diff --git a/app/serializers/api/order_serializer.rb b/app/serializers/api/order_serializer.rb
index fb1c3f28d3..8c8260a901 100644
--- a/app/serializers/api/order_serializer.rb
+++ b/app/serializers/api/order_serializer.rb
@@ -1,8 +1,10 @@
 class Api::OrderSerializer < ActiveModel::Serializer
-  attributes :id, :completed_at, :total, :state, :shipment_state, :payment_state, :outstanding_balance, :total_money, :balance_money
+  attributes :id, :completed_at, :total, :state, :shipment_state, :payment_state, :outstanding_balance, :total_money, :balance_money, :payments
+
+  has_many :payments, serializer: Api::PaymentSerializer
 
   def completed_at
-    object.completed_at.blank? ? "" : object.completed_at.strftime("%F %T")
+    object.completed_at.blank? ? "" : object.completed_at.to_formatted_s(:long_ordinal)
   end
 
   def total_money
diff --git a/app/serializers/api/payment_serializer.rb b/app/serializers/api/payment_serializer.rb
new file mode 100644
index 0000000000..029143403f
--- /dev/null
+++ b/app/serializers/api/payment_serializer.rb
@@ -0,0 +1,14 @@
+class Api::PaymentSerializer < ActiveModel::Serializer
+  attributes :identifier, :amount, :updated_at, :payment_method
+  def payment_method
+    object.payment_method.name
+  end
+
+  def amount
+    object.amount.to_money.to_s
+  end
+
+  def updated_at
+    object.updated_at.to_formatted_s(:long_ordinal)
+  end
+end