diff --git a/app/helpers/services_helper.rb b/app/helpers/services_helper.rb
index 9bab140e60a..715e5893a2c 100644
--- a/app/helpers/services_helper.rb
+++ b/app/helpers/services_helper.rb
@@ -1,23 +1,23 @@
 module ServicesHelper
   def service_event_description(event)
     case event
-    when "push"
+    when "push", "push_events"
       "Event will be triggered by a push to the repository"
-    when "tag_push"
+    when "tag_push", "tag_push_events"
       "Event will be triggered when a new tag is pushed to the repository"
-    when "note"
+    when "note", "note_events"
       "Event will be triggered when someone adds a comment"
-    when "issue"
+    when "issue", "issue_events"
       "Event will be triggered when an issue is created/updated/closed"
-    when "confidential_issue"
+    when "confidential_issue", "confidential_issue_events"
       "Event will be triggered when a confidential issue is created/updated/closed"
-    when "merge_request"
+    when "merge_request", "merge_request_events"
       "Event will be triggered when a merge request is created/updated/merged"
-    when "build"
+    when "build", "build_events"
       "Event will be triggered when a build status changes"
-    when "wiki_page"
+    when "wiki_page", "wiki_page_events"
       "Event will be triggered when a wiki page is created/updated"
-    when "commit"
+    when "commit", "commit_events"
       "Event will be triggered when a commit is created/updated"
     end
   end
@@ -26,4 +26,6 @@ module ServicesHelper
     event = event.pluralize if %w[merge_request issue confidential_issue].include?(event)
     "#{event}_events"
   end
+
+  extend self
 end
diff --git a/app/models/project_services/asana_service.rb b/app/models/project_services/asana_service.rb
index 7c23b766763..3728f5642e4 100644
--- a/app/models/project_services/asana_service.rb
+++ b/app/models/project_services/asana_service.rb
@@ -25,7 +25,7 @@ You can create a Personal Access Token here:
 http://app.asana.com/-/account_api'
   end
 
-  def to_param
+  def self.to_param
     'asana'
   end
 
@@ -44,7 +44,7 @@ http://app.asana.com/-/account_api'
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/assembla_service.rb b/app/models/project_services/assembla_service.rb
index d839221d315..aeeff8917bf 100644
--- a/app/models/project_services/assembla_service.rb
+++ b/app/models/project_services/assembla_service.rb
@@ -12,7 +12,7 @@ class AssemblaService < Service
     'Project Management Software (Source Commits Endpoint)'
   end
 
-  def to_param
+  def self.to_param
     'assembla'
   end
 
@@ -23,7 +23,7 @@ class AssemblaService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/bamboo_service.rb b/app/models/project_services/bamboo_service.rb
index 4819bdbef8c..400020ee04a 100644
--- a/app/models/project_services/bamboo_service.rb
+++ b/app/models/project_services/bamboo_service.rb
@@ -40,7 +40,7 @@ class BambooService < CiService
     'You must set up automatic revision labeling and a repository trigger in Bamboo.'
   end
 
-  def to_param
+  def self.to_param
     'bamboo'
   end
 
@@ -56,10 +56,6 @@ class BambooService < CiService
     ]
   end
 
-  def supported_events
-    %w(push)
-  end
-
   def build_page(sha, ref)
     with_reactive_cache(sha, ref) {|cached| cached[:build_page] }
   end
diff --git a/app/models/project_services/bugzilla_service.rb b/app/models/project_services/bugzilla_service.rb
index 338e685339a..046e2809f45 100644
--- a/app/models/project_services/bugzilla_service.rb
+++ b/app/models/project_services/bugzilla_service.rb
@@ -19,7 +19,7 @@ class BugzillaService < IssueTrackerService
     end
   end
 
-  def to_param
+  def self.to_param
     'bugzilla'
   end
 end
diff --git a/app/models/project_services/buildkite_service.rb b/app/models/project_services/buildkite_service.rb
index e77942d8f3c..0956c4a4ede 100644
--- a/app/models/project_services/buildkite_service.rb
+++ b/app/models/project_services/buildkite_service.rb
@@ -24,10 +24,6 @@ class BuildkiteService < CiService
     hook.save
   end
 
-  def supported_events
-    %w(push)
-  end
-
   def execute(data)
     return unless supported_events.include?(data[:object_kind])
 
@@ -54,7 +50,7 @@ class BuildkiteService < CiService
     'Continuous integration and deployments'
   end
 
-  def to_param
+  def self.to_param
     'buildkite'
   end
 
diff --git a/app/models/project_services/builds_email_service.rb b/app/models/project_services/builds_email_service.rb
index 201b94b065b..ebd21e37189 100644
--- a/app/models/project_services/builds_email_service.rb
+++ b/app/models/project_services/builds_email_service.rb
@@ -19,11 +19,11 @@ class BuildsEmailService < Service
     'Email the builds status to a list of recipients.'
   end
 
-  def to_param
+  def self.to_param
     'builds_email'
   end
 
-  def supported_events
+  def self.supported_events
     %w(build)
   end
 
diff --git a/app/models/project_services/campfire_service.rb b/app/models/project_services/campfire_service.rb
index 5af93860d09..0de59af5652 100644
--- a/app/models/project_services/campfire_service.rb
+++ b/app/models/project_services/campfire_service.rb
@@ -12,7 +12,7 @@ class CampfireService < Service
     'Simple web-based real-time group chat'
   end
 
-  def to_param
+  def self.to_param
     'campfire'
   end
 
@@ -24,7 +24,7 @@ class CampfireService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/chat_notification_service.rb b/app/models/project_services/chat_notification_service.rb
index 3098625b0c2..8468934425f 100644
--- a/app/models/project_services/chat_notification_service.rb
+++ b/app/models/project_services/chat_notification_service.rb
@@ -25,7 +25,7 @@ class ChatNotificationService < Service
     valid?
   end
 
-  def supported_events
+  def self.supported_events
     %w[push issue confidential_issue merge_request note tag_push
        build pipeline wiki_page]
   end
diff --git a/app/models/project_services/chat_slash_commands_service.rb b/app/models/project_services/chat_slash_commands_service.rb
index 0bc160af604..2bcff541cc0 100644
--- a/app/models/project_services/chat_slash_commands_service.rb
+++ b/app/models/project_services/chat_slash_commands_service.rb
@@ -13,8 +13,8 @@ class ChatSlashCommandsService < Service
       ActiveSupport::SecurityUtils.variable_size_secure_compare(token, self.token)
   end
 
-  def supported_events
-    []
+  def self.supported_events
+    %w()
   end
 
   def can_test?
diff --git a/app/models/project_services/ci_service.rb b/app/models/project_services/ci_service.rb
index 4de0106707e..82979c8bd34 100644
--- a/app/models/project_services/ci_service.rb
+++ b/app/models/project_services/ci_service.rb
@@ -8,7 +8,7 @@ class CiService < Service
     self.respond_to?(:token) && self.token.present? && ActiveSupport::SecurityUtils.variable_size_secure_compare(token, self.token)
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/custom_issue_tracker_service.rb b/app/models/project_services/custom_issue_tracker_service.rb
index b2f426dc2ac..dea915a4d05 100644
--- a/app/models/project_services/custom_issue_tracker_service.rb
+++ b/app/models/project_services/custom_issue_tracker_service.rb
@@ -23,7 +23,7 @@ class CustomIssueTrackerService < IssueTrackerService
     end
   end
 
-  def to_param
+  def self.to_param
     'custom_issue_tracker'
   end
 
diff --git a/app/models/project_services/deployment_service.rb b/app/models/project_services/deployment_service.rb
index ab353a1abe6..91a55514a9a 100644
--- a/app/models/project_services/deployment_service.rb
+++ b/app/models/project_services/deployment_service.rb
@@ -5,8 +5,8 @@
 class DeploymentService < Service
   default_value_for :category, 'deployment'
 
-  def supported_events
-    []
+  def self.supported_events
+    %w()
   end
 
   def predefined_variables
diff --git a/app/models/project_services/drone_ci_service.rb b/app/models/project_services/drone_ci_service.rb
index 4bbbebf54cb..0a217d8caba 100644
--- a/app/models/project_services/drone_ci_service.rb
+++ b/app/models/project_services/drone_ci_service.rb
@@ -32,7 +32,7 @@ class DroneCiService < CiService
     true
   end
 
-  def supported_events
+  def self.supported_events
     %w(push merge_request tag_push)
   end
 
@@ -87,7 +87,7 @@ class DroneCiService < CiService
     'Drone is a Continuous Integration platform built on Docker, written in Go'
   end
 
-  def to_param
+  def self.to_param
     'drone_ci'
   end
 
diff --git a/app/models/project_services/emails_on_push_service.rb b/app/models/project_services/emails_on_push_service.rb
index 79285cbd26d..f4f913ee0b6 100644
--- a/app/models/project_services/emails_on_push_service.rb
+++ b/app/models/project_services/emails_on_push_service.rb
@@ -12,11 +12,11 @@ class EmailsOnPushService < Service
     'Email the commits and diff of each push to a list of recipients.'
   end
 
-  def to_param
+  def self.to_param
     'emails_on_push'
   end
 
-  def supported_events
+  def self.supported_events
     %w(push tag_push)
   end
 
diff --git a/app/models/project_services/external_wiki_service.rb b/app/models/project_services/external_wiki_service.rb
index d7b6e505191..bdf6fa6a586 100644
--- a/app/models/project_services/external_wiki_service.rb
+++ b/app/models/project_services/external_wiki_service.rb
@@ -13,7 +13,7 @@ class ExternalWikiService < Service
     'Replaces the link to the internal wiki with a link to an external wiki.'
   end
 
-  def to_param
+  def self.to_param
     'external_wiki'
   end
 
@@ -29,4 +29,8 @@ class ExternalWikiService < Service
       nil
     end
   end
+
+  def self.supported_events
+    %w()
+  end
 end
diff --git a/app/models/project_services/flowdock_service.rb b/app/models/project_services/flowdock_service.rb
index dd00275187f..10a13c3fbdc 100644
--- a/app/models/project_services/flowdock_service.rb
+++ b/app/models/project_services/flowdock_service.rb
@@ -12,7 +12,7 @@ class FlowdockService < Service
     'Flowdock is a collaboration web app for technical teams.'
   end
 
-  def to_param
+  def self.to_param
     'flowdock'
   end
 
@@ -22,7 +22,7 @@ class FlowdockService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/gemnasium_service.rb b/app/models/project_services/gemnasium_service.rb
index 598aca5e06d..f271e1f1739 100644
--- a/app/models/project_services/gemnasium_service.rb
+++ b/app/models/project_services/gemnasium_service.rb
@@ -12,7 +12,7 @@ class GemnasiumService < Service
     'Gemnasium monitors your project dependencies and alerts you about updates and security vulnerabilities.'
   end
 
-  def to_param
+  def self.to_param
     'gemnasium'
   end
 
@@ -23,7 +23,7 @@ class GemnasiumService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/gitlab_issue_tracker_service.rb b/app/models/project_services/gitlab_issue_tracker_service.rb
index 6bd8d4ec568..ad4eb9536e1 100644
--- a/app/models/project_services/gitlab_issue_tracker_service.rb
+++ b/app/models/project_services/gitlab_issue_tracker_service.rb
@@ -7,7 +7,7 @@ class GitlabIssueTrackerService < IssueTrackerService
 
   default_value_for :default, true
 
-  def to_param
+  def self.to_param
     'gitlab'
   end
 
diff --git a/app/models/project_services/hipchat_service.rb b/app/models/project_services/hipchat_service.rb
index 915f6fed74c..72da219df28 100644
--- a/app/models/project_services/hipchat_service.rb
+++ b/app/models/project_services/hipchat_service.rb
@@ -27,7 +27,7 @@ class HipchatService < Service
     'Private group chat and IM'
   end
 
-  def to_param
+  def self.to_param
     'hipchat'
   end
 
@@ -45,7 +45,7 @@ class HipchatService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push issue confidential_issue merge_request note tag_push build)
   end
 
diff --git a/app/models/project_services/irker_service.rb b/app/models/project_services/irker_service.rb
index 7355918feab..5d93064f9b3 100644
--- a/app/models/project_services/irker_service.rb
+++ b/app/models/project_services/irker_service.rb
@@ -17,11 +17,11 @@ class IrkerService < Service
     'gateway.'
   end
 
-  def to_param
+  def self.to_param
     'irker'
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/issue_tracker_service.rb b/app/models/project_services/issue_tracker_service.rb
index bce2cdd5516..9e65fdbf9d6 100644
--- a/app/models/project_services/issue_tracker_service.rb
+++ b/app/models/project_services/issue_tracker_service.rb
@@ -57,7 +57,7 @@ class IssueTrackerService < Service
     end
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/jira_service.rb b/app/models/project_services/jira_service.rb
index 2d969d2fcb6..2ac76e97de0 100644
--- a/app/models/project_services/jira_service.rb
+++ b/app/models/project_services/jira_service.rb
@@ -12,7 +12,7 @@ class JiraService < IssueTrackerService
   # This is confusing, but JiraService does not really support these events.
   # The values here are required to display correct options in the service
   # configuration screen.
-  def supported_events
+  def self.supported_events
     %w(commit merge_request)
   end
 
@@ -81,7 +81,7 @@ class JiraService < IssueTrackerService
     end
   end
 
-  def to_param
+  def self.to_param
     'jira'
   end
 
diff --git a/app/models/project_services/kubernetes_service.rb b/app/models/project_services/kubernetes_service.rb
index 085125ca9dc..fa3cedc4354 100644
--- a/app/models/project_services/kubernetes_service.rb
+++ b/app/models/project_services/kubernetes_service.rb
@@ -52,7 +52,7 @@ class KubernetesService < DeploymentService
     'deployments with `app=$CI_ENVIRONMENT_SLUG`'
   end
 
-  def to_param
+  def self.to_param
     'kubernetes'
   end
 
diff --git a/app/models/project_services/mattermost_service.rb b/app/models/project_services/mattermost_service.rb
index 2bea3827b95..4ebc5318da1 100644
--- a/app/models/project_services/mattermost_service.rb
+++ b/app/models/project_services/mattermost_service.rb
@@ -7,7 +7,7 @@ class MattermostService < ChatNotificationService
     'Receive event notifications in Mattermost'
   end
 
-  def to_param
+  def self.to_param
     'mattermost'
   end
 
diff --git a/app/models/project_services/mattermost_slash_commands_service.rb b/app/models/project_services/mattermost_slash_commands_service.rb
index 2cb481182d7..50a011db74e 100644
--- a/app/models/project_services/mattermost_slash_commands_service.rb
+++ b/app/models/project_services/mattermost_slash_commands_service.rb
@@ -15,7 +15,7 @@ class MattermostSlashCommandsService < ChatSlashCommandsService
     "Perform common operations on GitLab in Mattermost"
   end
 
-  def to_param
+  def self.to_param
     'mattermost_slash_commands'
   end
 
diff --git a/app/models/project_services/pipelines_email_service.rb b/app/models/project_services/pipelines_email_service.rb
index 745f9bd1b43..ac617f409d9 100644
--- a/app/models/project_services/pipelines_email_service.rb
+++ b/app/models/project_services/pipelines_email_service.rb
@@ -15,11 +15,11 @@ class PipelinesEmailService < Service
     'Email the pipelines status to a list of recipients.'
   end
 
-  def to_param
+  def self.to_param
     'pipelines_email'
   end
 
-  def supported_events
+  def self.supported_events
     %w[pipeline]
   end
 
diff --git a/app/models/project_services/pivotaltracker_service.rb b/app/models/project_services/pivotaltracker_service.rb
index 5301f9fa0ff..9cc642591f4 100644
--- a/app/models/project_services/pivotaltracker_service.rb
+++ b/app/models/project_services/pivotaltracker_service.rb
@@ -14,7 +14,7 @@ class PivotaltrackerService < Service
     'Project Management Software (Source Commits Endpoint)'
   end
 
-  def to_param
+  def self.to_param
     'pivotaltracker'
   end
 
@@ -34,7 +34,7 @@ class PivotaltrackerService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/pushover_service.rb b/app/models/project_services/pushover_service.rb
index 3dd878e4c7d..a963d27a376 100644
--- a/app/models/project_services/pushover_service.rb
+++ b/app/models/project_services/pushover_service.rb
@@ -13,7 +13,7 @@ class PushoverService < Service
     'Pushover makes it easy to get real-time notifications on your Android device, iPhone, iPad, and Desktop.'
   end
 
-  def to_param
+  def self.to_param
     'pushover'
   end
 
@@ -61,7 +61,7 @@ class PushoverService < Service
     ]
   end
 
-  def supported_events
+  def self.supported_events
     %w(push)
   end
 
diff --git a/app/models/project_services/redmine_service.rb b/app/models/project_services/redmine_service.rb
index f9da273cf08..6acf611eba5 100644
--- a/app/models/project_services/redmine_service.rb
+++ b/app/models/project_services/redmine_service.rb
@@ -19,7 +19,7 @@ class RedmineService < IssueTrackerService
     end
   end
 
-  def to_param
+  def self.to_param
     'redmine'
   end
 end
diff --git a/app/models/project_services/slack_service.rb b/app/models/project_services/slack_service.rb
index 76d233a3cca..f77d2d7c60b 100644
--- a/app/models/project_services/slack_service.rb
+++ b/app/models/project_services/slack_service.rb
@@ -7,7 +7,7 @@ class SlackService < ChatNotificationService
     'Receive event notifications in Slack'
   end
 
-  def to_param
+  def self.to_param
     'slack'
   end
 
diff --git a/app/models/project_services/slack_slash_commands_service.rb b/app/models/project_services/slack_slash_commands_service.rb
index 5a7cc0fb329..c34991e4262 100644
--- a/app/models/project_services/slack_slash_commands_service.rb
+++ b/app/models/project_services/slack_slash_commands_service.rb
@@ -9,7 +9,7 @@ class SlackSlashCommandsService < ChatSlashCommandsService
     "Perform common operations on GitLab in Slack"
   end
 
-  def to_param
+  def self.to_param
     'slack_slash_commands'
   end
 
diff --git a/app/models/project_services/teamcity_service.rb b/app/models/project_services/teamcity_service.rb
index 6726082048f..cbaffb8ce48 100644
--- a/app/models/project_services/teamcity_service.rb
+++ b/app/models/project_services/teamcity_service.rb
@@ -43,14 +43,10 @@ class TeamcityService < CiService
     'requests build, that setting is in the vsc root advanced settings.'
   end
 
-  def to_param
+  def self.to_param
     'teamcity'
   end
 
-  def supported_events
-    %w(push)
-  end
-
   def fields
     [
       { type: 'text', name: 'teamcity_url',
diff --git a/app/models/service.rb b/app/models/service.rb
index 19ef3ba9c23..043be222f3a 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -76,6 +76,11 @@ class Service < ActiveRecord::Base
 
   def to_param
     # implement inside child
+    self.class.to_param
+  end
+
+  def self.to_param
+    raise NotImplementedError
   end
 
   def fields
@@ -92,7 +97,11 @@ class Service < ActiveRecord::Base
   end
 
   def event_names
-    supported_events.map { |event| "#{event}_events" }
+    self.class.event_names
+  end
+
+  def self.event_names
+    self.supported_events.map { |event| "#{event}_events" }
   end
 
   def event_field(event)
@@ -104,6 +113,10 @@ class Service < ActiveRecord::Base
   end
 
   def supported_events
+    self.class.supported_events
+  end
+
+  def self.supported_events
     %w(push tag_push issue confidential_issue merge_request wiki_page)
   end
 
diff --git a/changelogs/unreleased/22974-trigger-service-events-through-api.yml b/changelogs/unreleased/22974-trigger-service-events-through-api.yml
new file mode 100644
index 00000000000..57106e8c676
--- /dev/null
+++ b/changelogs/unreleased/22974-trigger-service-events-through-api.yml
@@ -0,0 +1,4 @@
+---
+title: Adds service trigger events to api
+merge_request: 8324
+author:
diff --git a/lib/api/services.rb b/lib/api/services.rb
index 3a9dfbb237c..a0abec49438 100644
--- a/lib/api/services.rb
+++ b/lib/api/services.rb
@@ -145,7 +145,7 @@ module API
           name: :room,
           type: String,
           desc: 'Campfire room'
-        },
+        }
       ],
       'custom-issue-tracker' => [
         {
@@ -534,7 +534,36 @@ module API
           desc: 'The password of the user'
         }
       ]
-    }.freeze
+    }
+
+    service_classes = [
+      AsanaService,
+      AssemblaService,
+      BambooService,
+      BugzillaService,
+      BuildkiteService,
+      BuildsEmailService,
+      CampfireService,
+      CustomIssueTrackerService,
+      DroneCiService,
+      EmailsOnPushService,
+      ExternalWikiService,
+      FlowdockService,
+      GemnasiumService,
+      HipchatService,
+      IrkerService,
+      JiraService,
+      KubernetesService,
+      MattermostSlashCommandsService,
+      SlackSlashCommandsService,
+      PipelinesEmailService,
+      PivotaltrackerService,
+      PushoverService,
+      RedmineService,
+      SlackService,
+      MattermostService,
+      TeamcityService,
+    ].freeze
 
     trigger_services = {
       'mattermost-slash-commands' => [
@@ -568,6 +597,19 @@ module API
       services.each do |service_slug, settings|
         desc "Set #{service_slug} service for project"
         params do
+          service_classes.each do |service|
+            event_names = service.try(:event_names) || []
+            event_names.each do |event_name|
+              services[service.to_param.tr("_", "-")] << {
+                required: false,
+                name: event_name.to_sym,
+                type: String,
+                desc: ServicesHelper.service_event_description(event_name)
+              }
+            end
+          end
+          services.freeze
+
           settings.each do |setting|
             if setting[:required]
               requires setting[:name], type: setting[:type], desc: setting[:desc]
@@ -581,7 +623,7 @@ module API
           service_params = declared_params(include_missing: false).merge(active: true)
 
           if service.update_attributes(service_params)
-            true
+            present service, with: Entities::ProjectService, include_passwords: current_user.is_admin?
           else
             render_api_error!('400 Bad Request', 400)
           end
diff --git a/spec/controllers/projects/services_controller_spec.rb b/spec/controllers/projects/services_controller_spec.rb
index 2e44b5128b4..a6e708c01e4 100644
--- a/spec/controllers/projects/services_controller_spec.rb
+++ b/spec/controllers/projects/services_controller_spec.rb
@@ -54,6 +54,7 @@ describe Projects::ServicesController do
     context 'on successful update' do
       it 'sets the flash' do
         expect(service).to receive(:to_param).and_return('hipchat')
+        expect(service).to receive(:event_names).and_return(HipchatService.event_names)
 
         put :update,
           namespace_id: project.namespace.id,
diff --git a/spec/requests/api/services_spec.rb b/spec/requests/api/services_spec.rb
index 39c9e0505d1..776dc655650 100644
--- a/spec/requests/api/services_spec.rb
+++ b/spec/requests/api/services_spec.rb
@@ -6,7 +6,7 @@ describe API::Services, api: true  do
   let(:user) { create(:user) }
   let(:admin) { create(:admin) }
   let(:user2) { create(:user) }
-  let(:project) {create(:empty_project, creator_id: user.id, namespace: user.namespace) }
+  let(:project) { create(:empty_project, creator_id: user.id, namespace: user.namespace) }
 
   Service.available_services_names.each do |service|
     describe "PUT /projects/:id/services/#{service.dasherize}" do
@@ -16,6 +16,15 @@ describe API::Services, api: true  do
         put api("/projects/#{project.id}/services/#{dashed_service}", user), service_attrs
 
         expect(response).to have_http_status(200)
+
+        current_service = project.services.first
+        event = current_service.event_names.empty? ? "foo" : current_service.event_names.first
+        state = current_service[event] || false
+
+        put api("/projects/#{project.id}/services/#{dashed_service}?#{event}=#{!state}", user), service_attrs
+
+        expect(response).to have_http_status(200)
+        expect(project.services.first[event]).not_to eq(state) unless event == "foo"
       end
 
       it "returns if required fields missing" do