diff --git a/app/assets/javascripts/darkswarm/services/order_cycle_resource.js.coffee b/app/assets/javascripts/darkswarm/services/order_cycle_resource.js.coffee
index 32d70d54a5..ba8d5266fe 100644
--- a/app/assets/javascripts/darkswarm/services/order_cycle_resource.js.coffee
+++ b/app/assets/javascripts/darkswarm/services/order_cycle_resource.js.coffee
@@ -1,21 +1,21 @@
 Darkswarm.factory 'OrderCycleResource', ($resource) ->
-  $resource('/api/order_cycles/:id', {}, {
+  $resource('/api/order_cycles/:id.json', {}, {
     'products':
       method: 'GET'
       isArray: true
-      url: '/api/order_cycles/:id/products'
+      url: '/api/order_cycles/:id/products.json'
       params:
         id: '@id'
     'taxons':
       method: 'GET'
       isArray: true
-      url: '/api/order_cycles/:id/taxons'
+      url: '/api/order_cycles/:id/taxons.json'
       params:
         id: '@id'
     'properties':
       method: 'GET'
       isArray: true
-      url: '/api/order_cycles/:id/properties'
+      url: '/api/order_cycles/:id/properties.json'
       params:
         id: '@id'
   })
diff --git a/app/controllers/api/base_controller.rb b/app/controllers/api/base_controller.rb
index b75c92e22e..54feee3802 100644
--- a/app/controllers/api/base_controller.rb
+++ b/app/controllers/api/base_controller.rb
@@ -10,6 +10,9 @@ module Api
     include Spree::Core::ControllerHelpers::SSL
     include ::ActionController::Head
     include ::ActionController::ConditionalGet
+    include ActionView::Layouts
+
+    layout false
 
     attr_accessor :current_api_user
 
diff --git a/app/controllers/api/order_cycles_controller.rb b/app/controllers/api/order_cycles_controller.rb
index ddc7b15fa5..c40ec641b2 100644
--- a/app/controllers/api/order_cycles_controller.rb
+++ b/app/controllers/api/order_cycles_controller.rb
@@ -20,7 +20,7 @@ module Api
         search_params
       ).products_json
 
-      render plain: products, content_type: "application/json"
+      render plain: products
     rescue ProductsRenderer::NoProducts
       render_no_products
     end
@@ -33,19 +33,19 @@ module Api
 
       render plain: ActiveModel::ArraySerializer.new(
         taxons, each_serializer: Api::TaxonSerializer
-      ).to_json, content_type: "application/json"
+      ).to_json
     end
 
     def properties
       render plain: ActiveModel::ArraySerializer.new(
         product_properties | producer_properties, each_serializer: Api::PropertySerializer
-      ).to_json, content_type: "application/json"
+      ).to_json
     end
 
     private
 
     def render_no_products
-      render status: :not_found, json: ''
+      render status: :not_found, json: {}
     end
 
     def product_properties
diff --git a/app/models/concerns/api_action_caching.rb b/app/controllers/concerns/api_action_caching.rb
similarity index 100%
rename from app/models/concerns/api_action_caching.rb
rename to app/controllers/concerns/api_action_caching.rb
diff --git a/spec/controllers/api/order_cycles_controller_spec.rb b/spec/controllers/api/order_cycles_controller_spec.rb
index aacbeda57b..d41d26aa43 100644
--- a/spec/controllers/api/order_cycles_controller_spec.rb
+++ b/spec/controllers/api/order_cycles_controller_spec.rb
@@ -148,6 +148,21 @@ module Api
           expect(product_ids).to include product3.id
         end
       end
+
+      context "when the order cycle is closed" do
+        before do
+          allow(controller).to receive(:order_cycle) { order_cycle }
+          allow(order_cycle).to receive(:open?) { false }
+        end
+
+        # Regression test for https://github.com/openfoodfoundation/openfoodnetwork/issues/6491
+        it "renders no products without error" do
+          api_get :products, id: order_cycle.id, distributor: distributor.id
+
+          expect(json_response).to eq({})
+          expect(response).to have_http_status :not_found
+        end
+      end
     end
 
     describe "#taxons" do
diff --git a/spec/features/consumer/caching/shops_caching_spec.rb b/spec/features/consumer/caching/shops_caching_spec.rb
index c525e569d9..6f71868753 100644
--- a/spec/features/consumer/caching/shops_caching_spec.rb
+++ b/spec/features/consumer/caching/shops_caching_spec.rb
@@ -47,8 +47,8 @@ feature "Shops caching", js: true, caching: true do
     let(:exchange) { order_cycle.exchanges.to_enterprises(distributor).outgoing.first }
 
     let(:test_domain) { "#{Capybara.current_session.server.host}:#{Capybara.current_session.server.port}" }
-    let(:taxons_key) { "views/#{test_domain}/api/order_cycles/#{order_cycle.id}/taxons?distributor=#{distributor.id}.json" }
-    let(:properties_key) { "views/#{test_domain}/api/order_cycles/#{order_cycle.id}/properties?distributor=#{distributor.id}.json" }
+    let(:taxons_key) { "views/#{test_domain}/api/order_cycles/#{order_cycle.id}/taxons.json?distributor=#{distributor.id}" }
+    let(:properties_key) { "views/#{test_domain}/api/order_cycles/#{order_cycle.id}/properties.json?distributor=#{distributor.id}" }
     let(:options) { { expires_in: CacheService::FILTERS_EXPIRY } }
 
     before do
diff --git a/spec/javascripts/unit/darkswarm/services/products_spec.js.coffee b/spec/javascripts/unit/darkswarm/services/products_spec.js.coffee
index db9ed1e628..d0114c05dd 100644
--- a/spec/javascripts/unit/darkswarm/services/products_spec.js.coffee
+++ b/spec/javascripts/unit/darkswarm/services/products_spec.js.coffee
@@ -13,7 +13,7 @@ describe 'Products service', ->
   properties = null
   taxons = null
   GmapsGeo = {}
-  endpoint = "/api/order_cycles/1/products?distributor=1"
+  endpoint = "/api/order_cycles/1/products.json?distributor=1"
 
   beforeEach ->
     product =