diff --git a/.gitignore b/.gitignore
index e43b0f9..7ce5942 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 .DS_Store
+phpunit.xml
+vendor/
+composer.lock
\ No newline at end of file
diff --git a/README.md b/README.md
index 2af9afe..d804928 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
-IntaroCRM REST API client
+PHP client for retailCRM API
 =================
 
-PHP Client for [IntaroCRM REST API](http://docs.intarocrm.ru/rest-api/).
+PHP client for [retailCRM API](http://www.retailcrm.ru/docs/Разработчики/Разработчики#api).
 
 Requirements
 ------------
@@ -12,49 +12,82 @@ Requirements
 Installation
 ------------
 
-1) Install [composer](https://getcomposer.org/download/) into the project directory.
+1) Install [composer](https://getcomposer.org/download/)
 
-2) Add IntaroCRM REST API client in your composer.json:
-```js
-{
-    "require": {
-        "intarocrm/rest-api-client": "1.3.*"
-    }
-}
+2) Run:
+```bash
+composer require retailcrm/api-client-php 3.0
 ```
-3) Use command `php composer.phar update intarocrm/rest-api-client` to install new vendor into `vendor/` folder.
-
-
 
 Usage
-------------
+-----
 
-### Create API clent class
+Example of the receipt of order:
+```php
 
-``` php
-
-$crmApiClient = new \IntaroCrm\RestApi(
+$client = new \RetailCrm\ApiClient(
     'https://demo.intarocrm.ru',
     'T9DMPvuNt7FQJMszHUdG8Fkt6xHsqngH'
 );
-```
-Constructor arguments are:
-
-1. Your IntaroCRM acount URL-address
-2. Your site API Token
-
-### Example: get order types list
-
-``` php
 
 try {
-    $orderTypes = $crmApiClient->orderTypesList();
-}
-catch (\IntaroCrm\Exception\CurlException $e) {
-    //$logger->addError('orderTypesList: connection error');
-}
-catch (\IntaroCrm\Exception\ApiException $e) {
-    //$logger->addError('orderTypesList: ' . $e->getMessage());
+    $response = $client->ordersGet('M-2342');
+} catch (\RetailCrm\Exception\CurlException $e) {
+    echo "CRM connection error: " . $e->getMessage();
 }
 
+if ($response->isSuccessful()) {
+    echo $response->order['totalSumm'];
+    // or $response['order']['totalSumm'];
+    // or 
+    //    $order = $response->getOrder();
+    //    $order['totalSumm'];
+} else {
+    echo sprintf(
+        "Error of the order receipt: [Code %s] %s", 
+        $response->getStatusCode(),
+        $response->getErrorMsg()
+    );
+}
 ```
+
+Example of the order creating:
+```php
+
+$client = new \RetailCrm\ApiClient(
+    'https://demo.intarocrm.ru',
+    'T9DMPvuNt7FQJMszHUdG8Fkt6xHsqngH'
+);
+
+try {
+    $response = $client->ordersCreate(array(
+        'externalId' => 'some-shop-order-id',
+        'firstName' => 'Vasily',
+        'lastName' => 'Pupkin',
+        'items' => array(
+            //...
+        ),
+        'delivery' => array(
+            'code' => 'russian-post',
+        )
+    ));
+} catch (\RetailCrm\Exception\CurlException $e) {
+    echo "CRM connection error: " . $e->getMessage();
+}
+
+if ($response->isSuccessful()) {
+    if (201 === $response->getStatusCode()) {
+        echo 'Order created successfully! Order ID in CRM = ' . $response->id;
+            // or $response['id'];
+            // or $response->getId();
+    } else {
+        echo 'Order updated successfully!';
+    }
+} else {
+    echo sprintf(
+        "Error of the order creating: [Code %s] %s", 
+        $response->getStatusCode(),
+        $response->getErrorMsg()
+    );
+}
+```
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 4a0745b..aad1734 100644
--- a/composer.json
+++ b/composer.json
@@ -1,29 +1,28 @@
 {
-    "name": "intarocrm/rest-api-client",
-    "description": "PHP Client for IntaroCRM REST API",
+    "name": "retailcrm/api-client-php",
+    "description": "PHP client for retailCRM API",
     "type": "library",
-    "keywords": ["api", "Intaro CRM", "rest"],
-    "homepage": "http://www.intarocrm.ru/",
+    "keywords": ["API", "retailCRM", "REST"],
+    "homepage": "http://www.retailcrm.ru/",
     "authors": [
         {
-            "name": "Kruglov Kirill",
-            "email": "kruglov@intaro.ru",
-            "role": "Developer"
+            "name": "retailCRM",
+            "email": "support@retailcrm.ru"
         }
     ],
     "require": {
-        "php": ">=5.2.0",
+        "php": ">=5.3.0",
         "ext-curl": "*"
     },
     "support": {
         "email": "support@intarocrm.ru"
     },
     "autoload": {
-        "psr-0": { "IntaroCrm\\": "lib/" }
+        "psr-0": { "RetailCrm\\": "lib/" }
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.0.x-dev"
+            "dev-master": "3.0.x-dev"
         }
     }
 }
\ No newline at end of file
diff --git a/lib/IntaroCrm/Exception/ApiException.php b/lib/IntaroCrm/Exception/ApiException.php
deleted file mode 100644
index 75e4d8d..0000000
--- a/lib/IntaroCrm/Exception/ApiException.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-namespace IntaroCrm\Exception;
-
-class ApiException extends \Exception
-{
-}
\ No newline at end of file
diff --git a/lib/IntaroCrm/Exception/CurlException.php b/lib/IntaroCrm/Exception/CurlException.php
deleted file mode 100644
index f015aaa..0000000
--- a/lib/IntaroCrm/Exception/CurlException.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-namespace IntaroCrm\Exception;
-
-class CurlException extends \Exception
-{
-}
\ No newline at end of file
diff --git a/lib/IntaroCrm/RestApi.php b/lib/IntaroCrm/RestApi.php
deleted file mode 100644
index b201f74..0000000
--- a/lib/IntaroCrm/RestApi.php
+++ /dev/null
@@ -1,581 +0,0 @@
-<?php
-
-namespace IntaroCrm;
-
-class RestApi
-{
-    protected $apiUrl;
-    protected $apiKey;
-    protected $apiVersion = '3';
-    protected $generatedAt;
-
-    protected $parameters;
-
-    /**
-     * @param string $crmUrl - адрес CRM
-     * @param string $apiKey - ключ для работы с api
-     */
-    public function __construct($crmUrl, $apiKey)
-    {
-        $this->apiUrl = $crmUrl.'/api/v'.$this->apiVersion.'/';
-        $this->apiKey = $apiKey;
-        $this->parameters = array('apiKey' => $this->apiKey);
-    }
-
-    /* Методы для работы с заказами */
-    /**
-     * Получение заказа по id
-     *
-     * @param string $id - идентификатор заказа
-     * @param string $by - поиск заказа по id или externalId
-     * @return array - информация о заказе
-     */
-    public function orderGet($id, $by = 'externalId')
-    {
-        $url = $this->apiUrl.'orders/'.$id;
-
-        if ($by != 'externalId')
-            $this->parameters['by'] = $by;
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Создание заказа
-     *
-     * @param array $order- информация о заказе
-     * @return array
-     */
-    public function orderCreate($order)
-    {
-        $dataJson = json_encode($order);
-        $this->parameters['order'] = $dataJson;
-
-        $url = $this->apiUrl.'orders/create';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Изменение заказа
-     *
-     * @param array $order- информация о заказе
-     * @return array
-     */
-    public function orderEdit($order)
-    {
-        $dataJson = json_encode($order);
-        $this->parameters['order'] = $dataJson;
-
-        $url = $this->apiUrl.'orders/'.$order['externalId'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Пакетная загрузка заказов
-     *
-     * @param array $orders - массив заказов
-     * @return array
-     */
-    public function orderUpload($orders)
-    {
-        $dataJson = json_encode($orders);
-        $this->parameters['orders'] = $dataJson;
-
-        $url = $this->apiUrl.'orders/upload';
-        $result = $this->curlRequest($url, 'POST');
-        if (is_null($result) && isset($result['uploadedOrders']))
-            return $result['uploadedOrders'];
-        return $result;
-    }
-
-    /**
-     * Обновление externalId у заказов с переданными id
-     *
-     * @param array $orders- массив, содержащий id и externalId заказа
-     * @return array
-     */
-    public function orderFixExternalIds($order)
-    {
-        $dataJson = json_encode($order);
-        $this->parameters['orders'] = $dataJson;
-
-        $url = $this->apiUrl.'orders/fix-external-ids';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Получение последних измененных заказов
-     *
-     * @param \DateTime|string|int $startDate - начальная дата и время выборки (Y-m-d H:i:s)
-     * @param \DateTime|string|int $endDate   - конечная дата и время выборки (Y-m-d H:i:s)
-     * @param int $limit - ограничение на размер выборки
-     * @param int $offset - сдвиг
-     * @return array - массив заказов
-     */
-    public function orderHistory($startDate = null, $endDate = null, $limit = 100, $offset = 0)
-    {
-        $url = $this->apiUrl.'orders/history';
-        $this->parameters['startDate'] = $this->ensureDateTime($startDate);
-        $this->parameters['endDate'] = $this->ensureDateTime($endDate);
-        $this->parameters['limit'] = $limit;
-        $this->parameters['offset'] = $offset;
-
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /* Методы для работы с клиентами */
-    /**
-     * Получение клиента по id
-     *
-     * @param string $id - идентификатор
-     * @param string $by - поиск заказа по id или externalId
-     * @return array - информация о клиенте
-     */
-    public function customerGet($id, $by = 'externalId')
-    {
-        $url = $this->apiUrl.'customers/'.$id;
-        if ($by != 'externalId')
-            $this->parameters['by'] = $by;
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Получение списка клиентов в соответсвии с запросом
-     *
-     * @param string $phone - телефон
-     * @param string $email - почтовый адрес
-     * @param string $fio - фио пользователя
-     * @param int $limit - ограничение на размер выборки
-     * @param int $offset - сдвиг
-     * @return array - массив клиентов
-     */
-    public function customers($phone = null, $email = null, $fio = null, $limit = 200, $offset = 0)
-    {
-        $url = $this->apiUrl.'customers';
-        if($phone) $this->parameters['phone'] = $phone;
-        if($email) $this->parameters['email'] = $email;
-        if($fio) $this->parameters['fio'] = $fio;
-        $this->parameters['limit'] = $limit;
-        $this->parameters['offset'] = $offset;
-
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Создание клиента
-     *
-     * @param array $customer - информация о клиенте
-     * @return array
-     */
-    public function customerCreate($customer)
-    {
-        $dataJson = json_encode($customer);
-        $this->parameters['customer'] = $dataJson;
-
-        $url = $this->apiUrl.'customers/create';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Редактирование клиента
-     *
-     * @param array $customer - информация о клиенте
-     * @return array
-     */
-    public function customerEdit($customer)
-    {
-        $dataJson = json_encode($customer);
-        $this->parameters['customer'] = $dataJson;
-
-        $url = $this->apiUrl.'customers/'.$customer['externalId'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Пакетная загрузка клиентов
-     *
-     * @param array $customers - массив клиентов
-     * @return array
-     */
-    public function customerUpload($customers)
-    {
-        $dataJson = json_encode($customers);
-        $this->parameters['customers'] = $dataJson;
-
-        $url = $this->apiUrl.'customers/upload';
-        $result = $this->curlRequest($url, 'POST');
-        if (is_null($result) && isset($result['uploaded']))
-            return $result['uploaded'];
-        return $result;
-    }
-
-    /**
-     * Обновление externalId у клиентов с переданными id
-     *
-     * @param array $customers- массив, содержащий id и externalId заказа
-     * @return array
-     */
-    public function customerFixExternalIds($customers)
-    {
-        $dataJson = json_encode($customers);
-        $this->parameters['customers'] = $dataJson;
-
-        $url = $this->apiUrl.'customers/fix-external-ids';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Получение списка заказов клиента
-     *
-     * @param string $id - идентификатор клиента
-     * @param string $by - поиск заказа по id или externalId
-     * @param \DateTime|string|int $startDate - начальная дата выборки (Y-m-d H:i:s)
-     * @param \DateTime|string|int $endDate   - конечная дата выборки (Y-m-d H:i:s)
-     * @param int $limit - ограничение на размер выборки
-     * @param int $offset - сдвиг
-     * @return array - массив заказов
-     */
-    public function customerOrdersList($id, $startDate = null, $endDate = null,
-        $limit = 100, $offset = 0, $by = 'externalId')
-    {
-        $url = $this->apiUrl.'customers/'.$id.'/orders';
-        if ($by != 'externalId')
-            $this->parameters['by'] = $by;
-        $this->parameters['startDate'] = $this->ensureDateTime($startDate);
-        $this->parameters['endDate'] = $this->ensureDateTime($endDate);
-        $this->parameters['limit'] = $limit;
-        $this->parameters['offset'] = $offset;
-
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /* Методы для работы со справочниками */
-    /**
-     * Получение списка типов доставки
-     *
-     * @return array - массив типов доставки
-     */
-    public function deliveryTypesList()
-    {
-        $url = $this->apiUrl.'reference/delivery-types';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование типа доставки
-     *
-     * @param array $deliveryType - информация о типе доставки
-     * @return array
-     */
-    public function deliveryTypeEdit($deliveryType)
-    {
-        $dataJson = json_encode($deliveryType);
-        $this->parameters['deliveryType'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/delivery-types/'.$deliveryType['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Получение списка служб доставки
-     *
-     * @return array - массив типов доставки
-     */
-    public function deliveryServicesList()
-    {
-        $url = $this->apiUrl.'reference/delivery-services';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование службы доставки
-     *
-     * @param array $deliveryService - информация о типе доставки
-     * @return array
-     */
-    public function deliveryServiceEdit($deliveryService)
-    {
-        $dataJson = json_encode($deliveryService);
-        $this->parameters['deliveryService'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/delivery-services/'.$deliveryService['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-
-    /**
-     * Получение списка типов оплаты
-     *
-     * @return array - массив типов оплаты
-     */
-    public function paymentTypesList()
-    {
-        $url = $this->apiUrl.'reference/payment-types';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование типа оплаты
-     *
-     * @param array $paymentType - информация о типе оплаты
-     * @return array
-     */
-    public function paymentTypesEdit($paymentType)
-    {
-        $dataJson = json_encode($paymentType);
-        $this->parameters['paymentType'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/payment-types/'.$paymentType['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-
-    /**
-     * Получение списка статусов оплаты
-     *
-     * @return array - массив статусов оплаты
-     */
-    public function paymentStatusesList()
-    {
-        $url = $this->apiUrl.'reference/payment-statuses';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование статуса оплаты
-     *
-     * @param array $paymentStatus - информация о статусе оплаты
-     * @return array
-     */
-    public function paymentStatusesEdit($paymentStatus)
-    {
-        $dataJson = json_encode($paymentStatus);
-        $this->parameters['paymentStatus'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/payment-statuses/'.$paymentStatus['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-
-    /**
-     * Получение списка типов заказа
-     *
-     * @return array - массив типов заказа
-     */
-    public function orderTypesList()
-    {
-        $url = $this->apiUrl.'reference/order-types';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование типа заказа
-     *
-     * @param array $orderType - информация о типе заказа
-     * @return array
-     */
-    public function orderTypesEdit($orderType)
-    {
-        $dataJson = json_encode($orderType);
-        $this->parameters['orderType'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/order-types/'.$orderType['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-
-    /**
-     * Получение списка способов оформления заказа
-     *
-     * @return array - массив способов оформления заказа
-     */
-    public function orderMethodsList()
-    {
-        $url = $this->apiUrl.'reference/order-methods';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование способа оформления заказа
-     *
-     * @param array $orderMethod - информация о способе оформления заказа
-     * @return array
-     */
-    public function orderMethodsEdit($orderMethod)
-    {
-        $dataJson = json_encode($orderMethod);
-        $this->parameters['orderMethod'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/order-methods/'.$orderMethod['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-    /**
-     * Получение списка статусов заказа
-     *
-     * @return array - массив статусов заказа
-     */
-    public function orderStatusesList()
-    {
-        $url = $this->apiUrl.'reference/statuses';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Редактирование статуса заказа
-     *
-     * @param array $status - информация о статусе заказа
-     * @return array
-     */
-    public function orderStatusEdit($status)
-    {
-        $dataJson = json_encode($status);
-        $this->parameters['status'] = $dataJson;
-
-        $url = $this->apiUrl.'reference/statuses/'.$status['code'].'/edit';
-        $result = $this->curlRequest($url, 'POST');
-        return $result;
-    }
-
-
-    /**
-     * Получение списка групп статусов заказа
-     *
-     * @return array - массив групп статусов заказа
-     */
-    public function orderStatusGroupsList()
-    {
-        $url = $this->apiUrl.'reference/status-groups';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * Обновление статистики
-     *
-     * @return array - статус вып обновления
-     */
-    public function statisticUpdate()
-    {
-        $url = $this->apiUrl.'statistic/update';
-        $result = $this->curlRequest($url);
-        return $result;
-    }
-
-    /**
-     * @return \DateTime
-     */
-    public function getGeneratedAt() 
-    {
-        return $this->generatedAt;
-    }
-
-    protected function ensureDateTime($value)
-    {
-        if ($value instanceof \DateTime) {
-            return $value->format('Y-m-d H:i:s');
-        } elseif (is_int($value)) {
-            return date('Y-m-d H:i:s', $value);
-        }
-
-        return $value;
-    }
-
-    protected function getErrorMessage($response)
-    {
-        $str = '';
-        if (isset($response['message']))
-            $str = $response['message'];
-        elseif (isset($response[0]['message']))
-            $str = $response[0]['message'];
-        elseif (isset($response['error']) && isset($response['error']['message']))
-            $str = $response['error']['message'];
-        elseif (isset($response['errorMsg']))
-            $str = $response['errorMsg'];
-
-        if (isset($response['errors']) && sizeof($response['errors'])) {
-            foreach ($response['errors'] as $error)
-                $str .= '. ' . $error;
-        }
-
-        if (!strlen($str))
-            return 'Application Error';
-
-        return $str;
-    }
-
-    protected function curlRequest($url, $method = 'GET', $format = 'json')
-    {
-        if ($method == 'GET' && !is_null($this->parameters))
-            $url .= '?'.http_build_query($this->parameters);
-
-        $ch = curl_init();
-        curl_setopt($ch, CURLOPT_URL, $url);
-        curl_setopt($ch, CURLOPT_FAILONERROR, FALSE);
-        //curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);// allow redirects
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // return into a variable
-        curl_setopt($ch, CURLOPT_TIMEOUT, 30); // times out after 30s
-        //curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
-
-
-        if ($method == 'POST')
-        {
-            curl_setopt($ch, CURLOPT_POST, true);
-            curl_setopt($ch, CURLOPT_POSTFIELDS, $this->parameters);
-        }
-
-        $response = curl_exec($ch);
-        $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-        unset($this->parameters);
-        /* Сброс массива с параметрами */
-        $this->parameters = array('apiKey' => $this->apiKey);
-
-        $errno = curl_errno($ch);
-        $error = curl_error($ch);
-        curl_close($ch);
-
-        if ($errno)
-            throw new Exception\CurlException($error, $errno);
-
-        $result = json_decode($response, true);
-
-        if ($statusCode >= 400 || isset($result['success']) && $result['success'] === false) {
-            throw new Exception\ApiException($this->getErrorMessage($result), $statusCode);
-        }
-
-        if (isset($result['generatedAt'])) {
-            $this->generatedAt = new \DateTime($result['generatedAt']);
-            unset($result['generatedAt']);
-        }
-
-        unset($result['success']);
-
-        if (count($result) == 0)
-            return true;
-
-        return reset($result);
-    }
-}
diff --git a/lib/RetailCrm/ApiClient.php b/lib/RetailCrm/ApiClient.php
new file mode 100644
index 0000000..6316363
--- /dev/null
+++ b/lib/RetailCrm/ApiClient.php
@@ -0,0 +1,571 @@
+<?php
+
+namespace RetailCrm;
+
+use RetailCrm\Http\Client;
+use RetailCrm\Response\ApiResponse;
+
+/**
+ *  retailCRM API client class
+ */
+class ApiClient
+{
+    const VERSION = 'v3';
+
+    protected $client;
+
+    /**
+     * Client creating
+     *
+     * @param  string $url
+     * @param  string $apiKey
+     * @return void
+     */
+    public function __construct($url, $apiKey)
+    {
+        if ('/' != substr($url, strlen($url) - 1, 1)) {
+            $url .= '/';
+        }
+
+        $url = $url . 'api/' . self::VERSION;
+
+        $this->client = new Client($url, array('apiKey' => $apiKey));
+    }
+
+    /**
+     * Create a order
+     *
+     * @param  array       $order
+     * @return ApiResponse
+     */
+    public function ordersCreate(array $order)
+    {
+        if (!sizeof($order)) {
+            throw new \InvalidArgumentException('Parameter `order` must contains a data');
+        }
+
+        return $this->client->makeRequest("/orders/create", Client::METHOD_POST, array(
+            'order' => json_encode($order)
+        ));
+    }
+
+    /**
+     * Edit a order
+     *
+     * @param  array       $order
+     * @return ApiResponse
+     */
+    public function ordersEdit(array $order, $by = 'externalId')
+    {
+        if (!sizeof($order)) {
+            throw new \InvalidArgumentException('Parameter `order` must contains a data');
+        }
+
+        $this->checkIdParameter($by);
+
+        if (!isset($order[$by])) {
+            throw new \InvalidArgumentException(sprintf('Order array must contain the "%s" parameter.', $by));
+        }
+
+        return $this->client->makeRequest("/orders/" . $order[$by] . "/edit", Client::METHOD_POST, array(
+            'order' => json_encode($order),
+            'by' => $by,
+        ));
+    }
+
+    /**
+     * Upload array of the orders
+     *
+     * @param  array       $orders
+     * @return ApiResponse
+     */
+    public function ordersUpload(array $orders)
+    {
+        if (!sizeof($orders)) {
+            throw new \InvalidArgumentException('Parameter `orders` must contains array of the orders');
+        }
+
+        return $this->client->makeRequest("/orders/upload", Client::METHOD_POST, array(
+            'orders' => json_encode($orders),
+        ));
+    }
+
+    /**
+     * Get order by id or externalId
+     *
+     * @param  string      $id
+     * @param  string      $by (default: 'externalId')
+     * @return ApiResponse
+     */
+    public function ordersGet($id, $by = 'externalId')
+    {
+        $this->checkIdParameter($by);
+
+        return $this->client->makeRequest("/orders/$id", Client::METHOD_GET, array('by' => $by));
+    }
+
+    /**
+     * Returns a orders history
+     *
+     * @param  \DateTime   $startDate (default: null)
+     * @param  \DateTime   $endDate (default: null)
+     * @param  int         $limit (default: 100)
+     * @param  int         $offset (default: 0)
+     * @return ApiResponse
+     */
+    public function ordersHistory(\DateTime $startDate = null, \DateTime $endDate = null, $limit = 100, $offset = 0)
+    {
+        $parameters = array();
+
+        if ($startDate) {
+            $parameters['startDate'] = $startDate->format('Y-m-d H:i:s');
+        }
+        if ($endDate) {
+            $parameters['endDate'] = $endDate->format('Y-m-d H:i:s');
+        }
+        if ($limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        if ($offset) {
+            $parameters['offset'] = (int) $offset;
+        }
+
+        return $this->client->makeRequest('/orders/history', Client::METHOD_GET, $parameters);
+    }
+
+    /**
+     * Returns filtered orders list
+     *
+     * @param  array       $filter (default: array())
+     * @param  int         $page (default: null)
+     * @param  int         $limit (default: null)
+     * @return ApiResponse
+     */
+    public function ordersList(array $filter = array(), $page = null, $limit = null)
+    {
+        $parameters = array();
+
+        if (sizeof($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+
+        return $this->client->makeRequest('/orders', Client::METHOD_GET, $parameters);
+    }
+
+    /**
+     * Save order IDs' (id and externalId) association in the CRM
+     *
+     * @param  array       $ids
+     * @return ApiResponse
+     */
+    public function ordersFixExternalIds(array $ids)
+    {
+        if (!sizeof($ids)) {
+            throw new \InvalidArgumentException('Method parameter must contains at least one IDs pair');
+        }
+
+        return $this->client->makeRequest("/orders/fix-external-ids", Client::METHOD_POST, array(
+            'orders' => json_encode($ids),
+        ));
+    }
+
+    /**
+     * Create a customer
+     *
+     * @param  array       $customer
+     * @return ApiResponse
+     */
+    public function customersCreate(array $customer)
+    {
+        if (!sizeof($customer)) {
+            throw new \InvalidArgumentException('Parameter `customer` must contains a data');
+        }
+
+        return $this->client->makeRequest("/customers/create", Client::METHOD_POST, array(
+            'customer' => json_encode($customer)
+        ));
+    }
+
+    /**
+     * Edit a customer
+     *
+     * @param  array       $customer
+     * @return ApiResponse
+     */
+    public function customersEdit(array $customer, $by = 'externalId')
+    {
+        if (!sizeof($customer)) {
+            throw new \InvalidArgumentException('Parameter `customer` must contains a data');
+        }
+
+        $this->checkIdParameter($by);
+
+        if (!isset($customer[$by])) {
+            throw new \InvalidArgumentException(sprintf('Customer array must contain the "%s" parameter.', $by));
+        }
+
+        return $this->client->makeRequest("/customers/" . $customer[$by] . "/edit", Client::METHOD_POST, array(
+            'customer' => json_encode($customer),
+            'by' => $by,
+        ));
+    }
+
+    /**
+     * Upload array of the customers
+     *
+     * @param  array       $customers
+     * @return ApiResponse
+     */
+    public function customersUpload(array $customers)
+    {
+        if (!sizeof($customers)) {
+            throw new \InvalidArgumentException('Parameter `customers` must contains array of the customers');
+        }
+
+        return $this->client->makeRequest("/customers/upload", Client::METHOD_POST, array(
+            'customers' => json_encode($customers),
+        ));
+    }
+
+    /**
+     * Get customer by id or externalId
+     *
+     * @param  string      $id
+     * @param  string      $by (default: 'externalId')
+     * @return ApiResponse
+     */
+    public function customersGet($id, $by = 'externalId')
+    {
+        $this->checkIdParameter($by);
+
+        return $this->client->makeRequest("/customers/$id", Client::METHOD_GET, array('by' => $by));
+    }
+
+    /**
+     * Returns filtered customers list
+     *
+     * @param  array       $filter (default: array())
+     * @param  int         $page (default: null)
+     * @param  int         $limit (default: null)
+     * @return ApiResponse
+     */
+    public function customersList(array $filter = array(), $page = null, $limit = null)
+    {
+        $parameters = array();
+
+        if (sizeof($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+
+        return $this->client->makeRequest('/customers', Client::METHOD_GET, $parameters);
+    }
+
+    /**
+     * Save customer IDs' (id and externalId) association in the CRM
+     *
+     * @param  array       $ids
+     * @return ApiResponse
+     */
+    public function customersFixExternalIds(array $ids)
+    {
+        if (!sizeof($ids)) {
+            throw new \InvalidArgumentException('Method parameter must contains at least one IDs pair');
+        }
+
+        return $this->client->makeRequest("/customers/fix-external-ids", Client::METHOD_POST, array(
+            'customers' => json_encode($ids),
+        ));
+    }
+
+    /**
+     * Returns deliveryServices list
+     *
+     * @return ApiResponse
+     */
+    public function deliveryServicesList()
+    {
+        return $this->client->makeRequest('/reference/delivery-services', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns deliveryTypes list
+     *
+     * @return ApiResponse
+     */
+    public function deliveryTypesList()
+    {
+        return $this->client->makeRequest('/reference/delivery-types', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns orderMethods list
+     *
+     * @return ApiResponse
+     */
+    public function orderMethodsList()
+    {
+        return $this->client->makeRequest('/reference/order-methods', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns orderTypes list
+     *
+     * @return ApiResponse
+     */
+    public function orderTypesList()
+    {
+        return $this->client->makeRequest('/reference/order-types', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns paymentStatuses list
+     *
+     * @return ApiResponse
+     */
+    public function paymentStatusesList()
+    {
+        return $this->client->makeRequest('/reference/payment-statuses', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns paymentTypes list
+     *
+     * @return ApiResponse
+     */
+    public function paymentTypesList()
+    {
+        return $this->client->makeRequest('/reference/payment-types', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns productStatuses list
+     *
+     * @return ApiResponse
+     */
+    public function productStatusesList()
+    {
+        return $this->client->makeRequest('/reference/product-statuses', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns statusGroups list
+     *
+     * @return ApiResponse
+     */
+    public function statusGroupsList()
+    {
+        return $this->client->makeRequest('/reference/status-groups', Client::METHOD_GET);
+    }
+
+    /**
+     * Returns statuses list
+     *
+     * @return ApiResponse
+     */
+    public function statusesList()
+    {
+        return $this->client->makeRequest('/reference/statuses', Client::METHOD_GET);
+    }
+
+    /**
+     * Edit deliveryService
+     *
+     * @return ApiResponse
+     */
+    public function deliveryServicesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/delivery-services/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'deliveryService' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit deliveryType
+     *
+     * @return ApiResponse
+     */
+    public function deliveryTypesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/delivery-types/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'deliveryType' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit orderMethod
+     *
+     * @return ApiResponse
+     */
+    public function orderMethodsEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/order-methods/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'orderMethod' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit orderType
+     *
+     * @return ApiResponse
+     */
+    public function orderTypesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/order-types/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'orderType' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit paymentStatus
+     *
+     * @return ApiResponse
+     */
+    public function paymentStatusesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/payment-statuses/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'paymentStatus' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit paymentType
+     *
+     * @return ApiResponse
+     */
+    public function paymentTypesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/payment-types/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'paymentType' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit productStatus
+     *
+     * @return ApiResponse
+     */
+    public function productStatusesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/product-statuses/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'productStatus' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Edit order status
+     *
+     * @return ApiResponse
+     */
+    public function statusesEdit(array $data)
+    {
+        if (!isset($data['code'])) {
+            throw new \InvalidArgumentException('Data must contain "code" parameter.');
+        }
+
+        return $this->client->makeRequest(
+            '/reference/statuses/' . $data['code'] . '/edit',
+            Client::METHOD_POST,
+            array(
+                'status' => json_encode($data)
+            )
+        );
+    }
+
+    /**
+     * Update CRM basic statistic
+     *
+     * @return ApiResponse
+     */
+    public function statisticUpdate()
+    {
+        return $this->client->makeRequest('/statistic/update', Client::METHOD_GET);
+    }
+
+    /**
+     * Check ID parameter
+     *
+     * @param  string $by
+     * @return bool
+     */
+    protected function checkIdParameter($by)
+    {
+        $allowedForBy = array('externalId', 'id');
+        if (!in_array($by, $allowedForBy)) {
+            throw new \InvalidArgumentException(sprintf(
+                'Value "%s" for parameter "by" is not valid. Allowed values are %s.',
+                $by,
+                implode(', ', $allowedForBy)
+            ));
+        }
+
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/lib/RetailCrm/Exception/CurlException.php b/lib/RetailCrm/Exception/CurlException.php
new file mode 100644
index 0000000..098fc30
--- /dev/null
+++ b/lib/RetailCrm/Exception/CurlException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace RetailCrm\Exception;
+
+class CurlException extends \RuntimeException
+{
+}
\ No newline at end of file
diff --git a/lib/RetailCrm/Exception/InvalidJsonException.php b/lib/RetailCrm/Exception/InvalidJsonException.php
new file mode 100644
index 0000000..f7edb1c
--- /dev/null
+++ b/lib/RetailCrm/Exception/InvalidJsonException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace RetailCrm\Exception;
+
+class InvalidJsonException extends \DomainException
+{
+}
\ No newline at end of file
diff --git a/lib/RetailCrm/Http/Client.php b/lib/RetailCrm/Http/Client.php
new file mode 100644
index 0000000..d381b06
--- /dev/null
+++ b/lib/RetailCrm/Http/Client.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace RetailCrm\Http;
+
+use RetailCrm\Exception\CurlException;
+use RetailCrm\Response\ApiResponse;
+
+/**
+ * HTTP client
+ */
+class Client
+{
+    const METHOD_GET = 'GET';
+    const METHOD_POST = 'POST';
+
+    protected $url;
+    protected $defaultParameters;
+
+    public function __construct($url, array $defaultParameters = array())
+    {
+        if (false === stripos($url, 'https://')) {
+            throw new \InvalidArgumentException('API schema requires HTTPS protocol');
+        }
+
+        $this->url = $url;
+        $this->defaultParameters = $defaultParameters;
+    }
+
+    /**
+     * Make HTTP request
+     *
+     * @param  string      $path
+     * @param  string      $method (default: 'GET')
+     * @param  array       $parameters (default: array())
+     * @return ApiResponse
+     */
+    public function makeRequest($path, $method, array $parameters = array(), $timeout = 30)
+    {
+        $allowedMethods = array(self::METHOD_GET, self::METHOD_POST);
+        if (!in_array($method, $allowedMethods)) {
+            throw new \InvalidArgumentException(sprintf(
+                'Method "%s" is not valid. Allowed methods are %s',
+                $method,
+                implode(', ', $allowedMethods)
+            ));
+        }
+
+        $parameters = array_merge($this->defaultParameters, $parameters);
+
+        $path = $this->url . $path;
+        if (self::METHOD_GET === $method && sizeof($parameters)) {
+            $path .= '?' . http_build_query($parameters);
+        }
+
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $path);
+        curl_setopt($ch, CURLOPT_FAILONERROR, FALSE);
+        // curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // allow redirects
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // return into a variable
+        curl_setopt($ch, CURLOPT_TIMEOUT, (int) $timeout); // times out after 30s
+        // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+
+        if (self::METHOD_POST === $method) {
+            curl_setopt($ch, CURLOPT_POST, true);
+            curl_setopt($ch, CURLOPT_POSTFIELDS, $parameters);
+        }
+
+        $responseBody = curl_exec($ch);
+        $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+
+        $errno = curl_errno($ch);
+        $error = curl_error($ch);
+        curl_close($ch);
+
+        if ($errno) {
+            throw new CurlException($error, $errno);
+        }
+
+        return new ApiResponse($statusCode, $responseBody);
+    }
+ }
diff --git a/lib/RetailCrm/Response/ApiResponse.php b/lib/RetailCrm/Response/ApiResponse.php
new file mode 100644
index 0000000..c35c6db
--- /dev/null
+++ b/lib/RetailCrm/Response/ApiResponse.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace RetailCrm\Response;
+
+use RetailCrm\Exception\InvalidJsonException;
+
+/**
+ * Response from retailCRM API
+ */
+class ApiResponse implements \ArrayAccess
+{
+    // HTTP response status code
+    protected $statusCode;
+
+    // response assoc array
+    protected $response;
+
+    public function __construct($statusCode, $responseBody = null)
+    {
+        $this->statusCode = (int) $statusCode;
+
+        if (!empty($responseBody)) {
+            $response = json_decode($responseBody, true);
+
+            if (!$response && JSON_ERROR_NONE !== ($error = json_last_error())) {
+                throw new InvalidJsonException(
+                    "Invalid JSON in the API response body. Error code #$error",
+                    $error
+                );
+            }
+
+            $this->response = $response;
+        }
+    }
+
+    /**
+     * Return HTTP response status code
+     *
+     * @return int
+     */
+    public function getStatusCode()
+    {
+        return $this->statusCode;
+    }
+
+    /**
+     * HTTP request was successful
+     *
+     * @return bool
+     */
+    public function isSuccessful()
+    {
+        return $this->statusCode < 400;
+    }
+
+    /**
+     * Allow to access for the property throw class method
+     *
+     * @param  string $name
+     * @return mixed
+     */
+    public function __call($name, $arguments)
+    {
+        // convert getSomeProperty to someProperty
+        $propertyName = strtolower(substr($name, 3, 1)) . substr($name, 4);
+
+        if (!isset($this->response[$propertyName])) {
+            throw new \InvalidArgumentException("Method \"$name\" not found");
+        }
+
+        return $this->response[$propertyName];
+    }
+
+    /**
+     * Allow to access for the property throw object property
+     *
+     * @param  string $name
+     * @return mixed
+     */
+    public function __get($name)
+    {
+        if (!isset($this->response[$name])) {
+            throw new \InvalidArgumentException("Property \"$name\" not found");
+        }
+
+        return $this->response[$name];
+    }
+
+    public function offsetSet($offset, $value)
+    {
+        throw new \BadMethodCallException('This activity not allowed');
+    }
+
+    public function offsetUnset($offset)
+    {
+        throw new \BadMethodCallException('This call not allowed');
+    }
+
+    public function offsetExists($offset)
+    {
+        return isset($this->response[$offset]);
+    }
+
+    public function offsetGet($offset)
+    {
+        if (!isset($this->response[$offset])) {
+            throw new \InvalidArgumentException("Property \"$offset\" not found");
+        }
+
+        return $this->response[$offset];
+    }
+}
\ No newline at end of file
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..ac37b0e
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="./tests/bootstrap.php" colors="true">
+
+    <!-- Dummy values used to provide credentials. No need to change these. -->
+    <php>
+        <server name="CRM_URL" value="foo" />
+        <server name="CRM_API_KEY" value="bar" />
+    </php>
+
+    <testsuites>
+        <testsuite name="RetailCrm">
+            <directory>tests/RetailCrm/Tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory suffix=".php">./src/RetailCrm</directory>
+        </whitelist>
+    </filter>
+</phpunit>
diff --git a/tests/RetailCrm/Test/TestCase.php b/tests/RetailCrm/Test/TestCase.php
new file mode 100644
index 0000000..c004a66
--- /dev/null
+++ b/tests/RetailCrm/Test/TestCase.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace RetailCrm\Test;
+
+use RetailCrm\ApiClient;
+
+class TestCase extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Return ApiClient object
+     *
+     * @param  string    $url (default: null)
+     * @param  string    $apiKey (default: null)
+     * @return ApiClient
+     */
+    public static function getApiClient($url = null, $apiKey = null)
+    {
+        return new ApiClient($url ?: $_SERVER['CRM_URL'], $apiKey ?: $_SERVER['CRM_API_KEY']);
+    }
+}
\ No newline at end of file
diff --git a/tests/RetailCrm/Tests/ApiClientCustomersTest.php b/tests/RetailCrm/Tests/ApiClientCustomersTest.php
new file mode 100644
index 0000000..cde18d6
--- /dev/null
+++ b/tests/RetailCrm/Tests/ApiClientCustomersTest.php
@@ -0,0 +1,271 @@
+<?php
+
+namespace RetailCrm\Tests;
+
+use RetailCrm\Test\TestCase;
+
+class ApiClientCustomersTest extends TestCase
+{
+    const FIRST_NAME = 'Иннокентий';
+
+    /**
+     * @group integration
+     */
+    public function testCustomersCreate()
+    {
+        $client = static::getApiClient();
+
+        $externalId = 'c-create-' . time();
+
+        $response = $client->customersCreate(array(
+            'firstName' => self::FIRST_NAME,
+            'externalId' => $externalId,
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(201, $response->getStatusCode());
+        $this->assertTrue(is_int($response->getId()));
+
+        return array(
+            'id' => $response->getId(),
+            'externalId' => $externalId,
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersCreateExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersCreate(array());
+    }
+
+    /**
+     * @group integration
+     * @depends testCustomersCreate
+     */
+    public function testCustomersGet(array $ids)
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersGet(678678678);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(404, $response->getStatusCode());
+        $this->assertFalse($response->success);
+
+        $response = $client->customersGet($ids['id'], 'id');
+        $customerById = $response->customer;
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertTrue($response->success);
+        $this->assertEquals(self::FIRST_NAME, $response->customer['firstName']);
+
+        $response = $client->customersGet($ids['externalId'], 'externalId');
+        $this->assertEquals($customerById['id'], $response->customer['id']);
+
+        return $ids;
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersGetException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersGet(678678678, 'asdf');
+    }
+
+    /**
+     * @group integration
+     * @depends testCustomersGet
+     */
+    public function testCustomersEdit(array $ids)
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersEdit(
+            array(
+                'id' => 22342134,
+                'lastName' => '12345',
+            ),
+            'id'
+        );
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(404, $response->getStatusCode());
+
+        $response = $client->customersEdit(array(
+            'externalId' => $ids['externalId'],
+            'lastName' => '12345',
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertTrue($response->success);
+
+        $response = $client->customersEdit(array(
+            'externalId' => 'c-edit-' . time(),
+            'lastName' => '12345',
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(201, $response->getStatusCode());
+        $this->assertTrue($response->success);
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersEditExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersEdit(array(), 'asdf');
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersEditException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersEdit(array('id' => 678678678), 'asdf');
+    }
+
+    /**
+     * @group integration
+     */
+    public function testCustomersList()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersList();
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertTrue($response->isSuccessful());
+        $this->assertTrue(isset($response['customers']));
+
+        $response = $client->customersList(array(), 1, 300);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertFalse(
+            $response->isSuccessful(),
+            'Pagination error'
+        );
+
+        $response = $client->customersList(array('maxOrdersCount' => 10), 1);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'API returns customers list'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersFixExternalIdsException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersFixExternalIds(array());
+    }
+
+    /**
+     * @group integration
+     */
+    public function testCustomersFixExternalIds()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersCreate(array(
+            'firstName' => 'Aaa111',
+        ));
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Order created'
+        );
+
+        $response = $client->ordersGet($response->id, 'id');
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Order fetched'
+        );
+
+        $id = $response->order['customer']['id'];
+        $externalId = 'asdf' . time();
+
+        $response = $client->customersFixExternalIds(array(
+            array('id' => $id, 'externalId' => $externalId)
+        ));
+
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Fixed customer ids'
+        );
+
+        $response = $client->customersGet($externalId);
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Got customer'
+        );
+        $this->assertEquals(
+            $id,
+            $response->customer['id'],
+            'Fixing of customer ids were right'
+        );
+        $this->assertEquals(
+            $externalId,
+            $response->customer['externalId'],
+            'Fixing of customer ids were right'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testCustomersUploadExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->customersUpload(array());
+    }
+
+    /**
+     * @group integration
+     */
+    public function testCustomersUpload()
+    {
+        $client = static::getApiClient();
+
+        $externalIdA = 'upload-a-' . time();
+        $externalIdB = 'upload-b-' . time();
+
+        $response = $client->customersUpload(array(
+            array(
+                'externalId' => $externalIdA,
+                'firstName' => 'Aaa',
+            ),
+            array(
+                'externalId' => $externalIdB,
+                'lastName' => 'Bbb',
+            ),
+        ));
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Got customer'
+        );
+        $this->assertEquals(
+            $externalIdA,
+            $response->uploadedCustomers[0]['externalId']
+        );
+        $this->assertEquals(
+            $externalIdB,
+            $response->uploadedCustomers[1]['externalId']
+        );
+    }
+}
diff --git a/tests/RetailCrm/Tests/ApiClientOrdersTest.php b/tests/RetailCrm/Tests/ApiClientOrdersTest.php
new file mode 100644
index 0000000..315663a
--- /dev/null
+++ b/tests/RetailCrm/Tests/ApiClientOrdersTest.php
@@ -0,0 +1,286 @@
+<?php
+
+namespace RetailCrm\Tests;
+
+use RetailCrm\Test\TestCase;
+
+class ApiClientOrdersTest extends TestCase
+{
+    const FIRST_NAME = 'Иннокентий';
+
+    /**
+     * @group integration
+     */
+    public function testOrdersCreate()
+    {
+        $client = static::getApiClient();
+
+        $externalId = 'o-create-' . time();
+
+        $response = $client->ordersCreate(array(
+            'firstName' => self::FIRST_NAME,
+            'externalId' => $externalId,
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(201, $response->getStatusCode());
+        $this->assertTrue(is_int($response->getId()));
+
+        return array(
+            'id' => $response->getId(),
+            'externalId' => $externalId,
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersCreateExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersCreate(array());
+    }
+
+    /**
+     * @group integration
+     * @depends testOrdersCreate
+     */
+    public function testOrdersGet(array $ids)
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersGet(678678678);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(404, $response->getStatusCode());
+        $this->assertFalse($response->success);
+
+        $response = $client->ordersGet($ids['id'], 'id');
+        $orderById = $response->order;
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertTrue($response->success);
+        $this->assertEquals(self::FIRST_NAME, $response->order['firstName']);
+
+        $response = $client->ordersGet($ids['externalId'], 'externalId');
+        $this->assertEquals($orderById['id'], $response->order['id']);
+
+        return $ids;
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersGetException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersGet(678678678, 'asdf');
+    }
+
+    /**
+     * @group integration
+     * @depends testOrdersGet
+     */
+    public function testOrdersEdit(array $ids)
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersEdit(
+            array(
+                'id' => 22342134,
+                'lastName' => '12345',
+            ),
+            'id'
+        );
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(404, $response->getStatusCode());
+
+        $response = $client->ordersEdit(array(
+            'externalId' => $ids['externalId'],
+            'lastName' => '12345',
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertTrue($response->success);
+
+        $response = $client->ordersEdit(array(
+            'externalId' => time(),
+            'lastName' => '12345',
+        ));
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(201, $response->getStatusCode());
+        $this->assertTrue($response->success);
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersEditExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersEdit(array(), 'asdf');
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersEditException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersEdit(array('id' => 678678678), 'asdf');
+    }
+
+    /**
+     * @group integration
+     */
+    public function testOrdersHistory()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersHistory();
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertTrue($response->success);
+        $this->assertTrue(
+            isset($response['orders']),
+            'API returns orders history'
+        );
+        $this->assertTrue(
+            isset($response['generatedAt']),
+            'API returns generatedAt in orders history'
+        );
+    }
+
+    /**
+     * @group integration
+     */
+    public function testOrdersList()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersList();
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertTrue($response->isSuccessful());
+        $this->assertTrue(isset($response['orders']));
+
+        $response = $client->ordersList(array(), 1, 300);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertFalse(
+            $response->isSuccessful(),
+            'Pagination error'
+        );
+
+        $response = $client->ordersList(array('paymentStatus' => 'paid'), 1);
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'API returns orders list'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersFixExternalIdsException()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersFixExternalIds(array());
+    }
+
+    /**
+     * @group integration
+]     */
+    public function testOrdersFixExternalIds()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersCreate(array(
+            'firstName' => 'Aaa',
+        ));
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Order created'
+        );
+
+        $id = $response->id;
+        $externalId = 'asdf' . time();
+
+        $response = $client->ordersFixExternalIds(array(
+            array('id' => $id, 'externalId' => $externalId)
+        ));
+
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Fixed order ids'
+        );
+
+        $response = $client->ordersGet($externalId);
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Got order'
+        );
+        $this->assertEquals(
+            $id,
+            $response->order['id'],
+            'Fixing of order ids were right'
+        );
+        $this->assertEquals(
+            $externalId,
+            $response->order['externalId'],
+            'Fixing of order ids were right'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testOrdersUploadExceptionEmpty()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->ordersUpload(array());
+    }
+
+    /**
+     * @group integration
+     */
+    public function testOrdersUpload()
+    {
+        $client = static::getApiClient();
+
+        $externalIdA = 'upload-a-' . time();
+        $externalIdB = 'upload-b-' . time();
+
+        $response = $client->ordersUpload(array(
+            array(
+                'externalId' => $externalIdA,
+                'firstName' => 'Aaa',
+            ),
+            array(
+                'externalId' => $externalIdB,
+                'lastName' => 'Bbb',
+            ),
+        ));
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Got order'
+        );
+        $this->assertEquals(
+            $externalIdA,
+            $response->uploadedOrders[0]['externalId']
+        );
+        $this->assertEquals(
+            $externalIdB,
+            $response->uploadedOrders[1]['externalId']
+        );
+    }
+}
diff --git a/tests/RetailCrm/Tests/ApiClientReferenceTest.php b/tests/RetailCrm/Tests/ApiClientReferenceTest.php
new file mode 100644
index 0000000..95d0b72
--- /dev/null
+++ b/tests/RetailCrm/Tests/ApiClientReferenceTest.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace RetailCrm\Tests;
+
+use RetailCrm\Test\TestCase;
+
+class ApiClientReferenceTest extends TestCase
+{
+    /**
+     * @group integration
+     * @dataProvider getListDictionaries
+     */
+    public function testList($name)
+    {
+        $client = static::getApiClient();
+
+        $method = $name . 'List';
+        $response = $client->$method();
+
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertTrue($response->isSuccessful());
+        $this->assertTrue(isset($response[$name]));
+        $this->assertTrue(is_array($response[$name]));
+    }
+
+    /**
+     * @group integration
+     * @dataProvider getEditDictionaries
+     * @expectedException \InvalidArgumentException
+     */
+    public function testEditingException($name)
+    {
+        $client = static::getApiClient();
+
+        $method = $name . 'Edit';
+        $response = $client->$method(array());
+    }
+
+    /**
+     * @group integration
+     * @dataProvider getEditDictionaries
+     */
+    public function testEditing($name)
+    {
+        $client = static::getApiClient();
+
+        $code = 'dict-' . strtolower($name) . '-' . time();
+        $method = $name . 'Edit';
+        $params = array(
+            'code' => $code,
+            'name' => 'Aaa',
+        );
+        if ($name == 'statuses') {
+            $params['group'] = 'new';
+        }
+
+        $response = $client->$method($params);
+        $this->assertEquals(201, $response->getStatusCode());
+
+        $response = $client->$method(array(
+            'code' => $code,
+            'name' => 'Bbb',
+        ));
+        if ($response->getStatusCode() > 201) {
+            print_r($response);
+        }
+        $this->assertEquals(200, $response->getStatusCode());
+    }
+
+    public function getListDictionaries()
+    {
+        return array(
+            array('deliveryServices'),
+            array('deliveryTypes'),
+            array('orderMethods'),
+            array('orderTypes'),
+            array('paymentStatuses'),
+            array('paymentTypes'),
+            array('productStatuses'),
+            array('statusGroups'),
+            array('statuses'),
+        );
+    }
+
+    public function getEditDictionaries()
+    {
+        return array(
+            array('deliveryServices'),
+            array('deliveryTypes'),
+            array('orderMethods'),
+            array('orderTypes'),
+            array('paymentStatuses'),
+            array('paymentTypes'),
+            array('productStatuses'),
+            array('statuses'),
+        );
+    }
+}
diff --git a/tests/RetailCrm/Tests/ApiClientTest.php b/tests/RetailCrm/Tests/ApiClientTest.php
new file mode 100644
index 0000000..38b535c
--- /dev/null
+++ b/tests/RetailCrm/Tests/ApiClientTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace RetailCrm\Tests;
+
+use RetailCrm\Test\TestCase;
+
+class ApiClientTest extends TestCase
+{
+    /**
+     * @group unit
+     */
+    public function testConstruct()
+    {
+        $client = static::getApiClient();
+
+        $this->assertInstanceOf('RetailCrm\ApiClient', $client);
+    }
+
+    /**
+     * @group integration
+     */
+    public function testStatisticUpdate()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->statisticUpdate();
+        $this->assertTrue($response->isSuccessful());
+    }
+}
diff --git a/tests/RetailCrm/Tests/Http/ClientTest.php b/tests/RetailCrm/Tests/Http/ClientTest.php
new file mode 100644
index 0000000..6e46653
--- /dev/null
+++ b/tests/RetailCrm/Tests/Http/ClientTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace RetailCrm\Tests\Http;
+
+use RetailCrm\Test\TestCase;
+use RetailCrm\ApiClient;
+use RetailCrm\Http\Client;
+
+class ClientTest extends TestCase
+{
+    /**
+     * @group unit
+     */
+    public function testConstruct()
+    {
+        $client = new Client('https://asdf.df', array());
+
+        $this->assertInstanceOf('RetailCrm\Http\Client', $client);
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testHttpRequiring()
+    {
+        $client = new Client('http://a.intarocrm.ru', array('apiKey' => '123'));
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testMakeRequestWrongMethod()
+    {
+        $client = new Client('https://asdf.df', array());
+        $client->makeRequest('/a', 'adsf');
+    }
+
+    /**
+     * @group integration
+     * @expectedException RetailCrm\Exception\CurlException
+     */
+    public function testMakeRequestWrongUrl()
+    {
+        $client = new Client('https://asdf.df', array());
+        $client->makeRequest('/a', Client::METHOD_GET, array(), 1);
+    }
+
+    /**
+     * @group integration
+     */
+    public function testMakeRequestSuccess()
+    {
+        $client = new Client('https://demo.intarocrm.ru/api/' . ApiClient::VERSION, array());
+        $response = $client->makeRequest('/orders', Client::METHOD_GET);
+
+        $this->assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        $this->assertEquals(403, $response->getStatusCode());
+    }
+}
diff --git a/tests/RetailCrm/Tests/Response/ApiResponseTest.php b/tests/RetailCrm/Tests/Response/ApiResponseTest.php
new file mode 100644
index 0000000..fa70176
--- /dev/null
+++ b/tests/RetailCrm/Tests/Response/ApiResponseTest.php
@@ -0,0 +1,233 @@
+<?php
+
+namespace RetailCrm\Tests\Response;
+
+use RetailCrm\Test\TestCase;
+use RetailCrm\Response\ApiResponse;
+
+class ApiResponseTest extends TestCase
+{
+    /**
+     * @group unit
+     */
+    public function testSuccessConstruct()
+    {
+        $response = new ApiResponse(200);
+        $this->assertInstanceOf(
+            'RetailCrm\Response\ApiResponse',
+            $response,
+            'Response object created'
+        );
+
+        $response = new ApiResponse(201, '{ "success": true }');
+        $this->assertInstanceOf(
+            'RetailCrm\Response\ApiResponse',
+            $response,
+            'Response object created'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException RetailCrm\Exception\InvalidJsonException
+     */
+    public function testJsonInvalid()
+    {
+        $response = new ApiResponse(400, '{ "asdf": }');
+    }
+
+    /**
+     * @group unit
+     */
+    public function testStatusCodeGetting()
+    {
+        $response = new ApiResponse(200);
+        $this->assertEquals(
+            200,
+            $response->getStatusCode(),
+            'Response object returns the right status code'
+        );
+
+        $response = new ApiResponse(460, '{ "success": false }');
+        $this->assertEquals(
+            460,
+            $response->getStatusCode(),
+            'Response object returns the right status code'
+        );
+    }
+
+    /**
+     * @group unit
+     */
+    public function testIsSuccessful()
+    {
+        $response = new ApiResponse(200);
+        $this->assertTrue(
+            $response->isSuccessful(),
+            'Request was successful'
+        );
+
+        $response = new ApiResponse(460, '{ "success": false }');
+        $this->assertFalse(
+            $response->isSuccessful(),
+            'Request was failed'
+        );
+    }
+
+    /**
+     * @group unit
+     */
+    public function testMagicCall()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $this->assertEquals(
+            true,
+            $response->getSuccess(),
+            'Response object returns property value throw magic method'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testMagicCallException1()
+    {
+        $response = new ApiResponse(200);
+        $response->getSome();
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testMagicCallException2()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $response->getSomeSuccess();
+    }
+
+    /**
+     * @group unit
+     */
+    public function testMagicGet()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $this->assertEquals(
+            true,
+            $response->success,
+            'Response object returns property value throw magic get'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testMagicGetException1()
+    {
+        $response = new ApiResponse(200);
+        $response->some;
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testMagicGetException2()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $response->someSuccess;
+    }
+
+    /**
+     * @group unit
+     */
+    public function testArrayGet()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $this->assertEquals(
+            true,
+            $response['success'],
+            'Response object returns property value throw magic array get'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testArrayGetException1()
+    {
+        $response = new ApiResponse(200);
+        $response['some'];
+    }
+
+    /**
+     * @group unit
+     * @expectedException \InvalidArgumentException
+     */
+    public function testArrayGetException2()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $response['someSuccess'];
+    }
+
+    /**
+     * @group unit
+     */
+    public function testArrayIsset()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+
+        $this->assertTrue(
+            isset($response['success']),
+            'Response object returns property existing'
+        );
+
+        $this->assertFalse(
+            isset($response['suess']),
+            'Response object returns property existing'
+        );
+    }
+
+    /**
+     * @group unit
+     * @expectedException \BadMethodCallException
+     */
+    public function testArraySetException1()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $response['success'] = 'a';
+    }
+
+    /**
+     * @group unit
+     * @expectedException \BadMethodCallException
+     */
+    public function testArraySetException2()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        $response['sssssssuccess'] = 'a';
+    }
+
+    /**
+     * @group unit
+     * @expectedException \BadMethodCallException
+     */
+    public function testArrayUnsetException1()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        unset($response['success']);
+    }
+
+    /**
+     * @group unit
+     * @expectedException \BadMethodCallException
+     */
+    public function testArrayUnsetException2()
+    {
+        $response = new ApiResponse(201, '{ "success": true }');
+        unset($response['sssssssuccess']);
+    }
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..f1cd65b
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,4 @@
+<?php
+
+$loader = require dirname(__DIR__) . '/vendor/autoload.php';
+$loader->add('RetailCrm\\Test', __DIR__);