diff --git a/mailpoet/assets/js/src/automation/editor/store/types.ts b/mailpoet/assets/js/src/automation/editor/store/types.ts
index 56c031bb02..f48ad3bad5 100644
--- a/mailpoet/assets/js/src/automation/editor/store/types.ts
+++ b/mailpoet/assets/js/src/automation/editor/store/types.ts
@@ -20,6 +20,27 @@ export type Registry = {
       };
     }
   >;
+  subjects: Record<
+    string,
+    {
+      key: string;
+      name: string;
+      args_schema: {
+        type: 'object';
+        properties?: Record<string, { type: string; default?: unknown }>;
+      };
+      field_keys: string[];
+    }
+  >;
+  fields: Record<
+    string,
+    {
+      key: string;
+      type: 'string' | 'enum_array';
+      name: string;
+      args: Record<string, unknown>;
+    }
+  >;
 };
 
 export type Context = Record<string, unknown>;
diff --git a/mailpoet/lib/AdminPages/Pages/AutomationEditor.php b/mailpoet/lib/AdminPages/Pages/AutomationEditor.php
index d8a8bf7e34..67d5643f4f 100644
--- a/mailpoet/lib/AdminPages/Pages/AutomationEditor.php
+++ b/mailpoet/lib/AdminPages/Pages/AutomationEditor.php
@@ -105,7 +105,34 @@ class AutomationEditor {
         'args_schema' => $step->getArgsSchema()->toArray(),
       ];
     }
-    return ['steps' => $steps];
+
+    $subjects = [];
+    foreach ($this->registry->getSubjects() as $key => $subject) {
+      $subjects[$key] = [
+        'key' => $subject->getKey(),
+        'name' => $subject->getName(),
+        'args_schema' => $subject->getArgsSchema()->toArray(),
+        'field_keys' => array_map(function ($field) {
+          return $field->getKey();
+        }, $subject->getFields()),
+      ];
+    }
+
+    $fields = [];
+    foreach ($this->registry->getFields() as $key => $field) {
+      $fields[$key] = [
+        'key' => $field->getKey(),
+        'type' => $field->getType(),
+        'name' => $field->getName(),
+        'args' => $field->getArgs(),
+      ];
+    }
+
+    return [
+      'steps' => $steps,
+      'subjects' => $subjects,
+      'fields' => $fields,
+    ];
   }
 
   private function buildContext(): array {