diff --git a/.gitignore b/.gitignore
index 485dee6..ecbdba1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 .idea
+/composer.lock
+/tests/.phpunit.result.cache
+/vendor/
diff --git a/Api/Api.php b/Api/Api.php
new file mode 100644
index 0000000..4ab314b
--- /dev/null
+++ b/Api/Api.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Cleantalk\Common\BotDetectorService\Api;
+
+use Cleantalk\Common\BotDetectorService\BotDetectorService;
+
+class Api extends \Cleantalk\Common\Api\Api
+{
+    const METHOD_NAME = "get_bot_detector_wrapper_url";
+
+    public static function methodGetBotDetectorWrapperUrl($api_key)
+    {
+        return false;
+
+        /*$request = array(
+            'method_name' => self::METHOD_NAME,
+            'auth_key'    => $api_key,
+        );
+
+        return self::sendRequest($request);*/
+    }
+}
diff --git a/BotDetectorService.php b/BotDetectorService.php
new file mode 100644
index 0000000..fd41282
--- /dev/null
+++ b/BotDetectorService.php
@@ -0,0 +1,131 @@
+<?php
+
+namespace Cleantalk\Common\BotDetectorService;
+
+use Cleantalk\Common\BotDetectorService\Api\Api;
+use Cleantalk\Common\Mloader\Mloader;
+use Cleantalk\Common\Templates\Singleton;
+
+abstract class BotDetectorService
+{
+    use Singleton;
+
+    const BD_DEFAULT_DOMAIN = "fd.cleantalk.org";
+
+    const BD_DEFAULT_SCRIPT_NAME = "ct-bot-detector-wrapper.js";
+
+    const CALL_PERIOD = 3600;
+
+    const OPTION_NAME = "bot_detector_wrapper_url";
+
+    /**
+     * @param string $api_key
+     * @return string|false
+     */
+    public function callAPIMethod($api_key)
+    {
+        return Api::methodGetBotDetectorWrapperUrl($api_key);
+    }
+
+    /**
+     * @param string $wrapper_url
+     * @return bool
+     */
+    public function isWrapperAvailable($wrapper_url)
+    {
+        $request_class = Mloader::get('Http\Request');
+        $http = new $request_class();
+
+        $response = $http->setUrl($wrapper_url)
+            ->setPresets(['get_code'])
+            ->request();
+
+        return 200 === $response;
+    }
+
+    /**
+     * @param string $wrapper_url
+     * @return void
+     */
+    abstract public function saveWrapperURL($wrapper_url);
+
+    /**
+     * @return string|false
+     */
+    abstract public function loadWrapperURL();
+
+    /**
+     * @return string
+     */
+    public function getWrapperURL()
+    {
+        $url_from_bd = $this->loadWrapperURL();
+        if ( $url_from_bd ) {
+            return htmlspecialchars($url_from_bd, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+        }
+
+        return htmlspecialchars(
+            sprintf("https://%s/%s", self::BD_DEFAULT_DOMAIN, self::BD_DEFAULT_SCRIPT_NAME),
+            ENT_QUOTES | ENT_SUBSTITUTE,
+            'UTF-8'
+        );
+    }
+
+    /**
+     * @param string $api_key
+     * @return void
+     */
+    public function updateWrapperURL($api_key)
+    {
+        $url_from_api = $this->callAPIMethod($api_key);
+        if ( ! $this->validateWrapperURL($url_from_api) ) {
+            return;
+        }
+        if ( ! $this->isWrapperAvailable($url_from_api) ) {
+            return;
+        }
+        if ( ! $this->validateWrapperContent($url_from_api) ) {
+            return;
+        }
+
+        $url_from_bd = $this->loadWrapperURL();
+
+        if ( $url_from_api !== $url_from_bd ) {
+            $this->saveWrapperURL($url_from_api);
+        }
+    }
+
+    /**
+     * @param string $wrapper_url
+     * @return bool
+     */
+    private function validateWrapperURL($wrapper_url)
+    {
+        if ( ! is_string($wrapper_url) || $wrapper_url === '' ) {
+            return false;
+        }
+        $parts = parse_url($wrapper_url);
+        if ( empty($parts['scheme']) || empty($parts['host']) ) {
+            return false;
+        }
+        $scheme = strtolower($parts['scheme']);
+        if ( $scheme !== 'https' && $scheme !== 'http' ) {
+            return false;
+        }
+        $host = strtolower($parts['host']);
+
+        // Allow cleantalk.<domain> and subdomains like fd.cleantalk.org
+        return (bool) preg_match('/(^|\.)cleantalk\.[a-z0-9-]{2,}$/', $host);
+    }
+
+    /**
+     * @param $wrapper_url
+     * @return bool
+     */
+    private function validateWrapperContent($wrapper_url)
+    {
+        // 1) Get content from $wrapper_url
+        // 2) Validate this
+        return true;
+    }
+}
diff --git a/composer.json b/composer.json
index 8e98efb..e4893f2 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,13 @@
             "Cleantalk\\Common\\BotDetectorService\\": "/"
         }
     },
+    "require": {
+        "cleantalk/http": "*",
+        "cleantalk/templates": "*",
+        "cleantalk/api": "*",
+        "cleantalk/mloader": "*"
+
+    },
     "require-dev": {
         "vimeo/psalm": "^4.8",
         "phpunit/phpunit": "^8.5.52",
@@ -33,4 +40,4 @@
             "vendor/bin/psalm --no-cache --config=tests/psalm.xml --taint-analysis"
         ]
     }
-}
\ No newline at end of file
+}