diff --git a/src/Api/Blik/BlikApi.php b/src/Api/Blik/BlikApi.php
new file mode 100644
index 0000000..ae4e6b2
--- /dev/null
+++ b/src/Api/Blik/BlikApi.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Tpay\OpenApi\Api\Blik;
+
+use Tpay\OpenApi\Api\ApiAction;
+use Tpay\OpenApi\Model\Objects\RequestBody\CreateAlias;
+use Tpay\OpenApi\Model\Objects\RequestBody\DeleteAlias;
+
+class BlikApi extends ApiAction
+{
+    /** @param array $fields */
+    public function createAlias($fields)
+    {
+        return $this->run(static::POST, '/blik/alias', $fields, new CreateAlias());
+    }
+
+    /**
+     * @param string $aliasValue
+     * @param string $aliasType
+     */
+    public function getAlias($aliasValue, $aliasType)
+    {
+        $requestUrl = $this->addQueryFields(
+            sprintf('/blik/alias/%s', $aliasValue),
+            ['aliasType' => $aliasType]
+        );
+
+        return $this->run(static::GET, $requestUrl);
+    }
+
+    /**
+     * @param string $aliasValue
+     * @param array  $fields
+     */
+    public function deleteAlias($aliasValue, $fields)
+    {
+        return $this->run(static::DELETE, sprintf('/blik/alias/%s', $aliasValue), $fields, new DeleteAlias());
+    }
+}
diff --git a/src/Api/TpayApi.php b/src/Api/TpayApi.php
index 66ca600..0518459 100644
--- a/src/Api/TpayApi.php
+++ b/src/Api/TpayApi.php
@@ -5,6 +5,7 @@
 use RuntimeException;
 use Tpay\OpenApi\Api\Accounts\AccountsApi;
 use Tpay\OpenApi\Api\Authorization\AuthorizationApi;
+use Tpay\OpenApi\Api\Blik\BlikApi;
 use Tpay\OpenApi\Api\Collect\CollectApi;
 use Tpay\OpenApi\Api\Refunds\RefundsApi;
 use Tpay\OpenApi\Api\Reports\ReportsApi;
@@ -15,6 +16,9 @@
 
 class TpayApi
 {
+    /** @var null|BlikApi */
+    private $blik;
+
     /** @var null|AccountsApi */
     private $accounts;
 
@@ -93,6 +97,22 @@ public function getToken()
         return $this->token;
     }
 
+    /** @return BlikApi */
+    public function blik()
+    {
+        $this->authorize();
+        if (null === $this->blik) {
+            $this->blik = (new BlikApi($this->token, $this->productionMode))
+                ->overrideApiUrl($this->apiUrl);
+
+            if ($this->clientName) {
+                $this->blik->setClientName($this->clientName);
+            }
+        }
+
+        return $this->blik;
+    }
+
     /** @return AccountsApi */
     public function accounts()
     {
diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index 2a1a8dc..8bcd9b8 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -193,7 +193,7 @@ private function setCurlMethod($curl)
             case 'POST':
                 curl_setopt($curl, CURLOPT_POST, 1);
                 if (!empty($this->postData)) {
-                    $json = json_encode($this->postData);
+                    $json = json_encode($this->postData, JSON_PRESERVE_ZERO_FRACTION);
                     curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
                 }
                 break;
@@ -203,7 +203,9 @@ private function setCurlMethod($curl)
             case 'DELETE':
                 curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
                 if (!empty($this->postData)) {
-                    curl_setopt($curl, CURLOPT_POSTFIELDS, $this->postData);
+                    $json = json_encode($this->postData, JSON_PRESERVE_ZERO_FRACTION);
+                    curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
+                    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
                 }
                 break;
             case 'GET':
diff --git a/src/Dictionary/HttpCodesDictionary.php b/src/Dictionary/HttpCodesDictionary.php
index 6ee8b77..8c3ee48 100644
--- a/src/Dictionary/HttpCodesDictionary.php
+++ b/src/Dictionary/HttpCodesDictionary.php
@@ -9,6 +9,7 @@ class HttpCodesDictionary
         200 => 'OK - default successful outcome of the request',
         201 => 'Created - successfully created a new object',
         202 => 'Accepted - successfully created a new object, but requires further action',
+        204 => 'No Content - successful outcome of the request, but no content to return',
     ];
 
     const HTTP_ERROR_CODES = [
diff --git a/src/Model/Fields/Alias/RecommendedAuthLevel.php b/src/Model/Fields/Alias/RecommendedAuthLevel.php
new file mode 100644
index 0000000..ecb8f5b
--- /dev/null
+++ b/src/Model/Fields/Alias/RecommendedAuthLevel.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Fields\Alias;
+
+use Tpay\OpenApi\Model\Fields\Field;
+
+/**
+ * @method getValue(): string
+ */
+class RecommendedAuthLevel extends Field
+{
+    protected $name = __CLASS__;
+    protected $type = self::STRING;
+    protected $enum = [
+        'NOCONFREQ',
+    ];
+}
diff --git a/src/Model/Fields/BlikPaymentData/Autopayment/SingleLimitAmount.php b/src/Model/Fields/BlikPaymentData/Autopayment/SingleLimitAmount.php
index d1fc45e..4fc33b2 100644
--- a/src/Model/Fields/BlikPaymentData/Autopayment/SingleLimitAmount.php
+++ b/src/Model/Fields/BlikPaymentData/Autopayment/SingleLimitAmount.php
@@ -5,10 +5,10 @@
 use Tpay\OpenApi\Model\Fields\Field;
 
 /**
- * @method getValue(): string
+ * @method getValue(): float
  */
 class SingleLimitAmount extends Field
 {
     protected $name = __CLASS__;
-    protected $type = self::INT;
+    protected $type = self::NUMBER;
 }
diff --git a/src/Model/Fields/BlikPaymentData/Autopayment/TotalLimitAmount.php b/src/Model/Fields/BlikPaymentData/Autopayment/TotalLimitAmount.php
index 9bfdb41..7efb715 100644
--- a/src/Model/Fields/BlikPaymentData/Autopayment/TotalLimitAmount.php
+++ b/src/Model/Fields/BlikPaymentData/Autopayment/TotalLimitAmount.php
@@ -5,10 +5,10 @@
 use Tpay\OpenApi\Model\Fields\Field;
 
 /**
- * @method getValue(): string
+ * @method getValue(): float
  */
 class TotalLimitAmount extends Field
 {
     protected $name = __CLASS__;
-    protected $type = self::INT;
+    protected $type = self::NUMBER;
 }
diff --git a/src/Model/Fields/CreateAlias/Description.php b/src/Model/Fields/CreateAlias/Description.php
new file mode 100644
index 0000000..58e91c4
--- /dev/null
+++ b/src/Model/Fields/CreateAlias/Description.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Fields\CreateAlias;
+
+use Tpay\OpenApi\Model\Fields\Field;
+
+/**
+ * @method getValue(): string
+ */
+class Description extends Field
+{
+    protected $name = __CLASS__;
+    protected $type = self::STRING;
+    protected $maxLength = 105;
+    protected $minLength = 1;
+}
diff --git a/src/Model/Fields/CreateAlias/Lang.php b/src/Model/Fields/CreateAlias/Lang.php
new file mode 100644
index 0000000..57cebda
--- /dev/null
+++ b/src/Model/Fields/CreateAlias/Lang.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Fields\CreateAlias;
+
+use Tpay\OpenApi\Model\Fields\Field;
+
+/**
+ * @method getValue(): string
+ */
+class Lang extends Field
+{
+    protected $name = __CLASS__;
+    protected $type = self::STRING;
+    protected $enum = [
+        'en',
+        'pl',
+        'de',
+        'fr',
+        'ru',
+        'it',
+        'es',
+        'uk',
+    ];
+}
diff --git a/src/Model/Objects/Blik/CreateAliasPay.php b/src/Model/Objects/Blik/CreateAliasPay.php
new file mode 100644
index 0000000..53f688a
--- /dev/null
+++ b/src/Model/Objects/Blik/CreateAliasPay.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Objects\Blik;
+
+use Tpay\OpenApi\Model\Objects\Objects;
+use Tpay\OpenApi\Model\Objects\Transactions\BlikPaymentData;
+
+class CreateAliasPay extends Objects
+{
+    const OBJECT_FIELDS = [
+        'blikPaymentData' => BlikPaymentData::class,
+    ];
+
+    /** @var BlikPaymentData */
+    public $blikPaymentData;
+
+    public function getRequiredFields()
+    {
+        return [
+            $this->blikPaymentData,
+        ];
+    }
+}
diff --git a/src/Model/Objects/RequestBody/CreateAlias.php b/src/Model/Objects/RequestBody/CreateAlias.php
new file mode 100644
index 0000000..7f6d82c
--- /dev/null
+++ b/src/Model/Objects/RequestBody/CreateAlias.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Objects\RequestBody;
+
+use Tpay\OpenApi\Model\Fields\CreateAlias\Description;
+use Tpay\OpenApi\Model\Fields\CreateAlias\Lang;
+use Tpay\OpenApi\Model\Objects\Blik\CreateAliasPay;
+use Tpay\OpenApi\Model\Objects\Objects;
+
+class CreateAlias extends Objects
+{
+    const OBJECT_FIELDS = [
+        'description' => Description::class,
+        'lang' => Lang::class,
+        'pay' => CreateAliasPay::class,
+    ];
+
+    /** @var Description */
+    public $description;
+
+    /** @var Lang */
+    public $lang;
+
+    /** @var CreateAliasPay */
+    public $pay;
+
+    public function getRequiredFields()
+    {
+        return [
+            $this->description,
+            $this->pay,
+        ];
+    }
+}
diff --git a/src/Model/Objects/RequestBody/DeleteAlias.php b/src/Model/Objects/RequestBody/DeleteAlias.php
new file mode 100644
index 0000000..7a3553a
--- /dev/null
+++ b/src/Model/Objects/RequestBody/DeleteAlias.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Tpay\OpenApi\Model\Objects\RequestBody;
+
+use Tpay\OpenApi\Model\Fields\Alias\Type;
+use Tpay\OpenApi\Model\Objects\Objects;
+
+class DeleteAlias extends Objects
+{
+    const OBJECT_FIELDS = [
+        'aliasType' => Type::class,
+    ];
+
+    /** @var Type */
+    public $aliasType;
+
+    public function getRequiredFields()
+    {
+        return [
+            $this->aliasType,
+        ];
+    }
+}
diff --git a/src/Model/Objects/Transactions/Alias.php b/src/Model/Objects/Transactions/Alias.php
index b23bc46..0f95e8e 100644
--- a/src/Model/Objects/Transactions/Alias.php
+++ b/src/Model/Objects/Transactions/Alias.php
@@ -4,6 +4,7 @@
 
 use Tpay\OpenApi\Model\Fields\Alias\Key;
 use Tpay\OpenApi\Model\Fields\Alias\Label;
+use Tpay\OpenApi\Model\Fields\Alias\RecommendedAuthLevel;
 use Tpay\OpenApi\Model\Fields\Alias\Type;
 use Tpay\OpenApi\Model\Fields\Alias\Value;
 use Tpay\OpenApi\Model\Fields\Boolean;
@@ -17,6 +18,7 @@ class Alias extends Objects
         'type' => Type::class,
         'label' => Label::class,
         'key' => Key::class,
+        'recommendedAuthLevel' => RecommendedAuthLevel::class,
         'autopayment' => Autopayment::class,
         'noDelay' => Boolean::class,
     ];
@@ -33,6 +35,9 @@ class Alias extends Objects
     /** @var Key */
     public $key;
 
+    /** @var RecommendedAuthLevel */
+    public $recommendedAuthLevel;
+
     /** @var Autopayment */
     public $autopayment;
 
diff --git a/tests/Api/Blik/BlikApiTest.php b/tests/Api/Blik/BlikApiTest.php
new file mode 100644
index 0000000..f8557d9
--- /dev/null
+++ b/tests/Api/Blik/BlikApiTest.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace Tpay\Tests\OpenApi\Api\Blik;
+
+use PHPUnit\Framework\TestCase;
+use Tpay\OpenApi\Api\Blik\BlikApi;
+use Tpay\OpenApi\Model\Fields\Token\AccessToken;
+use Tpay\OpenApi\Model\Objects\Authorization\Token;
+use Tpay\Tests\OpenApi\Mock\CurlMock;
+
+/**
+ * @covers \Tpay\OpenApi\Api\Blik\BlikApi
+ */
+class BlikApiTest extends TestCase
+{
+    /** @dataProvider dataCreateAlias */
+    public function testCreateAlias(array $fields)
+    {
+        $blikApi = $this->createBlikApiWithCurlMock('"ok"');
+
+        $result = $blikApi->createAlias($fields);
+
+        self::assertSame('ok', $result);
+    }
+
+    public function testGetAlias()
+    {
+        $blikApi = $this->createBlikApiWithCurlMock('"ok"');
+
+        $result = $blikApi->getAlias('some-alias-value', 'PAYID');
+
+        self::assertSame('ok', $result);
+    }
+
+    public function testDeleteAlias()
+    {
+        $blikApi = $this->createBlikApiWithCurlMock('"ok"');
+
+        $result = $blikApi->deleteAlias('some-alias-value', ['aliasType' => 'PAYID']);
+
+        self::assertSame('ok', $result);
+    }
+
+    public static function dataCreateAlias()
+    {
+        $fields = [
+            'description' => 'YourGroceryShop payments',
+            'pay' => [
+                'blikPaymentData' => [
+                    'blikToken' => '123456',
+                    'type' => 0,
+                ],
+            ],
+        ];
+
+        yield 'without lang' => [$fields];
+
+        $fields['lang'] = 'pl';
+
+        yield 'with lang' => [$fields];
+
+        $fields['pay']['blikPaymentData']['aliases'] = [
+            'value' => 'TPAY_ALIAS_1',
+            'type' => 'PAYID',
+            'label' => 'YourGroceryShop, the best shop for your grocery needs',
+            'autopayment' => [
+                'model' => 'A',
+                'frequency' => '17D',
+                'singleLimitAmount' => 100,
+                'totalLimitAmount' => 1000,
+                'currency' => 'PLN',
+                'initDate' => '2025-01-01T00:00:00+00:00',
+                'expirationDate' => '2028-01-01T00:00:00+00:00',
+            ],
+        ];
+
+        yield 'with aliases and autopayment' => [$fields];
+
+        $fields['pay']['blikPaymentData']['type'] = 2;
+        unset($fields['pay']['blikPaymentData']['blikToken']);
+
+        yield 'autopayment type 2 without blikToken' => [$fields];
+    }
+
+    private function createBlikApiWithCurlMock($response)
+    {
+        $accessToken = $this->createMock(AccessToken::class);
+
+        $token = $this->createMock(Token::class);
+        $token->access_token = $accessToken;
+
+        $blikApi = new BlikApi($token, false);
+
+        CurlMock::setConsecutiveReturnedTransfers($response);
+
+        return $blikApi;
+    }
+}