integer(default=None),
-    'name': fields.String,
-    'authorized_overdraft': fields.Float,
-}
-
-solds_model = {
-    'current': fields.Float,
-    'pointed': fields.Float,
-    'future': fields.Float,
-}
-
-balance_model = {
-    'expenses': fields.Float,
-    'revenues': fields.Float,
-    'balance': fields.Float,
-}
+from .users import requires_auth
 
 
 class AccountListResource(Resource):
@@ -167,13 +150,6 @@ class BalanceResource(Resource):
         return account.balance(**data), 200
 
 
-category_model = {
-    'category': fields.String,
-    'expenses': fields.Float,
-    'revenues': fields.Float
-}
-
-
 class CategoryResource(Resource):
     @requires_auth
     @marshal_with_field(fields.List(Object(category_model)))
@@ -183,15 +159,6 @@ class CategoryResource(Resource):
         return Operation.get_categories_for_range(id, **data).all()
 
 
-ohlc_model = {
-    'operation_date': fields.DateTime(dt_format='iso8601'),
-    'open': fields.Float,
-    'high': fields.Float,
-    'low': fields.Float,
-    'close': fields.Float
-}
-
-
 class OHLCResource(Resource):
     @requires_auth
     @marshal_with_field(fields.List(Object(ohlc_model)))
diff --git a/accountant/api/views/models.py b/accountant/api/views/models.py
new file mode 100644
index 0000000..ad6f8d1
--- /dev/null
+++ b/accountant/api/views/models.py
@@ -0,0 +1,96 @@
+"""
+    This file is part of Accountant.
+
+    Accountant is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Accountant is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with Accountant.  If not, see <http://www.gnu.org/licenses/>.
+"""
+from flask.ext.restful import fields
+
+# Account model.
+account_model = {
+    'id': fields.Integer(default=None),
+    'name': fields.String,
+    'authorized_overdraft': fields.Float,
+}
+
+# Account status model.
+solds_model = {
+    'current': fields.Float,
+    'pointed': fields.Float,
+    'future': fields.Float,
+}
+
+# Account balance model.
+balance_model = {
+    'expenses': fields.Float,
+    'revenues': fields.Float,
+    'balance': fields.Float,
+}
+
+# Category with expenses and revenues.
+category_model = {
+    'category': fields.String,
+    'expenses': fields.Float,
+    'revenues': fields.Float
+}
+
+# OHLC model.
+ohlc_model = {
+    'operation_date': fields.DateTime(dt_format='iso8601'),
+    'open': fields.Float,
+    'high': fields.Float,
+    'low': fields.Float,
+    'close': fields.Float
+}
+
+# Operation with sold model.
+operation_with_sold_model = {
+    'id': fields.Integer(default=None),
+    'operation_date': fields.DateTime(dt_format='iso8601'),
+    'label': fields.String,
+    'value': fields.Float,
+    'pointed': fields.Boolean,
+    'category': fields.String,
+    'account_id': fields.Integer,
+    'scheduled_operation_id': fields.Integer(default=None),
+    'sold': fields.Float,
+    'confirmed': fields.Boolean,
+    'canceled': fields.Boolean,
+}
+
+# Scheduled operation model.
+scheduled_operation_model = {
+    'id': fields.Integer,
+    'start_date': fields.DateTime(dt_format='iso8601'),
+    'stop_date': fields.DateTime(dt_format='iso8601'),
+    'day': fields.Integer,
+    'frequency': fields.Integer,
+    'label': fields.String,
+    'value': fields.Float,
+    'category': fields.String,
+    'account_id': fields.Integer,
+}
+
+# Token with expiration time and type.
+token_model = {
+    'token': fields.String,
+    'expiration': fields.DateTime(dt_format='iso8601'),
+    'token_type': fields.String
+}
+
+# User model.
+user_model = {
+    'id': fields.Integer(default=None),
+    'email': fields.String,
+    'active': fields.Boolean
+}
diff --git a/accountant/api/views/operations.py b/accountant/api/views/operations.py
index f0ad12f..1438c8f 100644
--- a/accountant/api/views/operations.py
+++ b/accountant/api/views/operations.py
@@ -22,29 +22,13 @@ from .. import api
 
 from ..models.operations import Operation
 
-from .users import requires_auth
+from .models import operation_model, operation_with_sold_model
 from .parsers import operation_parser, account_range_parser
+from .users import requires_auth
 
 from ..fields import Object
 
 
-operation_with_sold_model = {
-    'id': fields.Integer(default=None),
-    'operation_date': fields.DateTime(dt_format='iso8601'),
-    'label': fields.String,
-    'value': fields.Float,
-    'pointed': fields.Boolean,
-    'category': fields.String,
-    'account_id': fields.Integer,
-    'scheduled_operation_id': fields.Integer(default=None),
-    'sold': fields.Float,
-    'confirmed': fields.Boolean,
-    'canceled': fields.Boolean,
-}
-
-operation_model = operation_with_sold_model
-
-
 class OperationListResource(Resource):
     @requires_auth
     @marshal_with_field(fields.List(Object(operation_with_sold_model)))
diff --git a/accountant/api/views/scheduled_operations.py b/accountant/api/views/scheduled_operations.py
index 9aeb0a6..0ddf71b 100644
--- a/accountant/api/views/scheduled_operations.py
+++ b/accountant/api/views/scheduled_operations.py
@@ -25,25 +25,13 @@ from ..models.operations import Operation
 
 from .. import api
 
-from .users import requires_auth
+from .models import scheduled_operation_model
 from .parsers import account_id_parser, scheduled_operation_parser
+from .users import requires_auth
 
 from ..fields import Object
 
 
-scheduled_operation_model = {
-    'id': fields.Integer,
-    'start_date': fields.DateTime(dt_format='iso8601'),
-    'stop_date': fields.DateTime(dt_format='iso8601'),
-    'day': fields.Integer,
-    'frequency': fields.Integer,
-    'label': fields.String,
-    'value': fields.Float,
-    'category': fields.String,
-    'account_id': fields.Integer,
-}
-
-
 class ScheduledOperationListResource(Resource):
     @requires_auth
     @marshal_with_field(fields.List(Object(scheduled_operation_model)))
diff --git a/accountant/api/views/users.py b/accountant/api/views/users.py
index 5d35bd3..77078f6 100644
--- a/accountant/api/views/users.py
+++ b/accountant/api/views/users.py
@@ -20,7 +20,7 @@ import arrow
 from functools import wraps
 
 from flask import request, g
-from flask.ext.restful import Resource, fields, marshal_with, marshal_with_field
+from flask.ext.restful import Resource, marshal_with, marshal_with_field
 
 from accountant import app
 
@@ -30,6 +30,7 @@ from ..fields import Object
 
 from ..models.users import User
 
+from .models import token_model, user_model
 from .parsers import login_parser
 
 
@@ -63,19 +64,6 @@ def requires_auth(f):
     return wrapped
 
 
-token_model = {
-    'token': fields.String,
-    'expiration': fields.DateTime(dt_format='iso8601'),
-    'token_type': fields.String
-}
-
-user_model = {
-    'id': fields.Integer(default=None),
-    'email': fields.String,
-    'active': fields.Boolean
-}
-
-
 class LoginResource(Resource):
     @marshal_with(token_model)
     def post(self):