diff --git a/src/Client.php b/src/Client.php
index 58e5ff3..7d70962 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -18,6 +18,7 @@ use RetailCrm\Api\Interfaces\RequestTransformerInterface;
 use RetailCrm\Api\Interfaces\ResponseTransformerInterface;
 use RetailCrm\Api\ResourceGroup\Api;
 use RetailCrm\Api\ResourceGroup\Costs;
+use RetailCrm\Api\ResourceGroup\CustomerInteraction;
 use RetailCrm\Api\ResourceGroup\Customers;
 use RetailCrm\Api\ResourceGroup\CustomersCorporate;
 use RetailCrm\Api\ResourceGroup\CustomFields;
@@ -67,6 +68,9 @@ class Client
     /** @var \RetailCrm\Api\ResourceGroup\CustomFields */
     public $customFields;
 
+    /** @var \RetailCrm\Api\ResourceGroup\CustomerInteraction */
+    public $customerInteraction;
+
     /** @var \RetailCrm\Api\ResourceGroup\Customers */
     public $customers;
 
@@ -187,6 +191,14 @@ class Client
             $eventDispatcher,
             $logger
         );
+        $this->customerInteraction = new CustomerInteraction(
+            $url,
+            $httpClient,
+            $requestTransformer,
+            $responseTransformer,
+            $eventDispatcher,
+            $logger
+        );
         $this->customers = new Customers(
             $url,
             $httpClient,
diff --git a/src/Enum/BySite.php b/src/Enum/BySite.php
new file mode 100644
index 0000000..e4b887a
--- /dev/null
+++ b/src/Enum/BySite.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category BySite
+ * @package  RetailCrm\Api\Enum
+ */
+
+namespace RetailCrm\Api\Enum;
+
+/**
+ * Class BySite
+ *
+ * @category BySite
+ * @package  RetailCrm\Api\Enum
+ */
+final class BySite
+{
+    public const ID = 'id';
+    public const CODE = 'code';
+}
diff --git a/src/Model/Entity/CustomerInteraction/Cart.php b/src/Model/Entity/CustomerInteraction/Cart.php
new file mode 100644
index 0000000..6df22b5
--- /dev/null
+++ b/src/Model/Entity/CustomerInteraction/Cart.php
@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category Cart
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Entity\CustomerInteraction;
+
+use DateTime;
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+/**
+ * Class Cart
+ *
+ * @category Cart
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+class Cart
+{
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("currency")
+     */
+    public $currency;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("externalId")
+     */
+    public $externalId;
+
+    /**
+     * @var DateTime
+     *
+     * @JMS\Type("DateTime<'Y-m-d H:i:sP'>")
+     * @JMS\SerializedName("droppedAt")
+     */
+    public $droppedAt;
+
+    /**
+     * @var DateTime
+     *
+     * @JMS\Type("DateTime<'Y-m-d H:i:sP'>")
+     * @JMS\SerializedName("clearedAt")
+     */
+    public $clearedAt;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("link")
+     */
+    public $link;
+
+    /**
+     * @var \RetailCrm\Api\Model\Entity\CustomerInteraction\CartCustomer
+     *
+     * @JMS\Type("RetailCrm\Api\Model\Entity\CustomerInteraction\CartCustomer")
+     * @JMS\SerializedName("customer")
+     */
+    public $customer;
+
+    /**
+     * @var \RetailCrm\Api\Model\Entity\CustomerInteraction\CartItem[]
+     *
+     * @JMS\Type("array<RetailCrm\Api\Model\Entity\CustomerInteraction\CartItem>")
+     * @JMS\SerializedName("items")
+     */
+    public $items;
+
+    /**
+     * @var \RetailCrm\Api\Model\Entity\CustomerInteraction\CartOrder
+     *
+     * @JMS\Type("RetailCrm\Api\Model\Entity\CustomerInteraction\CartOrder")
+     * @JMS\SerializedName("order")
+     */
+    public $order;
+}
diff --git a/src/Model/Entity/CustomerInteraction/CartCustomer.php b/src/Model/Entity/CustomerInteraction/CartCustomer.php
new file mode 100644
index 0000000..f5079e3
--- /dev/null
+++ b/src/Model/Entity/CustomerInteraction/CartCustomer.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CartCustomer
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Entity\CustomerInteraction;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+/**
+ * Class CartCustomer
+ *
+ * @category CartCustomer
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+class CartCustomer
+{
+    /**
+     * @var int
+     *
+     * @JMS\Type("int")
+     * @JMS\SerializedName("id")
+     */
+    public $id;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("externalId")
+     */
+    public $externalId;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("browserId")
+     */
+    public $browserId;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("site")
+     */
+    public $site;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("gaClientId")
+     */
+    public $gaClientId;
+}
diff --git a/src/Model/Entity/CustomerInteraction/CartItem.php b/src/Model/Entity/CustomerInteraction/CartItem.php
new file mode 100644
index 0000000..8ca0623
--- /dev/null
+++ b/src/Model/Entity/CustomerInteraction/CartItem.php
@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CartItem
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Entity\CustomerInteraction;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+/**
+ * Class CartItem
+ *
+ * @category CartItem
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+class CartItem
+{
+    /**
+     * @var int
+     *
+     * @JMS\Type("int")
+     * @JMS\SerializedName("id")
+     */
+    public $id;
+
+    /**
+     * @var \RetailCrm\Api\Model\Entity\Orders\Items\Offer
+     *
+     * @JMS\Type("RetailCrm\Api\Model\Entity\Orders\Items\Offer")
+     * @JMS\SerializedName("offer")
+     */
+    public $offer;
+
+    /**
+     * @var float
+     *
+     * @JMS\Type("float")
+     * @JMS\SerializedName("quantity")
+     */
+    public $quantity;
+
+    /**
+     * @var float
+     *
+     * @JMS\Type("float")
+     * @JMS\SerializedName("price")
+     */
+    public $price;
+}
diff --git a/src/Model/Entity/CustomerInteraction/CartOrder.php b/src/Model/Entity/CustomerInteraction/CartOrder.php
new file mode 100644
index 0000000..1e6a9b9
--- /dev/null
+++ b/src/Model/Entity/CustomerInteraction/CartOrder.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CartOrder
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Entity\CustomerInteraction;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+
+/**
+ * Class CartOrder
+ *
+ * @category CartOrder
+ * @package  RetailCrm\Api\Model\Entity\CustomerInteraction
+ */
+class CartOrder
+{
+    /**
+     * @var int
+     *
+     * @JMS\Type("int")
+     * @JMS\SerializedName("id")
+     */
+    public $id;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("externalId")
+     */
+    public $externalId;
+
+    /**
+     * @var string
+     *
+     * @JMS\Type("string")
+     * @JMS\SerializedName("number")
+     */
+    public $number;
+}
diff --git a/src/Model/Request/ByAndSiteByRequest.php b/src/Model/Request/ByAndSiteByRequest.php
new file mode 100644
index 0000000..2b48d52
--- /dev/null
+++ b/src/Model/Request/ByAndSiteByRequest.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category ByAndSiteByRequest
+ * @package  RetailCrm\Api\Model\Request
+ */
+
+namespace RetailCrm\Api\Model\Request;
+
+use RetailCrm\Api\Component\FormData\Mapping as Form;
+use RetailCrm\Api\Interfaces\RequestInterface;
+
+/**
+ * Class ByAndSiteByRequest
+ *
+ * @category ByAndSiteByRequest
+ * @package  RetailCrm\Api\Model\Request
+ */
+class ByAndSiteByRequest implements RequestInterface
+{
+    /**
+     * @var string
+     *
+     * @Form\Type("string")
+     * @Form\SerializedName("by")
+     */
+    public $by;
+
+    /**
+     * @var string
+     *
+     * @Form\Type("string")
+     * @Form\SerializedName("siteBy")
+     */
+    public $siteBy;
+
+    /**
+     * BySiteRequest constructor.
+     *
+     * @param string $by
+     * @param string $siteBy
+     */
+    public function __construct(string $by = '', string $siteBy = '')
+    {
+        if ('' !== $by) {
+            $this->by   = $by;
+        }
+
+        if ('' !== $siteBy) {
+            $this->siteBy = $siteBy;
+        }
+    }
+}
diff --git a/src/Model/Request/CustomerInteraction/CustomerInteractionCartClearRequest.php b/src/Model/Request/CustomerInteraction/CustomerInteractionCartClearRequest.php
new file mode 100644
index 0000000..3534af1
--- /dev/null
+++ b/src/Model/Request/CustomerInteraction/CustomerInteractionCartClearRequest.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CustomerInteractionCartClearRequest
+ * @package  RetailCrm\Api\Model\Request\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Request\CustomerInteraction;
+
+use RetailCrm\Api\Component\FormData\Mapping as Form;
+use RetailCrm\Api\Interfaces\RequestInterface;
+
+/**
+ * Class CustomerInteractionCartClearRequest
+ *
+ * @category CustomerInteractionCartClearRequest
+ * @package  RetailCrm\Api\Model\Request\CustomerInteraction
+ */
+class CustomerInteractionCartClearRequest implements RequestInterface
+{
+    /**
+     * @var string
+     *
+     * @Form\Type("string")
+     * @Form\SerializedName("siteBy")
+     */
+    public $siteBy;
+
+    /**
+     * @var \RetailCrm\Api\Model\Entity\CustomerInteraction\Cart
+     *
+     * @Form\Type("RetailCrm\Api\Model\Entity\CustomerInteraction\Cart")
+     * @Form\SerializedName("cart")
+     * @Form\JsonField()
+     */
+    public $cart;
+}
diff --git a/src/Model/Request/CustomerInteraction/CustomerInteractionCartSetRequest.php b/src/Model/Request/CustomerInteraction/CustomerInteractionCartSetRequest.php
new file mode 100644
index 0000000..be15dca
--- /dev/null
+++ b/src/Model/Request/CustomerInteraction/CustomerInteractionCartSetRequest.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CustomerInteractionCartSetRequest
+ * @package  RetailCrm\Api\Model\Request\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Request\CustomerInteraction;
+
+/**
+ * Class CustomerInteractionCartSetRequest
+ *
+ * @category CustomerInteractionCartSetRequest
+ * @package  RetailCrm\Api\Model\Request\CustomerInteraction
+ */
+class CustomerInteractionCartSetRequest extends CustomerInteractionCartClearRequest
+{
+}
diff --git a/src/Model/Response/CustomerInteraction/CustomerInteractionCartGetResponse.php b/src/Model/Response/CustomerInteraction/CustomerInteractionCartGetResponse.php
new file mode 100644
index 0000000..c63f50e
--- /dev/null
+++ b/src/Model/Response/CustomerInteraction/CustomerInteractionCartGetResponse.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CustomerInteractionCartGetResponse
+ * @package  RetailCrm\Api\Model\Response\CustomerInteraction
+ */
+
+namespace RetailCrm\Api\Model\Response\CustomerInteraction;
+
+use RetailCrm\Api\Component\Serializer\Annotation as JMS;
+use RetailCrm\Api\Model\Response\SuccessResponse;
+
+/**
+ * Class CustomerInteractionCartGetResponse
+ *
+ * @category CustomerInteractionCartGetResponse
+ * @package  RetailCrm\Api\Model\Response\CustomerInteraction
+ */
+class CustomerInteractionCartGetResponse extends SuccessResponse
+{
+    /**
+     * @var \RetailCrm\Api\Model\Entity\CustomerInteraction\Cart
+     *
+     * @JMS\Type("RetailCrm\Api\Model\Entity\CustomerInteraction\Cart")
+     * @JMS\SerializedName("cart")
+     */
+    public $cart;
+}
diff --git a/src/ResourceGroup/CustomerInteraction.php b/src/ResourceGroup/CustomerInteraction.php
new file mode 100644
index 0000000..871feb1
--- /dev/null
+++ b/src/ResourceGroup/CustomerInteraction.php
@@ -0,0 +1,238 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category CustomerInteraction
+ * @package  RetailCrm\Api\ResourceGroup
+ */
+
+namespace RetailCrm\Api\ResourceGroup;
+
+use RetailCrm\Api\Enum\RequestMethod;
+use RetailCrm\Api\Model\Request\ByAndSiteByRequest;
+use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartClearRequest;
+use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartSetRequest;
+use RetailCrm\Api\Model\Response\CustomerInteraction\CustomerInteractionCartGetResponse;
+use RetailCrm\Api\Model\Response\SuccessResponse;
+
+/**
+ * Class CustomerInteraction
+ *
+ * @category CustomerInteraction
+ * @package  RetailCrm\Api\ResourceGroup
+ *
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
+ */
+class CustomerInteraction extends AbstractApiResourceGroup
+{
+    /**
+     * Makes POST "/api/v5/customer-interaction/{site}/cart/clear" request.
+     *
+     * Example:
+     * ```php
+     * use RetailCrm\Api\Enum\BySite;
+     * use RetailCrm\Api\Factory\SimpleClientFactory;
+     * use RetailCrm\Api\Interfaces\ApiExceptionInterface;
+     * use RetailCrm\Api\Model\Entity\CustomerInteraction\Cart;
+     * use RetailCrm\Api\Model\Entity\CustomerInteraction\CartCustomer;
+     * use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartClearRequest;
+     *
+     * $client = SimpleClientFactory::createClient('https://test.retailcrm.pro', 'apiKey');
+     *
+     * $cart                       = new Cart();
+     * $cart->clearedAt            = new DateTime('now');
+     * $cart->customer             = new CartCustomer();
+     * $cart->customer->id         = 4770;
+     * $cart->customer->browserId  = 'browserId';
+     * $cart->customer->gaClientId = 'gaClientId';
+     *
+     * $request         = new CustomerInteractionCartClearRequest();
+     * $request->cart   = $cart;
+     * $request->siteBy = BySite::CODE;
+     *
+     * try {
+     *     $response = $client->customerInteraction->cartClear('testSite', $request);
+     * } catch (ApiExceptionInterface $exception) {
+     *     echo sprintf(
+     *         'Error from RetailCRM API (status code: %d): %s',
+     *         $exception->getStatusCode(),
+     *         $exception->getMessage()
+     *     );
+     *
+     *     if (count($exception->getErrorResponse()->errors) > 0) {
+     *         echo PHP_EOL . 'Errors: ' . implode(', ', $exception->getErrorResponse()->errors);
+     *     }
+     *
+     *     return;
+     * }
+     * ```
+     *
+     * @param \RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartClearRequest $request
+     * @param string|int $site
+     *
+     * @return \RetailCrm\Api\Model\Response\SuccessResponse
+     * @throws \RetailCrm\Api\Interfaces\ApiExceptionInterface
+     * @throws \RetailCrm\Api\Interfaces\ClientExceptionInterface
+     * @throws \RetailCrm\Api\Exception\Api\AccountDoesNotExistException
+     * @throws \RetailCrm\Api\Exception\Api\ApiErrorException
+     * @throws \RetailCrm\Api\Exception\Api\MissingCredentialsException
+     * @throws \RetailCrm\Api\Exception\Api\MissingParameterException
+     * @throws \RetailCrm\Api\Exception\Api\ValidationException
+     * @throws \RetailCrm\Api\Exception\Client\HandlerException
+     * @throws \RetailCrm\Api\Exception\Client\HttpClientException
+     */
+    public function cartClear(CustomerInteractionCartClearRequest $request, $site): SuccessResponse
+    {
+        /** @var SuccessResponse $response */
+        $response = $this->sendRequest(
+            RequestMethod::POST,
+            'customer-interaction/' . $site . '/cart/clear',
+            $request,
+            SuccessResponse::class
+        );
+        return $response;
+    }
+
+    /**
+     * Makes POST "/api/v5/customer-interaction/{site}/cart/set" request.
+     *
+     * Example:
+     * ```php
+     * use RetailCrm\Api\Enum\BySite;
+     * use RetailCrm\Api\Factory\SimpleClientFactory;
+     * use RetailCrm\Api\Interfaces\ApiExceptionInterface;
+     * use RetailCrm\Api\Model\Entity\CustomerInteraction\Cart;
+     * use RetailCrm\Api\Model\Entity\CustomerInteraction\CartCustomer;
+     * use RetailCrm\Api\Model\Entity\CustomerInteraction\CartItem;
+     * use RetailCrm\Api\Model\Entity\Orders\Items\Offer;
+     * use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartSetRequest;
+     *
+     * $client = SimpleClientFactory::createClient('https://test.retailcrm.pro', 'apiKey');
+     *
+     * $customer     = new CartCustomer();
+     * $customer->id = 4770;
+     *
+     * $cartItem                    = new CartItem();
+     * $cartItem->price             = 24.99;
+     * $cartItem->quantity          = 2;
+     * $cartItem->offer             = new Offer();
+     * $cartItem->offer->externalId = '47701234567890';
+     *
+     * $cart           = new Cart();
+     * $cart->items[]  = $cartItem;
+     * $cart->customer = $customer;
+     *
+     * $request         = new CustomerInteractionCartSetRequest();
+     * $request->cart   = $cart;
+     * $request->siteBy = BySite::CODE;
+     *
+     *  try {
+     *      $response = $client->customerInteraction->cartSet('testSite', $request);
+     *  } catch (ApiExceptionInterface $exception) {
+     *     echo sprintf(
+     *         'Error from RetailCRM API (status code: %d): %s',
+     *         $exception->getStatusCode(),
+     *         $exception->getMessage()
+     *     );
+     *
+     *     if (count($exception->getErrorResponse()->errors) > 0) {
+     *         echo PHP_EOL . 'Errors: ' . implode(', ', $exception->getErrorResponse()->errors);
+     *     }
+     *
+     *     return;
+     * }
+     * ```
+     *
+     * @param \RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartSetRequest $request
+     * @param string|int $site
+     *
+     * @return \RetailCrm\Api\Model\Response\SuccessResponse
+     * @throws \RetailCrm\Api\Interfaces\ApiExceptionInterface
+     * @throws \RetailCrm\Api\Interfaces\ClientExceptionInterface
+     * @throws \RetailCrm\Api\Exception\Api\AccountDoesNotExistException
+     * @throws \RetailCrm\Api\Exception\Api\ApiErrorException
+     * @throws \RetailCrm\Api\Exception\Api\MissingCredentialsException
+     * @throws \RetailCrm\Api\Exception\Api\MissingParameterException
+     * @throws \RetailCrm\Api\Exception\Api\ValidationException
+     * @throws \RetailCrm\Api\Exception\Client\HandlerException
+     * @throws \RetailCrm\Api\Exception\Client\HttpClientException
+     */
+    public function cartSet(CustomerInteractionCartSetRequest $request, $site): SuccessResponse
+    {
+        /** @var SuccessResponse $response */
+        $response = $this->sendRequest(
+            RequestMethod::POST,
+            'customer-interaction/' . $site . '/cart/set',
+            $request,
+            SuccessResponse::class
+        );
+        return $response;
+    }
+
+    /**
+     * Makes GET "/api/v5/customer-interaction/{site}/cart/{customerId}" request.
+     *
+     * Example:
+     * ```php
+     * use RetailCrm\Api\Enum\ByIdentifier;
+     * use RetailCrm\Api\Enum\BySite;
+     * use RetailCrm\Api\Factory\SimpleClientFactory;
+     * use RetailCrm\Api\Interfaces\ApiExceptionInterface;
+     * use RetailCrm\Api\Model\Request\ByAndSiteByRequest;
+     *
+     * $client = SimpleClientFactory::createClient('https://test.retailcrm.pro', 'apiKey');
+     *
+     * try {
+     *     $response = $client->customerInteraction->cartGet(
+     *         'testSite',
+     *         4200,
+     *         new ByAndSiteByRequest(ByIdentifier::ID, BySite::CODE)
+     *     );
+     * } catch (ApiExceptionInterface $exception) {
+     *     echo sprintf(
+     *         'Error from RetailCRM API (status code: %d): %s',
+     *         $exception->getStatusCode(),
+     *         $exception->getMessage()
+     *     );
+     *
+     *     if (count($exception->getErrorResponse()->errors) > 0) {
+     *         echo PHP_EOL . 'Errors: ' . implode(', ', $exception->getErrorResponse()->errors);
+     *     }
+     *
+     *     return;
+     * }
+     *
+     * echo 'Cart: ' . print_r($response->cart, true);
+     * ```
+     *
+     * @param string|int                                           $site
+     * @param string|int                                           $customerId
+     * @param \RetailCrm\Api\Model\Request\ByAndSiteByRequest|null $request
+     *
+     * @return \RetailCrm\Api\Model\Response\CustomerInteraction\CustomerInteractionCartGetResponse
+     * @throws \RetailCrm\Api\Interfaces\ApiExceptionInterface
+     * @throws \RetailCrm\Api\Interfaces\ClientExceptionInterface
+     * @throws \RetailCrm\Api\Exception\Api\AccountDoesNotExistException
+     * @throws \RetailCrm\Api\Exception\Api\ApiErrorException
+     * @throws \RetailCrm\Api\Exception\Api\MissingCredentialsException
+     * @throws \RetailCrm\Api\Exception\Api\MissingParameterException
+     * @throws \RetailCrm\Api\Exception\Api\ValidationException
+     * @throws \RetailCrm\Api\Exception\Client\HandlerException
+     * @throws \RetailCrm\Api\Exception\Client\HttpClientException
+     */
+    public function cartGet(
+        $site,
+        $customerId,
+        ?ByAndSiteByRequest $request = null
+    ): CustomerInteractionCartGetResponse {
+        /** @var CustomerInteractionCartGetResponse $response */
+        $response = $this->sendRequest(
+            RequestMethod::GET,
+            'customer-interaction/' . $site . '/cart/' . $customerId,
+            $request,
+            CustomerInteractionCartGetResponse::class
+        );
+        return $response;
+    }
+}
diff --git a/tests/src/ResourceGroup/CustomerInteractionTest.php b/tests/src/ResourceGroup/CustomerInteractionTest.php
new file mode 100644
index 0000000..69193cd
--- /dev/null
+++ b/tests/src/ResourceGroup/CustomerInteractionTest.php
@@ -0,0 +1,138 @@
+<?php
+
+namespace RetailCrm\Tests\ResourceGroup;
+
+use DateTime;
+use RetailCrm\Api\Enum\ByIdentifier;
+use RetailCrm\Api\Enum\BySite;
+use RetailCrm\Api\Enum\RequestMethod;
+use RetailCrm\Api\Model\Entity\CustomerInteraction\Cart;
+use RetailCrm\Api\Model\Entity\CustomerInteraction\CartCustomer;
+use RetailCrm\Api\Model\Entity\CustomerInteraction\CartItem;
+use RetailCrm\Api\Model\Entity\Orders\Items\Offer;
+use RetailCrm\Api\Model\Request\ByAndSiteByRequest;
+use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartClearRequest;
+use RetailCrm\Api\Model\Request\CustomerInteraction\CustomerInteractionCartSetRequest;
+use RetailCrm\TestUtils\Factory\TestClientFactory;
+use RetailCrm\TestUtils\TestCase\AbstractApiResourceGroupTestCase;
+
+class CustomerInteractionTest extends AbstractApiResourceGroupTestCase
+{
+    public static function testCustomerInteractionCartClear(): void
+    {
+        $json = <<<'EOF'
+{
+  "success": true
+}
+EOF;
+
+        $cart                       = new Cart();
+        $cart->clearedAt            = new DateTime('now');
+        $cart->customer             = new CartCustomer();
+        $cart->customer->id         = 4770;
+        $cart->customer->browserId  = 'browserId';
+        $cart->customer->gaClientId = 'gaClientId';
+
+        $request         = new CustomerInteractionCartClearRequest();
+        $request->cart   = $cart;
+        $request->siteBy = BySite::CODE;
+
+        $mock = static::createApiMockBuilder('customer-interaction/testSite/cart/clear');
+        $mock->matchMethod(RequestMethod::POST)
+            ->matchPath('/api/v5/customer-interaction/testSite/cart/clear')
+            ->matchBody(static::encodeForm($request))
+            ->reply(200)
+            ->withBody($json);
+
+        $client   = TestClientFactory::createClient($mock->getClient());
+        $response = $client->customerInteraction->cartClear($request, 'testSite');
+
+        self::assertModelEqualsToResponse($json, $response);
+    }
+
+    public static function testCustomerInteractionCartSet(): void
+    {
+        $json = <<<'EOF'
+{
+  "success": true
+}
+EOF;
+
+        $customer     = new CartCustomer();
+        $customer->id = 4770;
+
+        $cartItem                    = new CartItem();
+        $cartItem->price             = 24.99;
+        $cartItem->quantity          = 2;
+        $cartItem->offer             = new Offer();
+        $cartItem->offer->externalId = '47701234567890';
+
+        $cart           = new Cart();
+        $cart->items[]  = $cartItem;
+        $cart->customer = $customer;
+
+        $request         = new CustomerInteractionCartSetRequest();
+        $request->cart   = $cart;
+        $request->siteBy = BySite::CODE;
+
+        $mock = static::createApiMockBuilder('customer-interaction/testSite/cart/set');
+        $mock->matchMethod(RequestMethod::POST)
+            ->matchPath('/api/v5/customer-interaction/testSite/cart/set')
+            ->matchBody(static::encodeForm($request))
+            ->reply(200)
+            ->withBody($json);
+
+        $client   = TestClientFactory::createClient($mock->getClient());
+        $response = $client->customerInteraction->cartSet($request, 'testSite');
+
+        self::assertModelEqualsToResponse($json, $response);
+    }
+
+    public static function testCustomerInteractionCartGet(): void
+    {
+        $json = <<<'EOF'
+{
+  "success": true,
+  "cart": {
+    "externalId": "12345678901234",
+    "droppedAt": "2024-05-08 15:10:30-05:00",
+    "link": "https:/shop.myshopify.com/recover?key=1234",
+    "items": [
+      {
+        "id": "1",
+        "offer": {
+          "displayName": "Some sample product",
+          "id": 11,
+          "externalId": "01234567890123",
+          "name": "Some sample product",
+          "vatRate": "20.00",
+          "properties": [],
+          "unit": {
+            "code": "pc",
+            "name": "Piece",
+            "sym": "pc"
+          }
+        },
+        "quantity": 2,
+        "price": 24.99
+      }
+    ],
+    "currency": "EUR"
+  }
+}
+EOF;
+        $request = new ByAndSiteByRequest(ByIdentifier::ID, BySite::CODE);
+
+        $mock = static::createApiMockBuilder('customer-interaction/testSite/cart/4770');
+        $mock->matchMethod(RequestMethod::GET)
+            ->matchPath('/api/v5/customer-interaction/testSite/cart/4770')
+            ->matchQuery(static::encodeFormArray($request))
+            ->reply(200)
+            ->withBody($json);
+
+        $client   = TestClientFactory::createClient($mock->getClient());
+        $response = $client->customerInteraction->cartGet('testSite', 4770, $request);
+
+        self::assertModelEqualsToResponse($json, $response);
+    }
+}