diff --git a/Model/ApiFacade/OpenApi.php b/Model/ApiFacade/OpenApi.php
index 78d0b0b..8b97662 100755
--- a/Model/ApiFacade/OpenApi.php
+++ b/Model/ApiFacade/OpenApi.php
@@ -35,9 +35,10 @@ public function makeRefund(InfoInterface $payment, float $amount): array
     public function channels(): array
     {
         $result = $this->transactions()->getChannels();
+        $channels = [];
 
-        return array_map(function (array $channel) {
-            return new Channel(
+        foreach ($result['channels'] ?? [] as $channel) {
+            $channels[$channel['id']] = new Channel(
                 $channel['id'],
                 $channel['name'],
                 $channel['fullName'],
@@ -48,7 +49,9 @@ public function channels(): array
                 $channel['groups'],
                 $channel['constraints']
             );
-        }, $result['channels'] ?? []);
+        }
+
+        return $channels;
     }
 
     private function handleDataStructure(array $data): array
diff --git a/Model/ApiFacade/Transaction/TransactionApiFacade.php b/Model/ApiFacade/Transaction/TransactionApiFacade.php
index 1281c43..377cae1 100755
--- a/Model/ApiFacade/Transaction/TransactionApiFacade.php
+++ b/Model/ApiFacade/Transaction/TransactionApiFacade.php
@@ -71,7 +71,7 @@ public function channels(): array
         }
 
         $channels = array_filter($this->openApi->channels(), function (Channel $channel) {
-            return true === $channel->available && true === empty($channel->constraints);
+            return true === $channel->available;
         });
 
         $this->cache->save(serialize($channels), self::CHANNELS_CACHE_KEY, [], self::CACHE_LIFETIME);
diff --git a/Model/ConstraintValidator.php b/Model/ConstraintValidator.php
new file mode 100644
index 0000000..d0a4949
--- /dev/null
+++ b/Model/ConstraintValidator.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tpaycom\magento2basic\Model;
+
+use Magento\Checkout\Model\Session;
+
+class ConstraintValidator
+{
+    /** @var Session */
+    private $checkoutSession;
+
+    public function __construct(Session $session)
+    {
+        $this->checkoutSession = $session;
+    }
+
+    public function validate(array $constraints): bool
+    {
+        foreach ($constraints as $constraint) {
+            switch ($constraint['type']) {
+                case 'min':
+                    if (!$this->validateMinimalTotal((float) $constraint['value'])) {
+                        return false;
+                    }
+
+                    break;
+                case 'max':
+                    if (!$this->validateMaximalTotal((float) $constraint['value'])) {
+                        return false;
+                    }
+
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return true;
+    }
+
+    private function validateMinimalTotal(float $minimal): bool
+    {
+        return $this->checkoutSession->getQuote()->getGrandTotal() > $minimal;
+    }
+
+    private function validateMaximalTotal(float $maximal): bool
+    {
+        return $this->checkoutSession->getQuote()->getGrandTotal() < $maximal;
+    }
+}
diff --git a/Model/MethodListPlugin.php b/Model/MethodListPlugin.php
index e4f8310..d191164 100644
--- a/Model/MethodListPlugin.php
+++ b/Model/MethodListPlugin.php
@@ -10,11 +10,12 @@
 use Magento\Store\Model\ScopeInterface;
 use Magento\Store\Model\StoreManagerInterface;
 use tpaycom\magento2basic\Api\TpayInterface;
+use tpaycom\magento2basic\Model\ApiFacade\Transaction\TransactionApiFacade;
 use tpaycom\magento2basic\Model\Config\Source\OnsiteChannels;
 
 class MethodListPlugin
 {
-    private const CONFIG_PATH = 'payment/tpaycom_magento2basic/onsite_channels';
+    private const CONFIG_PATH = 'payment/tpaycom_magento2basic/openapi_settings/onsite_channels';
 
     /** @var Data */
     private $data;
@@ -34,31 +35,55 @@ class MethodListPlugin
     /** @var Session */
     private $checkoutSession;
 
-    public function __construct(Data $data, ScopeConfigInterface $scopeConfig, OnsiteChannels $onsiteChannels, StoreManagerInterface $storeManager, Tpay $tpay, Session $checkoutSession)
-    {
+    /** @var TransactionApiFacade */
+    private $transactions;
+
+    /** @var ConstraintValidator */
+    private $constraintValidator;
+
+    public function __construct(
+        Data $data,
+        ScopeConfigInterface $scopeConfig,
+        OnsiteChannels $onsiteChannels,
+        StoreManagerInterface $storeManager,
+        Tpay $tpay,
+        Session $checkoutSession,
+        TransactionApiFacade $transactions,
+        ConstraintValidator $constraintValidator
+    ) {
         $this->data = $data;
         $this->scopeConfig = $scopeConfig;
         $this->onsiteChannels = $onsiteChannels;
         $this->storeManager = $storeManager;
         $this->tpay = $tpay;
         $this->checkoutSession = $checkoutSession;
+        $this->transactions = $transactions;
+        $this->constraintValidator = $constraintValidator;
     }
 
     public function afterGetAvailableMethods(MethodList $compiled, $result)
     {
         $onsiteChannels = $this->scopeConfig->getValue(self::CONFIG_PATH, ScopeInterface::SCOPE_STORE);
-        $channels = $onsiteChannels ? explode(',', $onsiteChannels) : [];
+        $channelList = $onsiteChannels ? explode(',', $onsiteChannels) : [];
+        $channels = $this->transactions->channels();
 
-        if (!$this->tpay->isCartValid((float) $this->checkoutSession->getQuote()->getGrandTotal())) {
+        if (!$this->tpay->isCartValid($this->checkoutSession->getQuote()->getGrandTotal())) {
             return $result;
         }
 
         $result[] = $this->getMethodInstance('tpay.com - Płatność kartą', 'tpaycom_magento2basic_cards');
         $result = $this->filterResult($result);
 
-        foreach ($channels as $onsiteChannel) {
+        foreach ($channelList as $onsiteChannel) {
+            $channel = $channels[$onsiteChannel];
+
+            if (!empty($channel->constraints) && !$this->constraintValidator->validate($channel->constraints)) {
+                continue;
+            }
+
+            $title = $this->onsiteChannels->getLabelFromValue($onsiteChannel);
             $result[] = $this->getMethodInstance(
-                $this->onsiteChannels->getLabelFromValue($onsiteChannel),
+                $title,
                 "generic-{$onsiteChannel}"
             );
         }