Добавлен API вызов для получения активного Recaptcha public key

api/controllers/OptionsController.php

@@ -0,0 +1,30 @@
+<?php
+namespace api\controllers;
+
+use Yii;
+use yii\helpers\ArrayHelper;
+use yii\web\Response;
+
+class OptionsController extends Controller {
+
+    public function behaviors() {
+        return ArrayHelper::merge(parent::behaviors(), [
+            'authenticator' => [
+                'except' => ['recaptcha-public-key'],
+            ],
+        ]);
+    }
+
+    public function verbs() {
+        return [
+            'recaptcha-public-key' => ['GET'],
+        ];
+    }
+
+    public function actionRecaptchaPublicKey() {
+        Yii::$app->response->format = Response::FORMAT_RAW;
+
+        return Yii::$app->reCaptcha->public;
+    }
+
+}