diff --git a/common/static/js/spec_helpers/ajax_helpers.js b/common/static/js/spec_helpers/ajax_helpers.js
index 6ceda7efcc..e9b97696e4 100644
--- a/common/static/js/spec_helpers/ajax_helpers.js
+++ b/common/static/js/spec_helpers/ajax_helpers.js
@@ -1,6 +1,6 @@
 define(['sinon', 'underscore'], function(sinon, _) {
-    var fakeServer, fakeRequests, expectRequest, expectJsonRequest,
-        respondWithJson, respondWithError, respondWithTextError, responseWithNoContent;
+    var fakeServer, fakeRequests, expectRequest, expectJsonRequest, expectPostRequest,
+        respondWithJson, respondWithError, respondWithTextError, respondWithNoContent;
 
     /* These utility methods are used by Jasmine tests to create a mock server or
      * get reference to mock requests. In either case, the cleanup (restore) is done with
@@ -68,6 +68,20 @@ define(['sinon', 'underscore'], function(sinon, _) {
         expect(JSON.parse(request.requestBody)).toEqual(jsonRequest);
     };
 
+    /**
+     * Intended for use with POST requests using application/x-www-form-urlencoded.
+     */
+    expectPostRequest = function(requests, url, body, requestIndex) {
+        var request;
+        if (_.isUndefined(requestIndex)) {
+            requestIndex = requests.length - 1;
+        }
+        request = requests[requestIndex];
+        expect(request.url).toEqual(url);
+        expect(request.method).toEqual("POST");
+        expect(_.difference(request.requestBody.split('&'), body.split('&'))).toEqual([]);
+    };
+
     respondWithJson = function(requests, jsonResponse, requestIndex) {
         if (_.isUndefined(requestIndex)) {
             requestIndex = requests.length - 1;
@@ -122,6 +136,7 @@ define(['sinon', 'underscore'], function(sinon, _) {
         'requests': fakeRequests,
         'expectRequest': expectRequest,
         'expectJsonRequest': expectJsonRequest,
+        'expectPostRequest': expectPostRequest,
         'respondWithJson': respondWithJson,
         'respondWithError': respondWithError,
         'respondWithTextError': respondWithTextError,
diff --git a/common/test/acceptance/pages/lms/pay_and_verify.py b/common/test/acceptance/pages/lms/pay_and_verify.py
index 319298ea64..0b27a0d69d 100644
--- a/common/test/acceptance/pages/lms/pay_and_verify.py
+++ b/common/test/acceptance/pages/lms/pay_and_verify.py
@@ -76,7 +76,7 @@ class PaymentAndVerificationFlow(PageObject):
 
     def proceed_to_payment(self):
         """Interact with the payment button."""
-        self.q(css="#pay_button").click()
+        self.q(css=".payment-button").click()
 
         FakePaymentPage(self.browser, self._course_id).wait_for_page()
 
diff --git a/lms/djangoapps/commerce/api.py b/lms/djangoapps/commerce/api.py
index 17ac85b2ee..acb19ffaf6 100644
--- a/lms/djangoapps/commerce/api.py
+++ b/lms/djangoapps/commerce/api.py
@@ -60,26 +60,57 @@ class EcommerceAPI(object):
             }
             url = '{base_url}/orders/{order_number}/'.format(base_url=self.url, order_number=order_number)
             return requests.get(url, headers=headers, timeout=self.timeout)
-        return self._call_ecommerce_service(get)
 
-    def create_order(self, user, sku):
+        data = self._call_ecommerce_service(get)
+        return data['number'], data['status'], data
+
+    def get_processors(self, user):
         """
-        Create a new order.
+        Retrieve the list of available payment processors.
 
-        Arguments
-            user    --  User for which the order should be created.
-            sku     --  SKU of the course seat being ordered.
-
-        Returns a tuple with the order number, order status, API response data.
+        Returns a list of strings.
         """
-        def create():
-            """Internal service call to create an order. """
+        def get():
+            """Internal service call to retrieve the processor list. """
             headers = {
                 'Content-Type': 'application/json',
                 'Authorization': 'JWT {}'.format(self._get_jwt(user))
             }
-            url = '{}/orders/'.format(self.url)
-            return requests.post(url, data=json.dumps({'sku': sku}), headers=headers, timeout=self.timeout)
+            url = '{base_url}/payment/processors/'.format(base_url=self.url)
+            return requests.get(url, headers=headers, timeout=self.timeout)
+
+        return self._call_ecommerce_service(get)
+
+    def create_basket(self, user, sku, payment_processor=None):
+        """Create a new basket and immediately trigger checkout.
+
+        Note that while the API supports deferring checkout to a separate step,
+        as well as adding multiple products to the basket, this client does not
+        currently need that capability, so that case is not supported.
+
+        Args:
+            user: the django.auth.User for which the basket should be created.
+            sku: a string containing the SKU of the course seat being ordered.
+            payment_processor: (optional) the name of the payment processor to
+                use for checkout.
+
+        Returns:
+            A dictionary containing {id, order, payment_data}.
+
+        Raises:
+            TimeoutError: the request to the API server timed out.
+            InvalidResponseError: the API server response was not understood.
+        """
+        def create():
+            """Internal service call to create a basket. """
+            headers = {
+                'Content-Type': 'application/json',
+                'Authorization': 'JWT {}'.format(self._get_jwt(user))
+            }
+            url = '{}/baskets/'.format(self.url)
+            data = {'products': [{'sku': sku}], 'checkout': True, 'payment_processor_name': payment_processor}
+            return requests.post(url, data=json.dumps(data), headers=headers, timeout=self.timeout)
+
         return self._call_ecommerce_service(create)
 
     @staticmethod
@@ -92,7 +123,7 @@ class EcommerceAPI(object):
         Arguments
             call    --  A callable function that makes a request to the E-Commerce Service.
 
-        Returns a tuple with the order number, order status, API response data.
+        Returns a dict of JSON-decoded API response data.
         """
         try:
             response = call()
@@ -109,7 +140,7 @@ class EcommerceAPI(object):
         status_code = response.status_code
 
         if status_code == HTTP_200_OK:
-            return data['number'], data['status'], data
+            return data
         else:
             msg = u'Response from E-Commerce API was invalid: (%(status)d) - %(msg)s'
             msg_kwargs = {
diff --git a/lms/djangoapps/commerce/constants.py b/lms/djangoapps/commerce/constants.py
index b8266d8d47..729830a2e8 100644
--- a/lms/djangoapps/commerce/constants.py
+++ b/lms/djangoapps/commerce/constants.py
@@ -4,13 +4,8 @@
 class OrderStatus(object):
     """Constants representing all known order statuses. """
     OPEN = 'Open'
-    ORDER_CANCELLED = 'Order Cancelled'
-    BEING_PROCESSED = 'Being Processed'
-    PAYMENT_CANCELLED = 'Payment Cancelled'
-    PAID = 'Paid'
     FULFILLMENT_ERROR = 'Fulfillment Error'
     COMPLETE = 'Complete'
-    REFUNDED = 'Refunded'
 
 
 class Messages(object):
diff --git a/lms/djangoapps/commerce/tests/__init__.py b/lms/djangoapps/commerce/tests/__init__.py
index 75eede3957..580b0f5170 100644
--- a/lms/djangoapps/commerce/tests/__init__.py
+++ b/lms/djangoapps/commerce/tests/__init__.py
@@ -6,7 +6,6 @@ import jwt
 import mock
 
 from commerce.api import EcommerceAPI
-from commerce.constants import OrderStatus
 
 
 class EcommerceApiTestMixin(object):
@@ -14,12 +13,19 @@ class EcommerceApiTestMixin(object):
 
     ECOMMERCE_API_URL = 'http://example.com/api'
     ECOMMERCE_API_SIGNING_KEY = 'edx'
+    BASKET_ID = 7
     ORDER_NUMBER = '100004'
+    PROCESSOR = 'test-processor'
+    PAYMENT_DATA = {
+        'payment_processor_name': PROCESSOR,
+        'payment_form_data': {},
+        'payment_page_url': 'http://example.com/pay',
+    }
+    ORDER_DATA = {'number': ORDER_NUMBER}
     ECOMMERCE_API_SUCCESSFUL_BODY = {
-        'status': OrderStatus.COMPLETE,
-        'number': ORDER_NUMBER,
-        'payment_processor': 'cybersource',
-        'payment_parameters': {'orderNumber': ORDER_NUMBER}
+        'id': BASKET_ID,
+        'order': {'number': ORDER_NUMBER},   # never both None.
+        'payment_data': PAYMENT_DATA,
     }
     ECOMMERCE_API_SUCCESSFUL_BODY_JSON = json.dumps(ECOMMERCE_API_SUCCESSFUL_BODY)  # pylint: disable=invalid-name
 
@@ -28,14 +34,18 @@ class EcommerceApiTestMixin(object):
         expected_jwt = jwt.encode({'username': user.username, 'email': user.email}, key)
         self.assertEqual(request.headers['Authorization'], 'JWT {}'.format(expected_jwt))
 
-    def assertValidOrderRequest(self, request, user, jwt_signing_key, sku):
+    def assertValidBasketRequest(self, request, user, jwt_signing_key, sku, processor):
         """ Verifies that an order request to the E-Commerce Service is valid. """
         self.assertValidJWTAuthHeader(request, user, jwt_signing_key)
-
-        self.assertEqual(request.body, '{{"sku": "{}"}}'.format(sku))
+        expected_body_data = {
+            'products': [{'sku': sku}],
+            'checkout': True,
+            'payment_processor_name': processor
+        }
+        self.assertEqual(json.loads(request.body), expected_body_data)
         self.assertEqual(request.headers['Content-Type'], 'application/json')
 
-    def _mock_ecommerce_api(self, status=200, body=None):
+    def _mock_ecommerce_api(self, status=200, body=None, is_payment_required=False):
         """
         Mock calls to the E-Commerce API.
 
@@ -43,27 +53,25 @@ class EcommerceApiTestMixin(object):
         """
         self.assertTrue(httpretty.is_enabled(), 'Test is missing @httpretty.activate decorator.')
 
-        url = self.ECOMMERCE_API_URL + '/orders/'
-        body = body or self.ECOMMERCE_API_SUCCESSFUL_BODY_JSON
+        url = self.ECOMMERCE_API_URL + '/baskets/'
+        if body is None:
+            response_data = {'id': self.BASKET_ID, 'payment_data': None, 'order': None}
+            if is_payment_required:
+                response_data['payment_data'] = self.PAYMENT_DATA
+            else:
+                response_data['order'] = {'number': self.ORDER_NUMBER}
+            body = json.dumps(response_data)
         httpretty.register_uri(httpretty.POST, url, status=status, body=body)
 
-    class mock_create_order(object):    # pylint: disable=invalid-name
-        """ Mocks calls to EcommerceAPI.create_order. """
+    class mock_create_basket(object):    # pylint: disable=invalid-name
+        """ Mocks calls to EcommerceAPI.create_basket. """
 
         patch = None
 
         def __init__(self, **kwargs):
-            default_kwargs = {
-                'return_value': (
-                    EcommerceApiTestMixin.ORDER_NUMBER,
-                    OrderStatus.COMPLETE,
-                    EcommerceApiTestMixin.ECOMMERCE_API_SUCCESSFUL_BODY
-                )
-            }
-
+            default_kwargs = {'return_value': EcommerceApiTestMixin.ECOMMERCE_API_SUCCESSFUL_BODY}
             default_kwargs.update(kwargs)
-
-            self.patch = mock.patch.object(EcommerceAPI, 'create_order', mock.Mock(**default_kwargs))
+            self.patch = mock.patch.object(EcommerceAPI, 'create_basket', mock.Mock(**default_kwargs))
 
         def __enter__(self):
             self.patch.start()
diff --git a/lms/djangoapps/commerce/tests/test_api.py b/lms/djangoapps/commerce/tests/test_api.py
index 43a01a0746..5caf643cf4 100644
--- a/lms/djangoapps/commerce/tests/test_api.py
+++ b/lms/djangoapps/commerce/tests/test_api.py
@@ -10,7 +10,6 @@ import httpretty
 from requests import Timeout
 
 from commerce.api import EcommerceAPI
-from commerce.constants import OrderStatus
 from commerce.exceptions import InvalidResponseError, TimeoutError, InvalidConfigurationError
 from commerce.tests import EcommerceApiTestMixin
 from student.tests.factories import UserFactory
@@ -26,7 +25,7 @@ class EcommerceAPITests(EcommerceApiTestMixin, TestCase):
 
     def setUp(self):
         super(EcommerceAPITests, self).setUp()
-        self.url = reverse('commerce:orders')
+        self.url = reverse('commerce:baskets')
         self.user = UserFactory()
         self.api = EcommerceAPI()
 
@@ -48,35 +47,40 @@ class EcommerceAPITests(EcommerceApiTestMixin, TestCase):
         self.assertRaises(InvalidConfigurationError, EcommerceAPI)
 
     @httpretty.activate
-    def test_create_order(self):
+    @data(True, False)
+    def test_create_basket(self, is_payment_required):
         """ Verify the method makes a call to the E-Commerce API with the correct headers and data. """
-        self._mock_ecommerce_api()
-        number, status, body = self.api.create_order(self.user, self.SKU)
+        self._mock_ecommerce_api(is_payment_required=is_payment_required)
+        response_data = self.api.create_basket(self.user, self.SKU, self.PROCESSOR)
 
         # Validate the request sent to the E-Commerce API endpoint.
         request = httpretty.last_request()
-        self.assertValidOrderRequest(request, self.user, self.ECOMMERCE_API_SIGNING_KEY, self.SKU)
+        self.assertValidBasketRequest(request, self.user, self.ECOMMERCE_API_SIGNING_KEY, self.SKU, self.PROCESSOR)
 
         # Validate the data returned by the method
-        self.assertEqual(number, self.ORDER_NUMBER)
-        self.assertEqual(status, OrderStatus.COMPLETE)
-        self.assertEqual(body, self.ECOMMERCE_API_SUCCESSFUL_BODY)
+        self.assertEqual(response_data['id'], self.BASKET_ID)
+        if is_payment_required:
+            self.assertEqual(response_data['order'], None)
+            self.assertEqual(response_data['payment_data'], self.PAYMENT_DATA)
+        else:
+            self.assertEqual(response_data['order'], {"number": self.ORDER_NUMBER})
+            self.assertEqual(response_data['payment_data'], None)
 
     @httpretty.activate
     @data(400, 401, 405, 406, 429, 500, 503)
-    def test_create_order_with_invalid_http_status(self, status):
+    def test_create_basket_with_invalid_http_status(self, status):
         """ If the E-Commerce API returns a non-200 status, the method should raise an InvalidResponseError. """
         self._mock_ecommerce_api(status=status, body=json.dumps({'user_message': 'FAIL!'}))
-        self.assertRaises(InvalidResponseError, self.api.create_order, self.user, self.SKU)
+        self.assertRaises(InvalidResponseError, self.api.create_basket, self.user, self.SKU, self.PROCESSOR)
 
     @httpretty.activate
-    def test_create_order_with_invalid_json(self):
+    def test_create_basket_with_invalid_json(self):
         """ If the E-Commerce API returns un-parseable data, the method should raise an InvalidResponseError. """
         self._mock_ecommerce_api(body='TOTALLY NOT JSON!')
-        self.assertRaises(InvalidResponseError, self.api.create_order, self.user, self.SKU)
+        self.assertRaises(InvalidResponseError, self.api.create_basket, self.user, self.SKU, self.PROCESSOR)
 
     @httpretty.activate
-    def test_create_order_with_timeout(self):
+    def test_create_basket_with_timeout(self):
         """ If the call to the E-Commerce API times out, the method should raise a TimeoutError. """
 
         def request_callback(_request, _uri, _headers):
@@ -85,4 +89,4 @@ class EcommerceAPITests(EcommerceApiTestMixin, TestCase):
 
         self._mock_ecommerce_api(body=request_callback)
 
-        self.assertRaises(TimeoutError, self.api.create_order, self.user, self.SKU)
+        self.assertRaises(TimeoutError, self.api.create_basket, self.user, self.SKU, self.PROCESSOR)
diff --git a/lms/djangoapps/commerce/tests/test_views.py b/lms/djangoapps/commerce/tests/test_views.py
index f73110174b..3e637fe30e 100644
--- a/lms/djangoapps/commerce/tests/test_views.py
+++ b/lms/djangoapps/commerce/tests/test_views.py
@@ -9,7 +9,7 @@ from django.test.utils import override_settings
 from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory
 
-from commerce.constants import OrderStatus, Messages
+from commerce.constants import Messages
 from commerce.exceptions import TimeoutError, ApiError
 from commerce.tests import EcommerceApiTestMixin
 from course_modes.models import CourseMode
@@ -22,7 +22,7 @@ from student.tests.tests import EnrollmentEventTestMixin
 @ddt
 @override_settings(ECOMMERCE_API_URL=EcommerceApiTestMixin.ECOMMERCE_API_URL,
                    ECOMMERCE_API_SIGNING_KEY=EcommerceApiTestMixin.ECOMMERCE_API_SIGNING_KEY)
-class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleStoreTestCase):
+class BasketsViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleStoreTestCase):
     """
     Tests for the commerce orders view.
     """
@@ -48,6 +48,11 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         actual = json.loads(response.content)['detail']
         self.assertEqual(actual, expected_msg)
 
+    def assertResponsePaymentData(self, response):
+        """ Asserts correctness of a JSON body containing payment information. """
+        actual_response = json.loads(response.content)
+        self.assertEqual(actual_response, self.PAYMENT_DATA)
+
     def assertValidEcommerceInternalRequestErrorResponse(self, response):
         """ Asserts the response is a valid response sent when the E-Commerce API is unavailable. """
         self.assertEqual(response.status_code, 500)
@@ -60,8 +65,8 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         self.assert_no_events_were_emitted()
 
     def setUp(self):
-        super(OrdersViewTests, self).setUp()
-        self.url = reverse('commerce:orders')
+        super(BasketsViewTests, self).setUp()
+        self.url = reverse('commerce:baskets')
         self.user = UserFactory()
         self._login()
 
@@ -113,7 +118,7 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         """
         If the call to the E-Commerce API times out, the view should log an error and return an HTTP 503 status.
         """
-        with self.mock_create_order(side_effect=TimeoutError):
+        with self.mock_create_basket(side_effect=TimeoutError):
             response = self._post_to_view()
 
         self.assertValidEcommerceInternalRequestErrorResponse(response)
@@ -123,22 +128,24 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         """
         If the E-Commerce API raises an error, the view should return an HTTP 503 status.
         """
-        with self.mock_create_order(side_effect=ApiError):
+        with self.mock_create_basket(side_effect=ApiError):
             response = self._post_to_view()
 
         self.assertValidEcommerceInternalRequestErrorResponse(response)
         self.assertUserNotEnrolled()
 
-    def _test_successful_ecommerce_api_call(self):
+    def _test_successful_ecommerce_api_call(self, is_completed=True):
         """
         Verifies that the view contacts the E-Commerce API with the correct data and headers.
         """
-        with self.mock_create_order():
-            response = self._post_to_view()
+        response = self._post_to_view()
 
         # Validate the response content
-        msg = Messages.ORDER_COMPLETED.format(order_number=self.ORDER_NUMBER)
-        self.assertResponseMessage(response, msg)
+        if is_completed:
+            msg = Messages.ORDER_COMPLETED.format(order_number=self.ORDER_NUMBER)
+            self.assertResponseMessage(response, msg)
+        else:
+            self.assertResponsePaymentData(response)
 
     @data(True, False)
     def test_course_with_honor_seat_sku(self, user_is_active):
@@ -151,26 +158,30 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         self.user.is_active = user_is_active
         self.user.save()  # pylint: disable=no-member
 
-        self._test_successful_ecommerce_api_call()
+        return_value = {'id': self.BASKET_ID, 'payment_data': None, 'order': {'number': self.ORDER_NUMBER}}
+        with self.mock_create_basket(return_value=return_value):
+            self._test_successful_ecommerce_api_call()
 
-    def test_order_not_complete(self):
-        with self.mock_create_order(return_value=(self.ORDER_NUMBER,
-                                                  OrderStatus.OPEN,
-                                                  self.ECOMMERCE_API_SUCCESSFUL_BODY)):
-            response = self._post_to_view()
-        self.assertEqual(response.status_code, 202)
-        msg = Messages.ORDER_INCOMPLETE_ENROLLED.format(order_number=self.ORDER_NUMBER)
-        self.assertResponseMessage(response, msg)
+    @data(True, False)
+    def test_course_with_paid_seat_sku(self, user_is_active):
+        """
+        If the course has a SKU, the view should return data that the client
+        will use to redirect the user to an external payment processor.
+        """
+        # Set user's active flag
+        self.user.is_active = user_is_active
+        self.user.save()  # pylint: disable=no-member
 
-        # TODO Eventually we should NOT be enrolling users directly from this view.
-        self.assertTrue(CourseEnrollment.is_enrolled(self.user, self.course.id))
+        return_value = {'id': self.BASKET_ID, 'payment_data': self.PAYMENT_DATA, 'order': None}
+        with self.mock_create_basket(return_value=return_value):
+            self._test_successful_ecommerce_api_call(False)
 
     def _test_course_without_sku(self):
         """
         Validates the view bypasses the E-Commerce API when the course has no CourseModes with SKUs.
         """
         # Place an order
-        with self.mock_create_order() as api_mock:
+        with self.mock_create_basket() as api_mock:
             response = self._post_to_view()
 
         # Validate the response content
@@ -199,7 +210,7 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         """
         If the E-Commerce Service is not configured, the view should enroll the user.
         """
-        with self.mock_create_order() as api_mock:
+        with self.mock_create_basket() as api_mock:
             response = self._post_to_view()
 
         # Validate the response
@@ -219,7 +230,7 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         CourseModeFactory.create(course_id=self.course.id, mode_slug=mode, mode_display_name=mode,
                                  sku=uuid4().hex.decode('ascii'))
 
-        with self.mock_create_order() as api_mock:
+        with self.mock_create_basket() as api_mock:
             response = self._post_to_view()
 
         # The view should return an error status code
@@ -274,4 +285,17 @@ class OrdersViewTests(EnrollmentEventTestMixin, EcommerceApiTestMixin, ModuleSto
         self.assertFalse(CourseEnrollment.is_enrolled(self.user, self.course.id))
         self.assertIsNotNone(get_enrollment(self.user.username, unicode(self.course.id)))
 
-        self._test_successful_ecommerce_api_call()
+        with self.mock_create_basket():
+            self._test_successful_ecommerce_api_call(False)
+
+
+class OrdersViewTests(BasketsViewTests):
+    """
+    Ensures that /orders/ points to and behaves like /baskets/, for backward
+    compatibility with stale js clients during updates.
+
+    (XCOM-214) remove after release.
+    """
+    def setUp(self):
+        super(OrdersViewTests, self).setUp()
+        self.url = reverse('commerce:orders')
diff --git a/lms/djangoapps/commerce/urls.py b/lms/djangoapps/commerce/urls.py
index 711a69d44d..390b3dc67d 100644
--- a/lms/djangoapps/commerce/urls.py
+++ b/lms/djangoapps/commerce/urls.py
@@ -4,10 +4,12 @@ Defines the URL routes for this app.
 
 from django.conf.urls import patterns, url
 
-from .views import OrdersView, checkout_cancel
+from .views import BasketsView, checkout_cancel
 
 urlpatterns = patterns(
     '',
-    url(r'^orders/$', OrdersView.as_view(), name="orders"),
+    url(r'^baskets/$', BasketsView.as_view(), name="baskets"),
     url(r'^checkout/cancel/$', checkout_cancel, name="checkout_cancel"),
+    # (XCOM-214) For backwards compatibility with js clients during intial release
+    url(r'^orders/$', BasketsView.as_view(), name="orders"),
 )
diff --git a/lms/djangoapps/commerce/views.py b/lms/djangoapps/commerce/views.py
index c80daf7229..8de4fbff8d 100644
--- a/lms/djangoapps/commerce/views.py
+++ b/lms/djangoapps/commerce/views.py
@@ -3,31 +3,31 @@ import logging
 
 from django.conf import settings
 from django.views.decorators.cache import cache_page
-
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
 from rest_framework.permissions import IsAuthenticated
-from rest_framework.status import HTTP_406_NOT_ACCEPTABLE, HTTP_202_ACCEPTED, HTTP_409_CONFLICT
+from rest_framework.status import HTTP_406_NOT_ACCEPTABLE, HTTP_409_CONFLICT
 from rest_framework.views import APIView
 
 from commerce.api import EcommerceAPI
-from commerce.constants import OrderStatus, Messages
-from commerce.exceptions import ApiError, InvalidConfigurationError
+from commerce.constants import Messages
+from commerce.exceptions import ApiError, InvalidConfigurationError, InvalidResponseError
 from commerce.http import DetailResponse, InternalRequestErrorResponse
 from course_modes.models import CourseMode
 from courseware import courses
 from edxmako.shortcuts import render_to_response
 from enrollment.api import add_enrollment
 from microsite_configuration import microsite
-from student.models import CourseEnrollment
 from openedx.core.lib.api.authentication import SessionAuthenticationAllowInactiveUser
+from student.models import CourseEnrollment
+from util.json_request import JsonResponse
 
 
 log = logging.getLogger(__name__)
 
 
-class OrdersView(APIView):
-    """ Creates an order with a course seat and enrolls users. """
+class BasketsView(APIView):
+    """ Creates a basket with a course seat and enrolls users. """
 
     # LMS utilizes User.user_is_active to indicate email verification, not whether an account is active. Sigh!
     authentication_classes = (SessionAuthenticationAllowInactiveUser,)
@@ -63,7 +63,7 @@ class OrdersView(APIView):
 
     def post(self, request, *args, **kwargs):  # pylint: disable=unused-argument
         """
-        Attempt to create the order and enroll the user.
+        Attempt to create the basket and enroll the user.
         """
         user = request.user
         valid, course_key, error = self._is_data_valid(request)
@@ -103,28 +103,31 @@ class OrdersView(APIView):
 
         # Make the API call
         try:
-            order_number, order_status, _body = api.create_order(user, honor_mode.sku)
-            if order_status == OrderStatus.COMPLETE:
-                msg = Messages.ORDER_COMPLETED.format(order_number=order_number)
+            response_data = api.create_basket(
+                user,
+                honor_mode.sku,
+                payment_processor="cybersource",
+            )
+            payment_data = response_data["payment_data"]
+            if payment_data is not None:
+                # it is time to start the payment flow.
+                # NOTE this branch does not appear to be used at the moment.
+                return JsonResponse(payment_data)
+            elif response_data['order']:
+                # the order was completed immediately because there was no charge.
+                msg = Messages.ORDER_COMPLETED.format(order_number=response_data['order']['number'])
                 log.debug(msg)
                 return DetailResponse(msg)
             else:
-                # TODO Before this functionality is fully rolled-out, this branch should be updated to NOT enroll the
-                # user. Enrollments must be initiated by the E-Commerce API only.
+                # Enroll in the honor mode directly as a failsafe.
+                # This MUST be removed when this code handles paid modes.
                 self._enroll(course_key, user)
-                msg = u'Order %(order_number)s was received with %(status)s status. Expected %(complete_status)s. ' \
-                      u'User %(username)s was enrolled in %(course_id)s by LMS.'
-                msg_kwargs = {
-                    'order_number': order_number,
-                    'status': order_status,
-                    'complete_status': OrderStatus.COMPLETE,
-                    'username': user.username,
-                    'course_id': course_id,
-                }
-                log.error(msg, msg_kwargs)
-
-                msg = Messages.ORDER_INCOMPLETE_ENROLLED.format(order_number=order_number)
-                return DetailResponse(msg, status=HTTP_202_ACCEPTED)
+                msg = u'Unexpected response from basket endpoint.'
+                log.error(
+                    msg + u' Could not enroll user %(username)s in course %(course_id)s.',
+                    {'username': user.id, 'course_id': course_id},
+                )
+                raise InvalidResponseError(msg)
         except ApiError as err:
             # The API will handle logging of the error.
             return InternalRequestErrorResponse(err.message)
diff --git a/lms/djangoapps/shoppingcart/tests/test_views.py b/lms/djangoapps/shoppingcart/tests/test_views.py
index 9976ff8f10..dc254cd620 100644
--- a/lms/djangoapps/shoppingcart/tests/test_views.py
+++ b/lms/djangoapps/shoppingcart/tests/test_views.py
@@ -918,24 +918,27 @@ class ShoppingCartViewsTests(ModuleStoreTestCase):
         """Mocks calls to EcommerceAPI.get_order. """
         patch = None
 
-        ORDER = copy.deepcopy(EcommerceApiTestMixin.ECOMMERCE_API_SUCCESSFUL_BODY)
-        ORDER['total_excl_tax'] = 40.0
-        ORDER['currency'] = 'USD'
-        ORDER['sources'] = [{'transactions': [
-            {'date_created': '2015-04-07 17:59:06.274587+00:00'},
-            {'date_created': '2015-04-08 13:33:06.150000+00:00'},
-            {'date_created': '2015-04-09 10:45:06.200000+00:00'},
-        ]}]
-        ORDER['billing_address'] = {
-            'first_name': 'Philip',
-            'last_name': 'Fry',
-            'line1': 'Robot Arms Apts',
-            'line2': '22 Robot Street',
-            'line4': 'New New York',
-            'state': 'NY',
-            'postcode': '11201',
-            'country': {
-                'display_name': 'United States',
+        ORDER = {
+            'status': OrderStatus.COMPLETE,
+            'number': EcommerceApiTestMixin.ORDER_NUMBER,
+            'total_excl_tax': 40.0,
+            'currency': 'USD',
+            'sources': [{'transactions': [
+                {'date_created': '2015-04-07 17:59:06.274587+00:00'},
+                {'date_created': '2015-04-08 13:33:06.150000+00:00'},
+                {'date_created': '2015-04-09 10:45:06.200000+00:00'},
+            ]}],
+            'billing_address': {
+                'first_name': 'Philip',
+                'last_name': 'Fry',
+                'line1': 'Robot Arms Apts',
+                'line2': '22 Robot Street',
+                'line4': 'New New York',
+                'state': 'NY',
+                'postcode': '11201',
+                'country': {
+                    'display_name': 'United States',
+                },
             },
         }
 
diff --git a/lms/djangoapps/verify_student/tests/test_integration.py b/lms/djangoapps/verify_student/tests/test_integration.py
index 9a50df7c78..e792425080 100644
--- a/lms/djangoapps/verify_student/tests/test_integration.py
+++ b/lms/djangoapps/verify_student/tests/test_integration.py
@@ -58,4 +58,4 @@ class TestProfEdVerification(ModuleStoreTestCase):
 
         # On the first page of the flow, verify that there's a button allowing the user
         # to proceed to the payment processor; this is the only action the user is allowed to take.
-        self.assertContains(resp, 'pay_button')
+        self.assertContains(resp, 'payment-button')
diff --git a/lms/djangoapps/verify_student/tests/test_views.py b/lms/djangoapps/verify_student/tests/test_views.py
index 3cb81a82e7..ea1e3ce4b5 100644
--- a/lms/djangoapps/verify_student/tests/test_views.py
+++ b/lms/djangoapps/verify_student/tests/test_views.py
@@ -52,6 +52,8 @@ def mock_render_to_response(*args, **kwargs):
 
 render_mock = Mock(side_effect=mock_render_to_response)
 
+PAYMENT_DATA_KEYS = {'payment_processor_name', 'payment_page_url', 'payment_form_data'}
+
 
 class StartView(TestCase):
     def start_url(self, course_id=""):
@@ -849,166 +851,159 @@ class TestPayAndVerifyView(UrlResetMixin, ModuleStoreTestCase):
         self.assertEqual(response_dict['course_name'], mode_display_name)
 
 
-class TestCreateOrder(EcommerceApiTestMixin, ModuleStoreTestCase):
+class CheckoutTestMixin(object):
     """
-    Tests for the create order view.
+    Mixin implementing test methods that should behave identically regardless
+    of which backend is used (shoppingcart or ecommerce service).  Subclasses
+    immediately follow for each backend, which inherit from TestCase and
+    define methods needed to customize test parameters, and patch the
+    appropriate checkout method.
+
+    Though the view endpoint under test is named 'create_order' for backward-
+    compatibility, the effect of using this endpoint is to choose a specific product
+    (i.e. course mode) and trigger immediate checkout.
     """
     def setUp(self):
         """ Create a user and course. """
-        super(TestCreateOrder, self).setUp()
+        super(CheckoutTestMixin, self).setUp()
 
         self.user = UserFactory.create(username="test", password="test")
         self.course = CourseFactory.create()
         for mode, min_price in (('audit', 0), ('honor', 0), ('verified', 100)):
-            # Set SKU to empty string to ensure view knows how to handle such values
-            CourseModeFactory(mode_slug=mode, course_id=self.course.id, min_price=min_price, sku='')
+            CourseModeFactory(mode_slug=mode, course_id=self.course.id, min_price=min_price, sku=self.make_sku())
         self.client.login(username="test", password="test")
 
-    def _post(self, data):
+    def _assert_checked_out(
+            self,
+            post_params,
+            patched_create_order,
+            expected_course_key,
+            expected_mode_slug,
+            expected_status_code=200
+    ):
         """
-        POST to the view being tested and return the response.
+        DRY helper.
+
+        Ensures that checkout functions were invoked as
+        expected during execution of the create_order endpoint.
         """
-        url = reverse('verify_student_create_order')
-        return self.client.post(url, data)
-
-    def test_create_order_already_verified(self):
-        # Verify the student so we don't need to submit photos
-        self._verify_student()
+        post_params.setdefault('processor', None)
+        response = self.client.post(reverse('verify_student_create_order'), post_params)
+        self.assertEqual(response.status_code, expected_status_code)
+        if expected_status_code == 200:
+            # ensure we called checkout at all
+            self.assertTrue(patched_create_order.called)
+            # ensure checkout args were correct
+            args = self._get_checkout_args(patched_create_order)
+            self.assertEqual(args['user'], self.user)
+            self.assertEqual(args['course_key'], expected_course_key)
+            self.assertEqual(args['course_mode'].slug, expected_mode_slug)
+            # ensure response data was correct
+            data = json.loads(response.content)
+            self.assertEqual(set(data.keys()), PAYMENT_DATA_KEYS)
+        else:
+            self.assertFalse(patched_create_order.called)
 
+    def test_create_order(self, patched_create_order):
         # Create an order
         params = {
             'course_id': unicode(self.course.id),
-            'contribution': 100
+            'contribution': 100,
         }
-        response = self._post(params)
-        self.assertEqual(response.status_code, 200)
-
-        # Verify that the information will be sent to the correct callback URL
-        # (configured by test settings)
-        data = json.loads(response.content)
-        self.assertEqual(data['override_custom_receipt_page'], "http://testserver/shoppingcart/postpay_callback/")
-
-        # Verify that the course ID and transaction type are included in "merchant-defined data"
-        self.assertEqual(data['merchant_defined_data1'], unicode(self.course.id))
-        self.assertEqual(data['merchant_defined_data2'], "verified")
-
-    def test_create_order_already_verified_prof_ed(self):
-        # Verify the student so we don't need to submit photos
-        self._verify_student()
+        self._assert_checked_out(params, patched_create_order, self.course.id, 'verified')
 
+    def test_create_order_prof_ed(self, patched_create_order):
         # Create a prof ed course
         course = CourseFactory.create()
-        CourseModeFactory(mode_slug="professional", course_id=course.id, min_price=10)
-
+        CourseModeFactory(mode_slug="professional", course_id=course.id, min_price=10, sku=self.make_sku())
         # Create an order for a prof ed course
         params = {'course_id': unicode(course.id)}
-        response = self._post(params)
-        self.assertEqual(response.status_code, 200)
-
-        # Verify that the course ID and transaction type are included in "merchant-defined data"
-        data = json.loads(response.content)
-        self.assertEqual(data['merchant_defined_data1'], unicode(course.id))
-        self.assertEqual(data['merchant_defined_data2'], "professional")
-
-    def test_create_order_for_no_id_professional(self):
+        self._assert_checked_out(params, patched_create_order, course.id, 'professional')
 
+    def test_create_order_no_id_professional(self, patched_create_order):
         # Create a no-id-professional ed course
         course = CourseFactory.create()
-        CourseModeFactory(mode_slug="no-id-professional", course_id=course.id, min_price=10)
-
+        CourseModeFactory(mode_slug="no-id-professional", course_id=course.id, min_price=10, sku=self.make_sku())
         # Create an order for a prof ed course
         params = {'course_id': unicode(course.id)}
-        response = self._post(params)
-        self.assertEqual(response.status_code, 200)
-
-        # Verify that the course ID and transaction type are included in "merchant-defined data"
-        data = json.loads(response.content)
-        self.assertEqual(data['merchant_defined_data1'], unicode(course.id))
-        self.assertEqual(data['merchant_defined_data2'], "no-id-professional")
-
-    def test_create_order_for_multiple_paid_modes(self):
+        self._assert_checked_out(params, patched_create_order, course.id, 'no-id-professional')
 
+    def test_create_order_for_multiple_paid_modes(self, patched_create_order):
         # Create a no-id-professional ed course
         course = CourseFactory.create()
-        CourseModeFactory(mode_slug="no-id-professional", course_id=course.id, min_price=10)
-        CourseModeFactory(mode_slug="professional", course_id=course.id, min_price=10)
-
+        CourseModeFactory(mode_slug="no-id-professional", course_id=course.id, min_price=10, sku=self.make_sku())
+        CourseModeFactory(mode_slug="professional", course_id=course.id, min_price=10, sku=self.make_sku())
         # Create an order for a prof ed course
         params = {'course_id': unicode(course.id)}
-        response = self._post(params)
-        self.assertEqual(response.status_code, 200)
-
-        # Verify that the course ID and transaction type are included in "merchant-defined data"
-        data = json.loads(response.content)
-        self.assertEqual(data['merchant_defined_data1'], unicode(course.id))
-        self.assertEqual(data['merchant_defined_data2'], "no-id-professional")
-
-    def test_create_order_set_donation_amount(self):
-        # Verify the student so we don't need to submit photos
-        self._verify_student()
+        # TODO jsa - is this the intended behavior?
+        self._assert_checked_out(params, patched_create_order, course.id, 'no-id-professional')
 
+    def test_create_order_bad_donation_amount(self, patched_create_order):
         # Create an order
         params = {
             'course_id': unicode(self.course.id),
-            'contribution': '1.23'
+            'contribution': '99.9'
         }
-        self._post(params)
+        self._assert_checked_out(params, patched_create_order, None, None, expected_status_code=400)
 
-        # Verify that the client's session contains the new donation amount
-        self.assertNotIn('donation_for_course', self.client.session)
+    def test_create_order_good_donation_amount(self, patched_create_order):
+        # Create an order
+        params = {
+            'course_id': unicode(self.course.id),
+            'contribution': '100.0'
+        }
+        self._assert_checked_out(params, patched_create_order, self.course.id, 'verified')
 
-    def _verify_student(self):
-        """ Simulate that the student's identity has already been verified. """
-        attempt = SoftwareSecurePhotoVerification.objects.create(user=self.user)
-        attempt.mark_ready()
-        attempt.submit()
-        attempt.approve()
-
-    @override_settings(ECOMMERCE_API_URL=EcommerceApiTestMixin.ECOMMERCE_API_URL,
-                       ECOMMERCE_API_SIGNING_KEY=EcommerceApiTestMixin.ECOMMERCE_API_SIGNING_KEY)
-    def test_create_order_with_ecommerce_api(self):
-        """ Verifies that the view communicates with the E-Commerce API to create orders. """
-        # Keep track of the original number of orders to verify the old code is not being called.
-        order_count = Order.objects.count()
-
-        # Add SKU to CourseModes
-        for course_mode in CourseMode.objects.filter(course_id=self.course.id):
-            course_mode.sku = uuid4().hex.decode('ascii')
-            course_mode.save()
-
-        # Mock the E-Commerce Service response
-        with self.mock_create_order():
-            self._verify_student()
-            params = {'course_id': unicode(self.course.id), 'contribution': 100}
-            response = self._post(params)
-
-        # Verify the response is correct.
+    def test_old_clients(self, patched_create_order):
+        # ensure the response to a request from a stale js client is modified so as
+        # not to break behavior in the browser.
+        # (XCOM-214) remove after release.
+        expected_payment_data = EcommerceApiTestMixin.PAYMENT_DATA.copy()
+        expected_payment_data['payment_form_data'].update({'foo': 'bar'})
+        patched_create_order.return_value = expected_payment_data
+        # there is no 'processor' parameter in the post payload, so the response should only contain payment form data.
+        params = {'course_id': unicode(self.course.id), 'contribution': 100}
+        response = self.client.post(reverse('verify_student_create_order'), params)
         self.assertEqual(response.status_code, 200)
-        self.assertEqual(response['Content-Type'], 'application/json')
-        self.assertEqual(json.loads(response.content), self.ECOMMERCE_API_SUCCESSFUL_BODY['payment_parameters'])
+        self.assertTrue(patched_create_order.called)
+        # ensure checkout args were correct
+        args = self._get_checkout_args(patched_create_order)
+        self.assertEqual(args['user'], self.user)
+        self.assertEqual(args['course_key'], self.course.id)
+        self.assertEqual(args['course_mode'].slug, 'verified')
+        # ensure response data was correct
+        data = json.loads(response.content)
+        self.assertEqual(data, {'foo': 'bar'})
 
-        # Verify old code is not called (e.g. no Order object created in LMS)
-        self.assertEqual(order_count, Order.objects.count())
 
-    def _add_course_mode_skus(self):
-        """ Add SKUs to the CourseMode objects for self.course. """
-        for course_mode in CourseMode.objects.filter(course_id=self.course.id):
-            course_mode.sku = uuid4().hex.decode('ascii')
-            course_mode.save()
+@patch('verify_student.views.checkout_with_shoppingcart', return_value=EcommerceApiTestMixin.PAYMENT_DATA)
+class TestCreateOrderShoppingCart(CheckoutTestMixin, ModuleStoreTestCase):
+    """ Test view behavior when the shoppingcart is used. """
 
-    @override_settings(ECOMMERCE_API_URL=EcommerceApiTestMixin.ECOMMERCE_API_URL,
-                       ECOMMERCE_API_SIGNING_KEY=EcommerceApiTestMixin.ECOMMERCE_API_SIGNING_KEY)
-    def test_create_order_with_ecommerce_api_errors(self):
-        """
-        Verifies that the view communicates with the E-Commerce API to create orders, and handles errors
-        appropriately.
-        """
-        self._add_course_mode_skus()
+    def make_sku(self):
+        """ Checkout is handled by shoppingcart when the course mode's sku is empty. """
+        return ''
 
-        with self.mock_create_order(side_effect=ApiError):
-            self._verify_student()
-            params = {'course_id': unicode(self.course.id), 'contribution': 100}
-            self.assertRaises(ApiError, self._post, params)
+    def _get_checkout_args(self, patched_create_order):
+        """ Assuming patched_create_order was called, return a mapping containing the call arguments."""
+        return dict(zip(('request', 'user', 'course_key', 'course_mode', 'amount'), patched_create_order.call_args[0]))
+
+
+@override_settings(
+    ECOMMERCE_API_URL=EcommerceApiTestMixin.ECOMMERCE_API_URL,
+    ECOMMERCE_API_SIGNING_KEY=EcommerceApiTestMixin.ECOMMERCE_API_SIGNING_KEY
+)
+@patch('verify_student.views.checkout_with_ecommerce_service', return_value=EcommerceApiTestMixin.PAYMENT_DATA)
+class TestCreateOrderEcommerceService(CheckoutTestMixin, EcommerceApiTestMixin, ModuleStoreTestCase):
+    """ Test view behavior when the ecommerce service is used. """
+
+    def make_sku(self):
+        """ Checkout is handled by the ecommerce service when the course mode's sku is nonempty. """
+        return uuid4().hex.decode('ascii')
+
+    def _get_checkout_args(self, patched_create_order):
+        """ Assuming patched_create_order was called, return a mapping containing the call arguments."""
+        return dict(zip(('user', 'course_key', 'course_mode', 'processor'), patched_create_order.call_args[0]))
 
 
 class TestCreateOrderView(ModuleStoreTestCase):
@@ -1099,7 +1094,7 @@ class TestCreateOrderView(ModuleStoreTestCase):
             photo_id_image=self.IMAGE_DATA
         )
         json_response = json.loads(response.content)
-        self.assertIsNotNone(json_response.get('orderNumber'))
+        self.assertIsNotNone(json_response['payment_form_data'].get('orderNumber'))  # TODO not canonical
 
         # Verify that the order exists and is configured correctly
         order = Order.objects.get(user=self.user)
@@ -1135,7 +1130,8 @@ class TestCreateOrderView(ModuleStoreTestCase):
         url = reverse('verify_student_create_order')
         data = {
             'contribution': contribution,
-            'course_id': course_id
+            'course_id': course_id,
+            'processor': None,
         }
 
         if face_image is not None:
@@ -1149,9 +1145,9 @@ class TestCreateOrderView(ModuleStoreTestCase):
         if expect_status_code == 200:
             json_response = json.loads(response.content)
             if expect_success:
-                self.assertTrue(json_response.get('success'))
+                self.assertEqual(set(json_response.keys()), PAYMENT_DATA_KEYS)
             else:
-                self.assertFalse(json_response.get('success'))
+                self.assertFalse(json_response['success'])
 
         return response
 
diff --git a/lms/djangoapps/verify_student/views.py b/lms/djangoapps/verify_student/views.py
index b2f98de1fb..60c10ac692 100644
--- a/lms/djangoapps/verify_student/views.py
+++ b/lms/djangoapps/verify_student/views.py
@@ -380,6 +380,14 @@ class PayAndVerifyView(View):
         # Determine the photo verification status
         verification_good_until = self._verification_valid_until(request.user)
 
+        # get available payment processors
+        if unexpired_paid_course_mode.sku:
+            # transaction will be conducted via ecommerce service
+            processors = EcommerceAPI().get_processors(request.user)
+        else:
+            # transaction will be conducted using legacy shopping cart
+            processors = [settings.CC_PROCESSOR_NAME]
+
         # Render the top-level page
         context = {
             'contribution_amount': contribution_amount,
@@ -393,7 +401,7 @@ class PayAndVerifyView(View):
             'is_active': json.dumps(request.user.is_active),
             'message_key': message,
             'platform_name': settings.PLATFORM_NAME,
-            'purchase_endpoint': get_purchase_endpoint(),
+            'processors': processors,
             'requirements': requirements,
             'user_full_name': full_name,
             'verification_deadline': (
@@ -644,26 +652,59 @@ class PayAndVerifyView(View):
         return (has_paid, bool(is_active))
 
 
-def create_order_with_ecommerce_service(user, course_key, course_mode):     # pylint: disable=invalid-name
-    """ Create a new order using the E-Commerce API. """
+def checkout_with_ecommerce_service(user, course_key, course_mode, processor):     # pylint: disable=invalid-name
+    """ Create a new basket and trigger immediate checkout, using the E-Commerce API. """
     try:
         api = EcommerceAPI()
         # Make an API call to create the order and retrieve the results
-        _order_number, _order_status, data = api.create_order(user, course_mode.sku)
-
+        response_data = api.create_basket(user, course_mode.sku, processor)
         # Pass the payment parameters directly from the API response.
-        return HttpResponse(json.dumps(data['payment_parameters']), content_type='application/json')
+        return response_data.get('payment_data')
     except ApiError:
         params = {'username': user.username, 'mode': course_mode.slug, 'course_id': unicode(course_key)}
         log.error('Failed to create order for %(username)s %(mode)s mode of %(course_id)s', params)
         raise
 
 
+def checkout_with_shoppingcart(request, user, course_key, course_mode, amount):
+    """ Create an order and trigger checkout using shoppingcart."""
+    cart = Order.get_cart_for_user(user)
+    cart.clear()
+    enrollment_mode = course_mode.slug
+    CertificateItem.add_to_order(cart, course_key, amount, enrollment_mode)
+
+    # Change the order's status so that we don't accidentally modify it later.
+    # We need to do this to ensure that the parameters we send to the payment system
+    # match what we store in the database.
+    # (Ordinarily we would do this client-side when the user submits the form, but since
+    # the JavaScript on this page does that immediately, we make the change here instead.
+    # This avoids a second AJAX call and some additional complication of the JavaScript.)
+    # If a user later re-enters the verification / payment flow, she will create a new order.
+    cart.start_purchase()
+
+    callback_url = request.build_absolute_uri(
+        reverse("shoppingcart.views.postpay_callback")
+    )
+
+    payment_data = {
+        'payment_processor_name': settings.CC_PROCESSOR_NAME,
+        'payment_page_url': get_purchase_endpoint(),
+        'payment_form_data': get_signed_purchase_params(
+            cart,
+            callback_url=callback_url,
+            extra_data=[unicode(course_key), course_mode.slug]
+        ),
+    }
+    return payment_data
+
+
 @require_POST
 @login_required
 def create_order(request):
     """
-    Submit PhotoVerification and create a new Order for this verified cert
+    This endpoint is named 'create_order' for backward compatibility, but its
+    actual use is to add a single product to the user's cart and request
+    immediate checkout.
     """
     # Only submit photos if photo data is provided by the client.
     # TODO (ECOM-188): Once the A/B test of decoupling verified / payment
@@ -724,35 +765,23 @@ def create_order(request):
         return HttpResponseBadRequest(_("No selected price or selected price is below minimum."))
 
     if current_mode.sku:
-        return create_order_with_ecommerce_service(request.user, course_id, current_mode)
+        # if request.POST doesn't contain 'processor' then the service's default payment processor will be used.
+        payment_data = checkout_with_ecommerce_service(
+            request.user,
+            course_id,
+            current_mode,
+            request.POST.get('processor')
+        )
+    else:
+        payment_data = checkout_with_shoppingcart(request, request.user, course_id, current_mode, amount)
 
-    # I know, we should check this is valid. All kinds of stuff missing here
-    cart = Order.get_cart_for_user(request.user)
-    cart.clear()
-    enrollment_mode = current_mode.slug
-    CertificateItem.add_to_order(cart, course_id, amount, enrollment_mode)
-
-    # Change the order's status so that we don't accidentally modify it later.
-    # We need to do this to ensure that the parameters we send to the payment system
-    # match what we store in the database.
-    # (Ordinarily we would do this client-side when the user submits the form, but since
-    # the JavaScript on this page does that immediately, we make the change here instead.
-    # This avoids a second AJAX call and some additional complication of the JavaScript.)
-    # If a user later re-enters the verification / payment flow, she will create a new order.
-    cart.start_purchase()
-
-    callback_url = request.build_absolute_uri(
-        reverse("shoppingcart.views.postpay_callback")
-    )
-
-    params = get_signed_purchase_params(
-        cart,
-        callback_url=callback_url,
-        extra_data=[unicode(course_id), current_mode.slug]
-    )
-
-    params['success'] = True
-    return HttpResponse(json.dumps(params), content_type="text/json")
+    if 'processor' not in request.POST:
+        # (XCOM-214) To be removed after release.
+        # the absence of this key in the POST payload indicates that the request was initiated from
+        # a stale js client, which expects a response containing only the 'payment_form_data' part of
+        # the payment data result.
+        payment_data = payment_data['payment_form_data']
+    return HttpResponse(json.dumps(payment_data), content_type="application/json")
 
 
 @require_POST
diff --git a/lms/static/js/spec/photocapture_spec.js b/lms/static/js/spec/photocapture_spec.js
index da0826a896..85ec82ce75 100644
--- a/lms/static/js/spec/photocapture_spec.js
+++ b/lms/static/js/spec/photocapture_spec.js
@@ -4,7 +4,7 @@ define(['backbone', 'jquery', 'js/verify_student/photocapture'],
         describe("Photo Verification", function () {
 
             beforeEach(function () {
-                setFixtures('<div id="order-error" style="display: none;"></div><input type="radio" name="contribution" value="35" id="contribution-35" checked="checked"><input type="radio" id="contribution-other" name="contribution" value=""><input type="text" size="9" name="contribution-other-amt" id="contribution-other-amt" value="30"><img id="face_image" src="src="data:image/png;base64,dummy"><img id="photo_id_image" src="src="data:image/png;base64,dummy"><button id="pay_button">pay button</button>');
+                setFixtures('<div id="order-error" style="display: none;"></div><input type="radio" name="contribution" value="35" id="contribution-35" checked="checked"><input type="radio" id="contribution-other" name="contribution" value=""><input type="text" size="9" name="contribution-other-amt" id="contribution-other-amt" value="30"><img id="face_image" src="src="data:image/png;base64,dummy"><img id="photo_id_image" src="src="data:image/png;base64,dummy"><button class="payment-button">pay button</button>');
             });
 
             it('retake photo', function () {
@@ -27,7 +27,7 @@ define(['backbone', 'jquery', 'js/verify_student/photocapture'],
                 });
                 submitToPaymentProcessing();
                 expect(window.submitForm).toHaveBeenCalled();
-                expect($("#pay_button")).toHaveClass("is-disabled");
+                expect($(".payment-button")).toHaveClass("is-disabled");
             });
 
             it('Error during process', function () {
@@ -44,7 +44,7 @@ define(['backbone', 'jquery', 'js/verify_student/photocapture'],
                 expect(window.showSubmissionError).toHaveBeenCalled();
 
                 // make sure the button isn't disabled
-                expect($("#pay_button")).not.toHaveClass("is-disabled");
+                expect($(".payment-button")).not.toHaveClass("is-disabled");
 
                 // but also make sure that it was disabled during the ajax call
                 expect($.fn.addClass).toHaveBeenCalledWith("is-disabled");
diff --git a/lms/static/js/spec/student_account/enrollment_spec.js b/lms/static/js/spec/student_account/enrollment_spec.js
index cb8ab745af..742b027114 100644
--- a/lms/static/js/spec/student_account/enrollment_spec.js
+++ b/lms/static/js/spec/student_account/enrollment_spec.js
@@ -5,7 +5,7 @@ define(['js/common_helpers/ajax_helpers', 'js/student_account/enrollment'],
         describe( 'edx.student.account.EnrollmentInterface', function() {
 
             var COURSE_KEY = 'edX/DemoX/Fall',
-                ENROLL_URL = '/commerce/orders/',
+                ENROLL_URL = '/commerce/baskets/',
                 FORWARD_URL = '/course_modes/choose/edX/DemoX/Fall/',
                 EMBARGO_MSG_URL = '/embargo/blocked-message/enrollment/default/';
 
diff --git a/lms/static/js/spec/verify_student/make_payment_step_view_spec.js b/lms/static/js/spec/verify_student/make_payment_step_view_spec.js
index fa90b016e3..1ec453cee2 100644
--- a/lms/static/js/spec/verify_student/make_payment_step_view_spec.js
+++ b/lms/static/js/spec/verify_student/make_payment_step_view_spec.js
@@ -11,8 +11,6 @@ define([
 
         describe( 'edx.verify_student.MakePaymentStepView', function() {
 
-            var PAYMENT_URL = "/pay";
-
             var PAYMENT_PARAMS = {
                 orderId: "test-order",
                 signature: "abcd1234"
@@ -21,7 +19,7 @@ define([
             var STEP_DATA = {
                 minPrice: "12",
                 currency: "usd",
-                purchaseEndpoint: PAYMENT_URL,
+                processors: ["test-payment-processor"],
                 courseKey: "edx/test/test",
                 courseModeSlug: 'verified'
             };
@@ -50,15 +48,16 @@ define([
             };
 
             var expectPaymentButtonEnabled = function( isEnabled ) {
-                var appearsDisabled = $( '#pay_button' ).hasClass( 'is-disabled' ),
-                    isDisabled = $( '#pay_button' ).prop( 'disabled' );
+                var el = $( '.payment-button'),
+                    appearsDisabled = el.hasClass( 'is-disabled' ),
+                    isDisabled = el.prop( 'disabled' );
 
                 expect( !appearsDisabled ).toEqual( isEnabled );
                 expect( !isDisabled ).toEqual( isEnabled );
             };
 
             var expectPaymentDisabledBecauseInactive = function() {
-                var payButton = $( '#pay_button' );
+                var payButton = $( '.payment_button' );
 
                 // Payment button should be hidden
                 expect( payButton.length ).toEqual(0);
@@ -67,21 +66,22 @@ define([
             var goToPayment = function( requests, kwargs ) {
                 var params = {
                     contribution: kwargs.amount || "",
-                    course_id: kwargs.courseId || ""
+                    course_id: kwargs.courseId || "",
+                    processor: kwargs.processor || ""
                 };
 
                 // Click the "go to payment" button
-                $( '#pay_button' ).click();
+                $( '.payment-button' ).click();
 
                 // Verify that the request was made to the server
-                AjaxHelpers.expectRequest(
-                    requests, "POST", "/verify_student/create_order/",
-                    $.param( params )
+                AjaxHelpers.expectPostRequest(
+                    requests, "/verify_student/create_order/", $.param( params )
                 );
 
                 // Simulate the server response
                 if ( kwargs.succeeds ) {
-                    AjaxHelpers.respondWithJson( requests, PAYMENT_PARAMS );
+                    // TODO put fixture responses in the right place
+                    AjaxHelpers.respondWithJson( requests, {payment_page_url: 'http://payment-page-url/', payment_form_data: {foo: 'bar'}} );
                 } else {
                     AjaxHelpers.respondWithTextError( requests, 400, SERVER_ERROR_MSG );
                 }
@@ -95,7 +95,7 @@ define([
 
                 expect(form.serialize()).toEqual($.param(params));
                 expect(form.attr('method')).toEqual("POST");
-                expect(form.attr('action')).toEqual(PAYMENT_URL);
+                expect(form.attr('action')).toEqual('http://payment-page-url/');
             };
 
             beforeEach(function() {
@@ -114,9 +114,10 @@ define([
                 goToPayment( requests, {
                     amount: STEP_DATA.minPrice,
                     courseId: STEP_DATA.courseKey,
+                    processor: STEP_DATA.processors[0],
                     succeeds: true
                 });
-                expectPaymentSubmitted( view, PAYMENT_PARAMS );
+                expectPaymentSubmitted( view, {foo: 'bar'} );
             });
 
             it( 'by default minimum price is selected if no suggested prices are given', function() {
@@ -129,9 +130,10 @@ define([
                 goToPayment( requests, {
                     amount: STEP_DATA.minPrice,
                     courseId: STEP_DATA.courseKey,
+                    processor: STEP_DATA.processors[0],
                     succeeds: true
                 });
-                expectPaymentSubmitted( view, PAYMENT_PARAMS );
+                expectPaymentSubmitted( view, {foo: 'bar'} );
             });
 
             it( 'min price is always selected even if contribution amount is provided', function() {
@@ -156,6 +158,7 @@ define([
                 goToPayment( requests, {
                     amount: STEP_DATA.minPrice,
                     courseId: STEP_DATA.courseKey,
+                    processor: STEP_DATA.processors[0],
                     succeeds: false
                 });
 
diff --git a/lms/static/js/student_account/enrollment.js b/lms/static/js/student_account/enrollment.js
index dbaaf6a1c3..6374e2f3e4 100644
--- a/lms/static/js/student_account/enrollment.js
+++ b/lms/static/js/student_account/enrollment.js
@@ -9,7 +9,7 @@ var edx = edx || {};
     edx.student.account.EnrollmentInterface = {
 
         urls: {
-            orders: '/commerce/orders/',
+            baskets: '/commerce/baskets/',
         },
 
         headers: {
@@ -26,7 +26,7 @@ var edx = edx || {};
                 data = JSON.stringify(data_obj);
 
             $.ajax({
-                url: this.urls.orders,
+                url: this.urls.baskets,
                 type: 'POST',
                 contentType: 'application/json; charset=utf-8',
                 data: data,
diff --git a/lms/static/js/verify_student/pay_and_verify.js b/lms/static/js/verify_student/pay_and_verify.js
index c7a8a8b043..0264d6d4c7 100644
--- a/lms/static/js/verify_student/pay_and_verify.js
+++ b/lms/static/js/verify_student/pay_and_verify.js
@@ -59,7 +59,7 @@ var edx = edx || {};
                     function( price ) { return Boolean( price ); }
                 ),
                 currency: el.data('course-mode-currency'),
-                purchaseEndpoint: el.data('purchase-endpoint'),
+                processors: el.data('processors'),
                 verificationDeadline: el.data('verification-deadline'),
                 courseModeSlug: el.data('course-mode-slug'),
                 alreadyVerified: el.data('already-verified'),
diff --git a/lms/static/js/verify_student/photocapture.js b/lms/static/js/verify_student/photocapture.js
index 4d4780a5b9..7d3716238c 100644
--- a/lms/static/js/verify_student/photocapture.js
+++ b/lms/static/js/verify_student/photocapture.js
@@ -69,7 +69,7 @@ function refereshPageMessage() {
 }
 
 var submitToPaymentProcessing = function() {
-  $("#pay_button").addClass('is-disabled').attr('aria-disabled', true);
+  $(".payment-button").addClass('is-disabled').attr('aria-disabled', true);
   var contribution_input = $("input[name='contribution']:checked")
   var contribution = 0;
   if(contribution_input.attr('id') == 'contribution-other') {
@@ -96,7 +96,7 @@ var submitToPaymentProcessing = function() {
       }
     },
     error:function(xhr,status,error) {
-      $("#pay_button").removeClass('is-disabled').attr('aria-disabled', false);
+      $(".payment-button").removeClass('is-disabled').attr('aria-disabled', false);
       showSubmissionError()
     }
   });
@@ -290,7 +290,7 @@ function waitForFlashLoad(func, flash_object) {
 
 $(document).ready(function() {
   $(".carousel-nav").addClass('sr');
-  $("#pay_button").click(function(){
+  $(".payment-button").click(function(){
       analytics.pageview("Payment Form");
       submitToPaymentProcessing();
   });
@@ -306,7 +306,7 @@ $(document).ready(function() {
   // prevent browsers from keeping this button checked
   $("#confirm_pics_good").prop("checked", false)
   $("#confirm_pics_good").change(function() {
-      $("#pay_button").toggleClass('disabled');
+      $(".payment-button").toggleClass('disabled');
       $("#reverify_button").toggleClass('disabled');
       $("#midcourse_reverify_button").toggleClass('disabled');
   });
diff --git a/lms/static/js/verify_student/views/make_payment_step_view.js b/lms/static/js/verify_student/views/make_payment_step_view.js
index 0dd80092b4..4d7904f752 100644
--- a/lms/static/js/verify_student/views/make_payment_step_view.js
+++ b/lms/static/js/verify_student/views/make_payment_step_view.js
@@ -3,7 +3,7 @@
  */
 var edx = edx || {};
 
-(function( $, _, gettext ) {
+(function( $, _, gettext, interpolate_text ) {
     'use strict';
 
     edx.verify_student = edx.verify_student || {};
@@ -28,12 +28,45 @@ var edx = edx || {};
             };
         },
 
+        _getProductText: function( modeSlug, isUpgrade ) {
+            switch ( modeSlug ) {
+                case "professional":
+                    return gettext( "Professional Education Verified Certificate" );
+                case "no-id-professional":
+                    return gettext( "Professional Education" );
+                default:
+                    if ( isUpgrade ) {
+                        return gettext( "Verified Certificate upgrade" );
+                    } else {
+                        return gettext( "Verified Certificate" );
+                    }
+            }
+        },
+
+        _getPaymentButtonText: function(processorName) {
+            if (processorName.toLowerCase().substr(0, 11)=='cybersource') {
+                return gettext('Pay with Credit Card');
+            } else {
+                // This is mainly for testing as no other processors are supported right now.
+                // Translators: 'processor' is the name of a third-party payment processing vendor (example: "PayPal")
+                return interpolate_text(gettext('Pay with {processor}'), {processor: processorName});
+            }
+        },
+
+        _getPaymentButtonHtml: function(processorName) {
+            var self = this;
+            return _.template(
+                '<a class="next action-primary payment-button" id="<%- name %>" tab-index="0"><%- text %></a> '
+            )({name: processorName, text: self._getPaymentButtonText(processorName)});
+        },
+
         postRender: function() {
             var templateContext = this.templateContext(),
                 hasVisibleReqs = _.some(
                     templateContext.requirements,
                     function( isVisible ) { return isVisible; }
-                );
+                ),
+                self = this;
 
             // Track a virtual pageview, for easy funnel reconstruction.
             window.analytics.page( 'payment', this.templateName );
@@ -59,25 +92,41 @@ var edx = edx || {};
                 this.setPaymentEnabled( true );
             }
 
+            // render the name of the product being paid for
+            $( 'div.payment-buttons span.product-name').append(
+                self._getProductText( templateContext.courseModeSlug, templateContext.upgrade )
+            );
+
+            // create a button for each payment processor
+            _.each(templateContext.processors, function(processorName) {
+                $( 'div.payment-buttons' ).append( self._getPaymentButtonHtml(processorName) );
+            });
+
             // Handle payment submission
-            $( '#pay_button' ).on( 'click', _.bind( this.createOrder, this ) );
+            $( '.payment-button' ).on( 'click', _.bind( this.createOrder, this ) );
         },
 
         setPaymentEnabled: function( isEnabled ) {
             if ( _.isUndefined( isEnabled ) ) {
                 isEnabled = true;
             }
-            $( '#pay_button' )
+            $( '.payment-button' )
                 .toggleClass( 'is-disabled', !isEnabled )
                 .prop( 'disabled', !isEnabled )
                 .attr('aria-disabled', !isEnabled);
         },
 
-        createOrder: function() {
+        // This function invokes the create_order endpoint.  It will either create an order in
+        // the lms' shoppingcart or a basket in Otto, depending on which backend the request course
+        // mode is configured to use.  In either case, the checkout process will be triggered,
+        // and the expected response will consist of an appropriate payment processor endpoint for
+        // redirection, along with parameters to be passed along in the request.
+        createOrder: function(event) {
             var paymentAmount = this.getPaymentAmount(),
                 postData = {
+                    'processor': event.target.id,
                     'contribution': paymentAmount,
-                    'course_id': this.stepData.courseKey,
+                    'course_id': this.stepData.courseKey
                 };
 
             // Disable the payment button to prevent multiple submissions
@@ -98,21 +147,21 @@ var edx = edx || {};
 
         },
 
-        handleCreateOrderResponse: function( paymentParams ) {
-            // At this point, the order has been created on the server,
+        handleCreateOrderResponse: function( paymentData ) {
+            // At this point, the basket has been created on the server,
             // and we've received signed payment parameters.
             // We need to dynamically construct a form using
             // these parameters, then submit it to the payment processor.
-            // This will send the user to a hosted order page,
-            // where she can enter credit card information.
+            // This will send the user to an externally-hosted page
+            // where she can proceed with payment.
             var form = $( '#payment-processor-form' );
 
             $( 'input', form ).remove();
 
-            form.attr( 'action', this.stepData.purchaseEndpoint );
+            form.attr( 'action', paymentData.payment_page_url );
             form.attr( 'method', 'POST' );
 
-            _.each( paymentParams, function( value, key ) {
+            _.each( paymentData.payment_form_data, function( value, key ) {
                 $('<input>').attr({
                     type: 'hidden',
                     name: key,
@@ -200,4 +249,4 @@ var edx = edx || {};
 
     });
 
-})( jQuery, _, gettext );
+})( jQuery, _, gettext, interpolate_text );
diff --git a/lms/static/sass/_developer.scss b/lms/static/sass/_developer.scss
index 434add48ae..cdfcd804f9 100644
--- a/lms/static/sass/_developer.scss
+++ b/lms/static/sass/_developer.scss
@@ -50,3 +50,22 @@
   padding: ($baseline*1.5) $baseline;
   text-align: center;
 }
+
+// for verify_student/make_payment_step.underscore
+.payment-buttons {
+
+  .purchase {
+    float: left;
+    padding: ($baseline*.5) 0;
+
+    .product-info, .product-name, .price {
+      @extend %t-ultrastrong;
+      color: $m-blue-d3;
+    }
+  }
+
+  .payment-button {
+    float: right;
+    @include margin-left( ($baseline/2) );
+  }
+}
diff --git a/lms/templates/verify_student/make_payment_step.underscore b/lms/templates/verify_student/make_payment_step.underscore
index 2c7260cd4d..f4e29a2c5d 100644
--- a/lms/templates/verify_student/make_payment_step.underscore
+++ b/lms/templates/verify_student/make_payment_step.underscore
@@ -98,11 +98,16 @@
     <% } %>
 
   <% if ( isActive ) { %>
-  <div class="nav-wizard is-ready center">
+  <div class="payment-buttons nav-wizard is-ready center">
     <input type="hidden" name="contribution" value="<%- minPrice %>" />
-    <a class="next action-primary" id="pay_button" tab-index="0">
-      <%- gettext( "Continue to payment" ) %> ($<%- minPrice %>)
-    </a>
+    <div class="purchase">
+      <p class="product-info"><span class="product-name"></span> <%- gettext( "price" ) %>: <span class="price">$<%- minPrice %></span></p>
+    </div>
+    <div class="pay-options">
+      <%
+      // payment buttons will go here
+      %>
+    </div>
   </div>
   <% } %>
 
diff --git a/lms/templates/verify_student/pay_and_verify.html b/lms/templates/verify_student/pay_and_verify.html
index 9081daf06e..259f646cc3 100644
--- a/lms/templates/verify_student/pay_and_verify.html
+++ b/lms/templates/verify_student/pay_and_verify.html
@@ -67,7 +67,7 @@ from verify_student.views import PayAndVerifyView
       data-course-mode-suggested-prices='${course_mode.suggested_prices}'
       data-course-mode-currency='${course_mode.currency}'
       data-contribution-amount='${contribution_amount}'
-      data-purchase-endpoint='${purchase_endpoint}'
+      data-processors='${json.dumps(processors)}'
       data-verification-deadline='${verification_deadline}'
       data-display-steps='${json.dumps(display_steps)}'
       data-current-step='${current_step}'