diff --git a/Resources/doc/index.md b/Resources/doc/index.md
index e69de29..3a1b787 100644
--- a/Resources/doc/index.md
+++ b/Resources/doc/index.md
@@ -0,0 +1,148 @@
+## Installation
+
+`composer require retailcrm/service-bundle`
+
+## Usage
+
+Enable bundle in `config/bundles.php`:
+
+```php
+<?php
+
+return [
+    // other bundles
+    RetailCrm\ServiceBundle\RetailCrmServiceBundle::class => ['all' => true]
+];
+
+```
+
+Create bundle config file in `config/packages/retail_crm_service.yaml`:
+
+```yaml
+retail_crm_service:
+  request_schema: ~
+```
+
+### Deserializing incoming requests
+
+#### Callbacks (form data)
+
+To automatically get the callback request parameter
+
+```php
+
+class AppController extends AbstractController
+{
+    public function activityAction(\App\Dto\Callback\Activity $activity): Response
+    {
+        // handle activity
+    }
+}
+
+```
+
+add to the config:
+
+```yaml
+retail_crm_service:
+      request_schema:
+            callback:
+                  - type: App\Dto\Callback\Activity
+                    params: ["activity"]
+```
+
+request automatically will be deserialization to $activity.
+
+#### Body json content
+
+```php
+
+class AppController extends AbstractController
+{
+    public function someAction(\App\Dto\Body $activity): Response
+    {
+        // handle activity
+    }
+}
+
+```
+
+add to the config:
+
+```yaml
+retail_crm_service:
+    request_schema:
+          client:
+            - App\Dto\Body
+```
+
+### Authentication
+
+Example security configuration:
+
+```yaml
+security:
+    providers:
+        client:
+            entity:
+                class: 'App\Entity\Connection' # must implements UserInterface
+                property: 'clientId'
+    firewalls:
+        api:
+            pattern: ^/api
+            provider: client
+            anonymous: ~
+            lazy: true
+            stateless: false
+            guard:
+                authenticators:
+                    - RetailCrm\ServiceBundle\Security\FrontApiClientAuthenticator
+        callback:
+            pattern: ^/callback
+            provider: client
+            anonymous: ~
+            lazy: true
+            stateless: true
+            guard:
+                authenticators:
+                    - RetailCrm\ServiceBundle\Security\CallbackClientAuthenticator
+        main:
+            anonymous: true
+            lazy: true
+
+    access_control:
+         - { path: ^/api/login, roles: IS_AUTHENTICATED_ANONYMOUSLY } # login for programmatically authentication user
+         - { path: ^/api, roles: ROLE_USER }
+         - { path: ^/callback, roles: ROLE_USER }
+```
+
+To authenticate the user after creating it, you can use the following code
+
+```php
+
+use Symfony\Component\Security\Guard\GuardAuthenticatorHandler;
+use RetailCrm\ServiceBundle\Security\FrontApiClientAuthenticator;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class AppController extends AbstractController
+{
+    public function someAction(
+        Request $request,
+        GuardAuthenticatorHandler $guardAuthenticatorHandler,
+        FrontApiClientAuthenticator $frontApiClientAuthenticator,
+        ConnectionManager $manager
+    ): Response {
+        $user = $manager->getUser(); // getting user
+
+        $guardAuthenticatorHandler->authenticateUserAndHandleSuccess(
+            $user,
+            $request,
+            $frontApiClientAuthenticator,
+            'api'
+        );
+        // ...
+    }
+}
+
+```
diff --git a/Tests/DependencyInjection/RetailCrmServiceExtensionTest.php b/Tests/DependencyInjection/RetailCrmServiceExtensionTest.php
new file mode 100644
index 0000000..471f198
--- /dev/null
+++ b/Tests/DependencyInjection/RetailCrmServiceExtensionTest.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace RetailCrm\ServiceBundle\Tests\DependencyInjection;
+
+use PHPUnit\Framework\TestCase;
+use RetailCrm\ServiceBundle\ArgumentResolver\CallbackValueResolver;
+use RetailCrm\ServiceBundle\ArgumentResolver\ClientValueResolver;
+use RetailCrm\ServiceBundle\DependencyInjection\RetailCrmServiceExtension;
+use RetailCrm\ServiceBundle\Response\ErrorJsonResponseFactory;
+use RetailCrm\ServiceBundle\Security\CallbackClientAuthenticator;
+use RetailCrm\ServiceBundle\Security\FrontApiClientAuthenticator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
+
+/**
+ * Class RetailCrmServiceExtensionTest
+ *
+ * @package RetailCrm\ServiceBundle\Tests\DependencyInjection
+ */
+class RetailCrmServiceExtensionTest extends TestCase
+{
+    private $container;
+
+    protected function setUp(): void
+    {
+        $container = new ContainerBuilder(new EnvPlaceholderParameterBag());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
+
+        $extension = new RetailCrmServiceExtension();
+        $extension->load(
+            [
+                [
+                    'request_schema' => []
+                ]
+            ],
+            $container
+        );
+
+        $container->compile();
+
+        $this->container = $container;
+    }
+
+    public function testLoad(): void
+    {
+        static::assertTrue($this->container->hasParameter('retail_crm_service.request_schema.callback'));
+        static::assertTrue($this->container->hasParameter('retail_crm_service.request_schema.client'));
+        static::assertTrue($this->container->hasDefinition(CallbackValueResolver::class));
+        static::assertTrue($this->container->hasDefinition(ClientValueResolver::class));
+        static::assertTrue($this->container->hasDefinition(ErrorJsonResponseFactory::class));
+        static::assertTrue($this->container->hasDefinition(CallbackClientAuthenticator::class));
+        static::assertTrue($this->container->hasDefinition(FrontApiClientAuthenticator::class));
+    }
+}
diff --git a/Tests/Response/ErrorJsonResponseFactoryTest.php b/Tests/Response/ErrorJsonResponseFactoryTest.php
new file mode 100644
index 0000000..e6d892e
--- /dev/null
+++ b/Tests/Response/ErrorJsonResponseFactoryTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace RetailCrm\ServiceBundle\Tests\Response;
+
+use PHPUnit\Framework\TestCase;
+use RetailCrm\ServiceBundle\Models\Error;
+use RetailCrm\ServiceBundle\Response\ErrorJsonResponseFactory;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Serializer\Encoder\JsonEncoder;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
+
+class ErrorJsonResponseFactoryTest extends TestCase
+{
+    private $serializer;
+
+    protected function setUp(): void
+    {
+        $this->serializer = new Serializer([new ObjectNormalizer()], [new JsonEncoder()]);
+    }
+
+    public function testCreate(): void
+    {
+        $factory = new ErrorJsonResponseFactory($this->serializer);
+        $error = new Error();
+        $error->message = 'Test error message';
+
+        $result = $factory->create($error);
+
+        static::assertInstanceOf(JsonResponse::class, $result);
+        static::assertEquals(Response::HTTP_BAD_REQUEST, $result->getStatusCode());
+        static::assertEquals('{"code":null,"message":"Test error message","details":null}', $result->getContent());
+    }
+}
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 8003dcf..ada38ee 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -11,6 +11,9 @@
          bootstrap="vendor/autoload.php"
 >
     <coverage>
+        <include>
+            <directory>./</directory>
+        </include>
         <exclude>
             <directory>./Tests</directory>
             <directory>./vendor</directory>