app/assets/javascripts/spree/backend/payments/edit.js.coffee in spree_backend-3.0.0.rc4 vs app/assets/javascripts/spree/backend/payments/edit.js.coffee in spree_backend-3.0.0

@@ -1,10 +1,10 @@
 jQuery ($) ->
   # Payment model
   order_id = $('#payments').data('order-id')
   class Payment
     constructor: (id) ->
-      @url  = Spree.url("#{Spree.routes.payments_api(order_id)}/#{id}.json")
+      @url  = Spree.url("#{Spree.routes.payments_api(order_id)}/#{id}.json" + '?token=' + Spree.api_key)
       @json = $.getJSON @url.toString(), (data) =>
         @data = data
 
     if_pending: (callback) ->
       @json.done (data) ->