diff --git a/lib/RetailCrm/Client/AbstractLoader.php b/lib/RetailCrm/Client/AbstractLoader.php
old mode 100644
new mode 100755
index 08613cd..98592b8
--- a/lib/RetailCrm/Client/AbstractLoader.php
+++ b/lib/RetailCrm/Client/AbstractLoader.php
@@ -31,6 +31,7 @@ abstract class AbstractLoader
 {
     protected $siteCode;
     protected $client;
+    protected $crmUrl;
 
     /**
      * Init version based client
@@ -45,6 +46,7 @@ abstract class AbstractLoader
         if ('/' !== $url[strlen($url) - 1]) {
             $url .= '/';
         }
+        $this->crmUrl = $url;
 
         if (empty($version) || !in_array($version, ['v3', 'v4', 'v5'])) {
             throw new \InvalidArgumentException(
@@ -128,5 +130,33 @@ abstract class AbstractLoader
         return $this->siteCode;
     }
 
+    /**
+     * Getting the list of available api versions
+     *
+     * @return \RetailCrm\Response\ApiResponse
+     */
+    public function availableVersions()
+    {
+        return $this->client->makeRequest(
+            $this->crmUrl . 'api/api-versions',
+            "GET",
+            [],
+            true
+        );
+    }
 
+    /**
+     * Getting the list of available api methods and stores for current key
+     *
+     * @return \RetailCrm\Response\ApiResponse
+     */
+    public function credentials()
+    {
+        return $this->client->makeRequest(
+            $this->crmUrl . 'api/credentials',
+            "GET",
+            [],
+            true
+        );
+    }
 }
diff --git a/lib/RetailCrm/Http/Client.php b/lib/RetailCrm/Http/Client.php
old mode 100644
new mode 100755
index 13cf46e..5939c51
--- a/lib/RetailCrm/Http/Client.php
+++ b/lib/RetailCrm/Http/Client.php
@@ -63,6 +63,7 @@ class Client
      * @param string $path       request url
      * @param string $method     (default: 'GET')
      * @param array  $parameters (default: array())
+     * @param bool $fullPath (default: false)
      *
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      *
@@ -75,7 +76,8 @@ class Client
     public function makeRequest(
         $path,
         $method,
-        array $parameters = []
+        array $parameters = [],
+        $fullPath = false
     ) {
         $allowedMethods = [self::METHOD_GET, self::METHOD_POST];
 
@@ -91,7 +93,7 @@ class Client
 
         $parameters = array_merge($this->defaultParameters, $parameters);
 
-        $url = $this->url . $path;
+        $url = $fullPath ? $path : $this->url . $path;
 
         if (self::METHOD_GET === $method && count($parameters)) {
             $url .= '?' . http_build_query($parameters, '', '&');
diff --git a/tests/RetailCrm/Tests/Methods/CommonMethodsTest.php b/tests/RetailCrm/Tests/Methods/CommonMethodsTest.php
new file mode 100755
index 0000000..4248cbc
--- /dev/null
+++ b/tests/RetailCrm/Tests/Methods/CommonMethodsTest.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * PHP version 5.4
+ *
+ * API client customers test class
+ *
+ * @category RetailCrm
+ * @package  RetailCrm
+ * @author   RetailCrm <integration@retailcrm.ru>
+ * @license  https://opensource.org/licenses/MIT MIT License
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion5
+ */
+
+namespace RetailCrm\Tests\Methods;
+
+use RetailCrm\Test\TestCase;
+
+/**
+ * Class CommonMethodsTest
+ *
+ * @category RetailCrm
+ * @package  RetailCrm
+ * @author   RetailCrm <integration@retailcrm.ru>
+ * @license  https://opensource.org/licenses/MIT MIT License
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion5
+ */
+class CommonMethodsTest extends TestCase
+{
+    /**
+     * @group api_methods
+     */
+    public function testAvailableVersions()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->request->availableVersions();
+
+        static::assertEquals(200, $response->getStatusCode());
+        static::assertTrue($response->getSuccess());
+        static::assertGreaterThan(0, count($response->getVersions()));
+    }
+
+    /**
+     * @group api_methods
+     */
+    public function testCredentials()
+    {
+        $client = static::getApiClient();
+
+        $response = $client->request->credentials();
+
+        static::assertEquals(200, $response->getStatusCode());
+        static::assertTrue($response->getSuccess());
+        static::assertGreaterThan(0, count($response->getCredentials()));
+    }
+}