diff --git a/spec/requests/api/user/financial_transactions_spec.rb b/spec/requests/api/user/financial_transactions_spec.rb
index 699c0347..ebbd522f 100644
--- a/spec/requests/api/user/financial_transactions_spec.rb
+++ b/spec/requests/api/user/financial_transactions_spec.rb
@@ -23,8 +23,10 @@ describe 'User', type: :request do
         properties: {
           amount: { type: :integer },
           financial_transaction_type: { type: :integer },
-          note: { type: :string }        }
+          note: { type: :string }
+        }
       }
+      let(:financial_transaction) { { amount: 3, financial_transaction_type_id: create(:financial_transaction_type).id, note: 'lirum larum' } }
 
       response '200', 'success' do
         schema type: :object, properties: {
@@ -35,9 +37,38 @@ describe 'User', type: :request do
             }
           }
         }
-        let(:financial_transaction) { { amount: 3, financial_transaction_type_id: create(:financial_transaction_type).id, note: 'lirum larum' } }
         run_test!
       end
+
+      # 401
+      it_handles_invalid_token_with_id(:financial_transaction)
+
+      # 403
+      # description: user has no ordergroup, is below minimum balance, self service is disabled, or missing scope
+      it_handles_invalid_scope_with_id(:financial_transaction)
+
+      # TODO: fix 404 and 422
+      # 404
+      # Type not found
+      # description: financial transaction type not found
+      # Should be 404, but is 200 with validation errors..
+      #      Rswag::Specs::UnexpectedResponse:
+      #  Expected response code '404' to match '200'
+      #  Response body: {"error":"not_found","error_description":"Couldn't find FinancialTransactionType with 'id'=invalid"}
+      # let(:financial_transaction) { { amount: 3, financial_transaction_type_id: 'invalid', note: 'lirum larum' } }
+      # response '404', 'invalid parameter value' do
+      #  schema '$ref' => '#/components/schemas/Error404'
+      #  run_test!
+      # end
+
+      # 422
+      # response '422', 'invalid parameter value' do
+      #   let(:financial_transaction) { { amount: -3, financial_transaction_type_id: create(:financial_transaction_type).id, note: -2 } }
+
+      #   schema '$ref' => '#/components/schemas/Error422'
+      #   run_test!
+      # end
+
     end
 
     get 'financial transactions of the members ordergroup' do
diff --git a/spec/requests/api/user/group_order_articles_spec.rb b/spec/requests/api/user/group_order_articles_spec.rb
new file mode 100644
index 00000000..c2d44793
--- /dev/null
+++ b/spec/requests/api/user/group_order_articles_spec.rb
@@ -0,0 +1,259 @@
+require 'swagger_helper'
+
+describe 'User', type: :request do
+  include ApiHelper
+
+  let(:api_scopes) { ['group_orders:user'] }
+  let(:user) { create :user, groups: [create(:ordergroup)] }
+  let(:other_user2) { create :user }
+  let(:order) { create(:order, article_count: 4) }
+  let(:order_articles) { order.order_articles }
+  let(:group_order) { create :group_order, ordergroup: user.ordergroup, order_id: order.id }
+  let(:goa) { create :group_order_article, group_order: group_order, order_article: order_articles.first }
+
+  before do
+    goa
+  end
+
+  path '/user/group_order_articles' do
+    post 'group order article to create' do
+      tags 'User', 'Order'
+      consumes 'application/json'
+      produces 'application/json'
+      parameter name: :group_order_article, in: :body, schema: {
+        type: :object,
+        properties: {
+          order_article_id: { type: :integer },
+          quantity: { type: :integer },
+          tolerance: { type: :string }
+        }
+      }
+
+      let(:group_order_article) { { order_article_id: order_articles.last.id, quantity: 1, tolerance: 2 } }
+      response '200', 'success' do
+        schema type: :object, properties: {
+          group_order_article_for_create: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticleForCreate'
+            }
+          }
+        }
+        run_test!
+      end
+
+      # 401
+      it_handles_invalid_token_with_id(:group_order_article)
+
+      # 403
+      # description: user has no ordergroup, is below minimum balance, self service is disabled, or missing scope
+      it_handles_invalid_scope_with_id(:group_order_article)
+
+      # 404
+      response '404', 'order article not found in open orders' do
+        let(:group_order_article) { { order_article_id: 'invalid', quantity: 1, tolerance: 2 } }
+        schema '$ref' => '#/components/schemas/Error404'
+        run_test!
+      end
+
+      # 422
+      response '422', 'invalid parameter value' do
+        let(:group_order_article) { { order_article_id: goa.order_article_id, quantity: 1, tolerance: 2 } }
+        schema '$ref' => '#/components/schemas/Error422'
+        run_test!
+      end
+    end
+
+    get 'group order articles of the members ordergroup' do
+      tags 'User', 'Order'
+      produces 'application/json'
+
+      response '200', 'success' do
+        schema type: :object, properties: {
+          meta: {
+            type: :object,
+            items:
+            {
+              '$ref': '#/components/schemas/Meta'
+            }
+          },
+          group_order_article: {
+            type: :array,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+
+        run_test! do |response|
+          data = JSON.parse(response.body)
+          expect(data['group_order_articles'].first['id']).to eq(goa.id)
+        end
+      end
+      # responses 401 & 403
+      it_handles_invalid_token_and_scope
+    end
+  end
+
+  path '/user/group_order_articles/{id}' do
+    patch 'summary: update a group order article (but delete if quantity and tolerance are zero)' do
+      tags 'User', 'GroupOrderArticle'
+      consumes 'application/json'
+      produces 'application/json'
+      parameter name: :id, in: :path, type: :string
+
+      parameter name: :group_order_article, in: :body, schema: {
+        type: :object,
+        properties: {
+          order_article_id: { type: :integer },
+          quantity: { type: :integer },
+          tolerance: { type: :integer }
+        }
+      }
+      let(:id) { goa.id }
+      let(:group_order_article) { { order_article_id: goa.order_article_id, quantity: 2, tolerance: 2 } }
+
+      response '200', 'success' do
+        schema type: :object, properties: {
+          group_order_article_for_create: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticleForUpdate'
+            }
+          }
+        }
+        run_test!
+      end
+      # 401
+      response 401, 'missing token' do
+        let(:Authorization) { 'abc' }
+        schema '$ref' => '#/components/schemas/Error401'
+        run_test!
+      end
+      # 403
+      response 403, 'missing scope' do
+        let(:api_scopes) { ['none'] }
+        schema '$ref' => '#/components/schemas/Error403'
+        run_test!
+      end
+      # 404
+      response '404', 'group order article not found' do
+        schema type: :object, properties: {
+          group_order_article: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+        let(:id) { 'invalid' }
+        run_test!
+      end
+
+      #422
+      response '422', 'invalid parameter value' do
+        let(:group_order_article) { { order_article_id: 'invalid', quantity: -5, tolerance: 'invalid' } }
+        schema '$ref' => '#/components/schemas/Error422'
+        run_test!
+      end
+    end
+
+    get 'find group order article by id' do
+      tags 'User', 'GroupOrderArticle'
+      produces 'application/json'
+      parameter name: :id, in: :path, type: :string
+
+      let(:id) { goa.id }
+      response '200', 'success' do
+        schema type: :object, properties: {
+          group_order_article: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+        run_test! do |response|
+          data = JSON.parse(response.body)
+          expect(data['group_order_article']['id']).to eq(goa.id)
+        end
+      end
+
+      # 401
+      response 401, 'missing token' do
+        let(:Authorization) { 'abc' }
+        schema '$ref' => '#/components/schemas/Error401'
+        run_test!
+      end
+      # 403
+      response 403, 'missing scope' do
+        let(:api_scopes) { ['none'] }
+        schema '$ref' => '#/components/schemas/Error403'
+        run_test!
+      end
+      # 404
+      response '404', 'group order article not found' do
+        schema type: :object, properties: {
+          group_order_article: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+        let(:id) { 'invalid' }
+        run_test!
+      end
+    end
+
+    delete 'remove group order article' do
+      tags 'User', 'Order'
+      consumes 'application/json'
+      produces 'application/json'
+      let(:api_scopes) { ['group_orders:user'] }
+
+      parameter name: :id, in: :path, type: :string
+
+      let(:id) { goa.id }
+      response '200', 'success' do
+        schema type: :object, properties: {
+          group_order_article: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+        run_test!
+      end
+
+      # 401
+      response 401, 'missing token' do
+        let(:Authorization) { 'abc' }
+        schema '$ref' => '#/components/schemas/Error401'
+        run_test!
+      end
+
+      # 403
+      response 403, 'missing scope' do
+        let(:api_scopes) { ['none'] }
+        schema '$ref' => '#/components/schemas/Error403'
+        run_test!
+      end
+
+      # 404
+      response '404', 'group order article not found' do
+        schema type: :object, properties: {
+          group_order_article: {
+            type: :object,
+            items: {
+              '$ref': '#/components/schemas/GroupOrderArticle'
+            }
+          }
+        }
+        let(:id) { 'invalid' }
+        run_test!
+      end
+    end
+  end
+end
diff --git a/spec/swagger_helper.rb b/spec/swagger_helper.rb
index 600f45fd..2d255a91 100644
--- a/spec/swagger_helper.rb
+++ b/spec/swagger_helper.rb
@@ -208,6 +208,54 @@ RSpec.configure do |config|
             },
             required: %w[id name financial_transaction_class]
           },
+          GroupOrderArticleForUpdate: {
+            type: :object,
+            properties: {
+              quantity:
+              {
+                type: :integer,
+                description: 'number of units ordered by the users ordergroup'
+              },
+              tolerance:
+              {
+                type: :integer,
+                description: 'number of extra units the users ordergroup is willing to buy for filling a box'
+              }
+            }
+          },
+          GroupOrderArticleForCreate: {
+            type: :object,
+            properties: {
+              order_article_id:
+              {
+                type: :integer,
+                description: 'id of order article'
+              }
+            }
+          },
+          GroupOrderArticle: {
+            type: :object,
+            properties: {
+              id: {
+                type: :integer
+              },
+              result: {
+                type: :float,
+                description: 'number of units the users ordergroup will receive or has received'
+              },
+              total_price:
+              {
+                type: :float,
+                description: 'total price of this group order article'
+              },
+              order_article_id:
+              {
+                type: :integer,
+                description: 'id of order article'
+              }
+            },
+            required: %w[order_article_id]
+          },
           Meta: {
             type: :object,
             properties: {
@@ -305,7 +353,7 @@ RSpec.configure do |config|
             properties: {
               error: {
                 type: :string,
-                description: 'unprocessable entity'
+                description: '<tt>unprocessable entity</tt>'
               },
               error_description: {
                 '$ref': '#/components/schemas/Error/properties/error_description'