diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 44b737d7a696666f3efbfc090ebb13212a30c35f..1814469f6ce5798e09318e0b9477b2f9024931ed 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -290,6 +290,10 @@ module Ci
       end
     end
 
+    def has_yaml_errors?
+      yaml_errors.present?
+    end
+
     def environments
       builds.where.not(environment: nil).success.pluck(:environment).uniq
     end
diff --git a/app/serializers/pipeline_entity.rb b/app/serializers/pipeline_entity.rb
index 3ede0fb0f539129a59be5f96780b9ce297c801e0..422054764786679f9b7950b03035c7b536628984 100644
--- a/app/serializers/pipeline_entity.rb
+++ b/app/serializers/pipeline_entity.rb
@@ -28,12 +28,10 @@ class PipelineEntity < Grape::Entity
   expose :flags do
     expose :latest?, as: :latest
     expose :triggered?, as: :triggered
-
-    expose :yaml_errors?, as: :yaml_errors do |pipeline|
-      pipeline.yaml_errors.present?
-    end
-
     expose :stuck?, as: :stuck
+    expose :has_yaml_errors?, as: :yaml_errors
+    expose :can_retry?, as: :retryable
+    expose :can_cancel?, as: :cancelable
   end
 
   expose :ref do
@@ -41,31 +39,45 @@ class PipelineEntity < Grape::Entity
       pipeline.ref
     end
 
-    expose :url do |pipeline|
-      namespace_project_tree_url(
+    expose :path do |pipeline|
+      namespace_project_tree_path(
         pipeline.project.namespace,
         pipeline.project,
         id: pipeline.ref)
     end
 
-    expose :tag?
+    expose :tag?, as: :tag
+    expose :branch?, as: :branch
   end
 
   expose :commit, using: CommitEntity
+  expose :yaml_errors, if: ->(pipeline, _) { pipeline.has_yaml_errors? }
 
-  expose :retry_url do |pipeline|
-    can?(request.user, :update_pipeline, pipeline.project) &&
-      pipeline.retryable? &&
-      retry_namespace_project_pipeline_path(pipeline.project.namespace,
-                                            pipeline.project, pipeline.id)
+  expose :retry_path, if: proc { can_retry? }  do |pipeline|
+    retry_namespace_project_pipeline_path(pipeline.project.namespace,
+                                          pipeline.project,
+                                          pipeline.id)
   end
 
-  expose :cancel_url do |pipeline|
-    can?(request.user, :update_pipeline, pipeline.project) &&
-      pipeline.cancelable? &&
-      cancel_namespace_project_pipeline_path(pipeline.project.namespace,
-                                             pipeline.project, pipeline.id)
+  expose :cancel_path, if: proc { can_cancel? } do |pipeline|
+    cancel_namespace_project_pipeline_path(pipeline.project.namespace,
+                                           pipeline.project,
+                                           pipeline.id)
   end
 
   expose :created_at, :updated_at
+
+  private
+
+  alias_method :pipeline, :object
+
+  def can_retry?
+    pipeline.retryable? &&
+      can?(request.user, :update_pipeline, pipeline)
+  end
+
+  def can_cancel?
+    pipeline.cancelable? &&
+      can?(request.user, :update_pipeline, pipeline)
+  end
 end
diff --git a/app/serializers/pipeline_serializer.rb b/app/serializers/pipeline_serializer.rb
index c4ca5c40dbaf999ab0846304f44dc4929ab9ccb9..76c767f82c0473186d8be28be7edebf2a3de3db3 100644
--- a/app/serializers/pipeline_serializer.rb
+++ b/app/serializers/pipeline_serializer.rb
@@ -3,14 +3,6 @@ class PipelineSerializer < BaseSerializer
   include API::Helpers::Pagination
   Struct.new('Pagination', :request, :response)
 
-  def with_pagination(request, response)
-    tap { @pagination = Struct::Pagination.new(request, response) }
-  end
-
-  def paginate?
-    defined?(@pagination)
-  end
-
   def represent(resource, opts = {})
     if paginate?
       super(paginate(resource), opts)
@@ -19,6 +11,14 @@ class PipelineSerializer < BaseSerializer
     end
   end
 
+  def paginate?
+    defined?(@pagination)
+  end
+
+  def with_pagination(request, response)
+    tap { @pagination = Struct::Pagination.new(request, response) }
+  end
+
   private
 
   # Methods needed by `API::Helpers::Pagination`
diff --git a/spec/factories/ci/pipelines.rb b/spec/factories/ci/pipelines.rb
index 1735791f6441bcbde223610b1ddb41979c36fc99..6ed4f547d046485ffa27bf63f921636ce6cbcb02 100644
--- a/spec/factories/ci/pipelines.rb
+++ b/spec/factories/ci/pipelines.rb
@@ -31,6 +31,10 @@ FactoryGirl.define do
             File.read(Rails.root.join('spec/support/gitlab_stubs/gitlab_ci.yml'))
           end
         end
+
+        # Populates pipeline with errors
+        #
+        pipeline.config_processor if evaluator.config
       end
     end
   end
diff --git a/spec/serializers/pipeline_entity_spec.rb b/spec/serializers/pipeline_entity_spec.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b19464c7117aefd2390f7cd4b69698b83fef3725
--- /dev/null
+++ b/spec/serializers/pipeline_entity_spec.rb
@@ -0,0 +1,138 @@
+require 'spec_helper'
+
+describe PipelineEntity do
+  let(:user) { create(:user) }
+  let(:request) { double('request') }
+
+  before do
+    allow(request).to receive(:user).and_return(user)
+  end
+
+  let(:entity) do
+    described_class.represent(pipeline, request: request)
+  end
+
+  describe '#as_json' do
+    subject { entity.as_json }
+
+    context 'when pipeline is empty' do
+      let(:pipeline) { create(:ci_empty_pipeline) }
+
+      it 'contains required fields' do
+        expect(subject).to include :id, :user, :path
+        expect(subject).to include :ref, :commit
+        expect(subject).to include :updated_at, :created_at
+      end
+
+      it 'contains details' do
+        expect(subject).to include :details
+        expect(subject[:details])
+          .to include :duration, :finished_at
+        expect(subject[:details])
+          .to include :stages, :artifacts, :manual_actions
+        expect(subject[:details][:status]).to include :icon, :text, :label
+      end
+
+      it 'contains flags' do
+        expect(subject).to include :flags
+        expect(subject[:flags])
+          .to include :latest, :triggered, :stuck,
+                      :yaml_errors, :retryable, :cancelable
+      end
+    end
+
+    context 'when pipeline is retryable' do
+      let(:project) { create(:empty_project) }
+
+      let(:pipeline) do
+        create(:ci_pipeline, status: :success, project: project)
+      end
+
+      before do
+        create(:ci_build, :failed, pipeline: pipeline)
+      end
+
+      context 'user has ability to retry pipeline' do
+        before { project.team << [user, :developer] }
+
+        it 'retryable flag is true' do
+          expect(subject[:flags][:retryable]).to eq true
+        end
+
+        it 'contains retry path' do
+          expect(subject[:retry_path]).to be_present
+        end
+      end
+
+      context 'user does not have ability to retry pipeline' do
+        it 'retryable flag is false' do
+          expect(subject[:flags][:retryable]).to eq false
+        end
+
+        it 'does not contain retry path' do
+          expect(subject).not_to have_key(:retry_path)
+        end
+      end
+    end
+
+    context 'when pipeline is cancelable' do
+      let(:project) { create(:empty_project) }
+
+      let(:pipeline) do
+        create(:ci_pipeline, status: :running, project: project)
+      end
+
+      before do
+        create(:ci_build, :pending, pipeline: pipeline)
+      end
+
+      context 'user has ability to cancel pipeline' do
+        before { project.team << [user, :developer] }
+
+        it 'cancelable flag is true' do
+          expect(subject[:flags][:cancelable]).to eq true
+        end
+
+        it 'contains cancel path' do
+          expect(subject[:cancel_path]).to be_present
+        end
+      end
+
+      context 'user does not have ability to cancel pipeline' do
+        it 'cancelable flag is false' do
+          expect(subject[:flags][:cancelable]).to eq false
+        end
+
+        it 'does not contain cancel path' do
+          expect(subject).not_to have_key(:cancel_path)
+        end
+      end
+    end
+
+    context 'when pipeline has YAML errors' do
+      let(:pipeline) do
+        create(:ci_pipeline, config: { rspec: { invalid: :value } })
+      end
+
+      it 'contains flag that indicates there are errors' do
+        expect(subject[:flags][:yaml_errors]).to be true
+      end
+
+      it 'contains information about error' do
+        expect(subject[:yaml_errors]).to be_present
+      end
+    end
+
+    context 'when pipeline does not have YAML errors' do
+      let(:pipeline) { create(:ci_empty_pipeline) }
+
+      it 'contains flag that indicates there are no errors' do
+        expect(subject[:flags][:yaml_errors]).to be false
+      end
+
+      it 'does not contain field that normally holds an error' do
+        expect(subject).not_to have_key(:yaml_errors)
+      end
+    end
+  end
+end