diff --git a/api/v3/TwingleSync/Sync.php b/api/v3/TwingleSync/Sync.php
index 72ccd31..df1afc8 100644
--- a/api/v3/TwingleSync/Sync.php
+++ b/api/v3/TwingleSync/Sync.php
@@ -28,20 +28,6 @@ function _civicrm_api3_twingle_sync_Sync_spec(array &$spec) {
     'api.required' => 0,
     'description'  => E::ts('Limit for the number of events that should get requested per call to the Twingle API'),
   ];
-  $spec['project_id'] = [
-    'name'         => 'project_id',
-    'title'        => E::ts('Twingle Project ID'),
-    'type'         => CRM_Utils_Type::T_INT,
-    'api.required' => 0,
-    'description'  => E::ts('Twingle ID for a project'),
-  ];
-  $spec['id'] = [
-    'name'         => 'id',
-    'title'        => E::ts('Campaign ID'),
-    'type'         => CRM_Utils_Type::T_INT,
-    'api.required' => 0,
-    'description'  => E::ts('Unique Campaign ID'),
-  ];
   $spec['is_test'] = [
     'name'         => 'is_test',
     'title'        => E::ts('Test'),
@@ -52,121 +38,44 @@ function _civicrm_api3_twingle_sync_Sync_spec(array &$spec) {
 }
 
 /**
- * TwingleSync.Sync API
+ * # TwingleSync.Sync API
+ * This API synchronizes all *TwingleProject* and *TwingleEvent* campaigns.
  *
  * @param array $params
  *
  * @return array
  *   API result descriptor
  *
- * @throws API_Exception|\CiviCRM_API3_Exception
- * @throws \Exception
+ * @throws CiviCRM_API3_Exception
  * @see civicrm_api3_create_success
- *
  */
-function civicrm_api3_twingle_sync_Sync($params) {
+function civicrm_api3_twingle_sync_Sync(array $params): array {
 
   $result_values = [];
-  $is_test = FALSE;
+  unset($params['sequential']);
 
-  // Is this call a test?
-  if ($params['is_test']) {
-    $is_test = $params['is_test'];
-  }
+  // Synchronize all TwingleProject campaigns
+  $projects = civicrm_api3(
+    'TwingleProject',
+    'sync',
+    $params
+  )['values'];
 
-  // If call provides an API key, use it instead of the API key set
-  // on the extension settings page
-  $apiKey = empty($params['twingle_api_key'])
-    ? trim(Civi::settings()->get('twingle_api_key'))
-    : trim($params['twingle_api_key']);
-  // If function call does not provide a limit, set a default value
-  $limit = ($params['limit']) ?? 20;
-
-  // Try to retrieve twingleApi from cache
-  $twingleApi = Civi::cache()->get('twinglecampaign_twingle_api');
-  if (NULL === $twingleApi || $params['twingle_api_key']) {
-    $twingleApi = new TwingleApiCall($apiKey, $limit);
-    Civi::cache('long')->set('twinglecampaign_twingle_api', $twingleApi);
-  }
-
-  if ($params['id'] && !$params['project_id']) {
-    // Get single TwingleProject
-    $projects_from_civicrm =
-      civicrm_api3('TwingleProject', 'getsingle',
-        ['id' => $params['id'], 'is_active' => 1])['values'];
-
-    // Get single project from Twingle
-    $projects_from_twingle[0] =
-      $projects_from_civicrm[$params['id']]['project_id']
-        ? $twingleApi->getProject($projects_from_civicrm[$params['id']]['project_id'])
-        : NULL;
-  }
-  else {
-    if ($params['project_id']) {
-      // Get single project from Twingle
-      $projects_from_twingle[0] = $twingleApi->getProject($params['project_id']);
-
-      // Get single TwingleProject
-      $projects_from_civicrm = civicrm_api3('TwingleProject', 'get',
-        ['is_active' => 1, 'project_id' => $params['project_id']]);
-    }
-    else {
-      // Get all projects from Twingle
-      $projects_from_twingle = $twingleApi->getProject();
-
-      // Get all TwingleProjects from CiviCRM
-      $projects_from_civicrm = civicrm_api3('TwingleProject', 'get',
-        ['is_active' => 1,])['values'];
-    }
-  }
-
-  $i = 0;
-
-  // Push missing projects to Twingle
-  foreach ($projects_from_civicrm as $project_from_civicrm) {
-    if (!in_array($project_from_civicrm['project_id'],
-      array_column($projects_from_twingle, 'id'))) {
-      // store campaign id in $id
-      $id = $project_from_civicrm['id'];
-      unset($project_from_civicrm['id']);
-      // instantiate project with values from TwingleProject.Get
-      $project = new TwingleProject($project_from_civicrm, $id);
-      // push project to Twingle
-      $result = $twingleApi->pushProject($project);
-      // update local campaign with data coming back from Twingle
-      $project->update($result);
-      $project_create = $project->create();
-      // set status
-      $project_create['status'] =
-        $project_create['status'] == 'TwingleProject created'
-          ? 'TwingleProject pushed to Twingle'
-          : 'TwingleProject got likely pushed to Twingle but local update failed';
-      $result_values['sync']['projects'][$i++] = $project_create;
-    }
-  }
-
-  // Sync existing projects
-  foreach ($projects_from_twingle as $project) {
+  // Synchronize all TwingleEvent campaigns
+  foreach ($projects as $project) {
     if (is_array($project)) {
-      $result_values['sync']['projects'][$i++] =
-        TwingleProject::sync($project, $twingleApi, $is_test);
-    }
-  }
-
-  // Get all events from projects of type "event" and create them as campaigns
-  // if they do not exist yet
-  $j = 0;
-  foreach ($result_values['sync']['projects'] as $project) {
-    if ($project['project_type'] == 'event') {
-      $events = $twingleApi->getEvent($project['project_id']);
-      if (is_array($events)) {
-        foreach ($events as $event) {
-          if ($event) {
-            $result_values['sync']['events'][$j++] =
-              TwingleEvent::sync($event, $twingleApi, $is_test);
-          }
-        }
-      }
+      $_params = $params;
+      $_params['project_id'] = $project['project_id'];
+      $result_values[] = [
+        'project' => $project,
+        'events'  => array_values(
+          civicrm_api3(
+            'TwingleEvent',
+            'sync',
+            $_params
+          )['values']
+        ),
+      ];
     }
   }