diff --git a/src/Component/SimpleConnection/RequestVerifier.php b/src/Component/SimpleConnection/RequestVerifier.php
new file mode 100644
index 0000000..81a5819
--- /dev/null
+++ b/src/Component/SimpleConnection/RequestVerifier.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace RetailCrm\Api\Component\SimpleConnection;
+
+use RetailCrm\Api\Model\Callback\Entity\SimpleConnection\RequestProperty\RequestConnectionRegister;
+
+class RequestVerifier
+{
+    public function verify(string $secret, RequestConnectionRegister $registerRequest): bool
+    {
+        $hash = TokenCreator::create($registerRequest->apiKey, $secret);
+
+        return hash_equals($hash, $registerRequest->token);
+    }
+}
diff --git a/src/Component/SimpleConnection/TokenCreator.php b/src/Component/SimpleConnection/TokenCreator.php
new file mode 100644
index 0000000..2545c34
--- /dev/null
+++ b/src/Component/SimpleConnection/TokenCreator.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace RetailCrm\Api\Component\SimpleConnection;
+
+class TokenCreator
+{
+    public const ALGO = 'sha256';
+
+    public static function create(string $apiKey, string $secret): string
+    {
+        return hash_hmac(self::ALGO, $apiKey, $secret);
+    }
+}
diff --git a/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegister.php b/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegister.php
new file mode 100644
index 0000000..aac333a
--- /dev/null
+++ b/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegister.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace RetailCrm\Api\Model\Callback\Entity\SimpleConnection\RequestProperty;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+class RequestConnectionRegister
+{
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("systemUrl")
+     */
+    public $systemUrl;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("apiKey")
+     */
+    public $apiKey;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("token")
+     */
+    public $token;
+}
diff --git a/src/Model/Callback/Response/SimpleConnection/ConnectionConfigResponse.php b/src/Model/Callback/Response/SimpleConnection/ConnectionConfigResponse.php
new file mode 100644
index 0000000..60e1a7a
--- /dev/null
+++ b/src/Model/Callback/Response/SimpleConnection/ConnectionConfigResponse.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace RetailCrm\Api\Model\Callback\Response\SimpleConnection;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+class ConnectionConfigResponse
+{
+    /**
+     * @var bool
+     *
+     * @JMS\Type("bool")
+     * @JMS\SerializedName("success")
+     */
+    public $success;
+
+    /**
+     * @var string[]
+     *
+     * @JMS\Type("array")
+     * @JMS\SerializedName("scopes")
+     */
+    public $scopes;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("registerUrl")
+     */
+    public $registerUrl;
+}
diff --git a/src/Model/Callback/Response/SimpleConnection/ConnectionRegisterResponse.php b/src/Model/Callback/Response/SimpleConnection/ConnectionRegisterResponse.php
new file mode 100644
index 0000000..9869fde
--- /dev/null
+++ b/src/Model/Callback/Response/SimpleConnection/ConnectionRegisterResponse.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace RetailCrm\Api\Model\Callback\Response\SimpleConnection;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+class ConnectionRegisterResponse
+{
+    /**
+     * @var bool
+     *
+     * @JMS\Type("bool")
+     * @JMS\SerializedName("success")
+     */
+    public $success;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("accountUrl")
+     */
+    public $accountUrl;
+}
diff --git a/tests/src/Component/SimpleConnection/RequestVerifierTest.php b/tests/src/Component/SimpleConnection/RequestVerifierTest.php
new file mode 100644
index 0000000..02a41bd
--- /dev/null
+++ b/tests/src/Component/SimpleConnection/RequestVerifierTest.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace RetailCrm\Tests\Component\SimpleConnection;
+
+use PHPUnit\Framework\TestCase;
+use RetailCrm\Api\Component\SimpleConnection\RequestVerifier;
+use RetailCrm\Api\Model\Callback\Entity\SimpleConnection\RequestProperty\RequestConnectionRegister;
+
+class RequestVerifierTest extends TestCase
+{
+    public function testVerify(): void
+    {
+        $secret = 'secret';
+        $apiKey = 'api_key';
+        $token = hash_hmac('sha256', $apiKey, $secret);
+
+        $verifier = new RequestVerifier();
+        $request = new RequestConnectionRegister();
+
+        $request->systemUrl = 'url';
+        $request->apiKey = $apiKey;
+        $request->token = $token;
+
+        static::assertTrue($verifier->verify($secret, $request));
+    }
+}
diff --git a/tests/src/Component/SimpleConnection/TokenCreatorTest.php b/tests/src/Component/SimpleConnection/TokenCreatorTest.php
new file mode 100644
index 0000000..d9f2e1a
--- /dev/null
+++ b/tests/src/Component/SimpleConnection/TokenCreatorTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace RetailCrm\Tests\Component\SimpleConnection;
+
+use PHPUnit\Framework\TestCase;
+use RetailCrm\Api\Component\SimpleConnection\TokenCreator;
+
+class TokenCreatorTest extends TestCase
+{
+    public function testCreate(): void
+    {
+        $secret = 'secret';
+        $apiKey = 'api_key';
+
+        $hash = hash_hmac('sha256', $apiKey, $secret);
+
+        static::assertEquals($hash, TokenCreator::create($apiKey, $secret));
+    }
+}
diff --git a/tests/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegisterTest.php b/tests/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegisterTest.php
new file mode 100644
index 0000000..08f5143
--- /dev/null
+++ b/tests/src/Model/Callback/Entity/SimpleConnection/RequestProperty/RequestConnectionRegisterTest.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace RetailCrm\Tests\Model\Callback\Entity\SimpleConnection\RequestProperty;
+
+use PHPUnit\Framework\TestCase;
+use RetailCrm\Api\Factory\SerializerFactory;
+use RetailCrm\Api\Model\Callback\Entity\SimpleConnection\RequestProperty\RequestConnectionRegister;
+
+class RequestConnectionRegisterTest extends TestCase
+{
+    public function testDeserialize(): void
+    {
+        $requestData = [
+            'systemUrl' => 'test_url',
+            'apiKey' => 'test_key',
+            'token' => 'token'
+        ];
+
+        /** @var RequestConnectionRegister $request */
+        $request = SerializerFactory::create()->fromArray($requestData, RequestConnectionRegister::class);
+
+        static::assertEquals($requestData['systemUrl'], $request->systemUrl);
+        static::assertEquals($requestData['apiKey'], $request->apiKey);
+        static::assertEquals($requestData['token'], $request->token);
+    }
+}