diff --git a/src/Adapter/ApplepayAdapter.php b/src/Adapter/ApplepayAdapter.php
new file mode 100644
index 00000000..cd33937a
--- /dev/null
+++ b/src/Adapter/ApplepayAdapter.php
@@ -0,0 +1,163 @@
+<?php
+/** @noinspection PhpComposerExtensionStubsInspection */
+
+/**
+ * This is a wrapper for the applepay http adapter (CURL).
+ *
+ * Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @link https://dev.unzer.com/
+ *
+ * @author David Owusu <development@unzer.com>
+ *
+ * @package  UnzerSDK\Adapter
+ */
+namespace UnzerSDK\Adapter;
+
+use UnzerSDK\Constants\ApplepayValidationDomains;
+use UnzerSDK\Exceptions\ApplepayMerchantValidationException;
+use UnzerSDK\Resources\ExternalResources\ApplepaySession;
+use UnzerSDK\Services\EnvironmentService;
+
+class ApplepayAdapter
+{
+    private $request;
+
+    /**
+     * @param string          $merchantValidationURL                     URL for merchant validation request
+     * @param ApplepaySession $applePaySession                           Containing applepay session data.
+     * @param string          $merchantValidationCertificatePath         Path to merchant identification certificate
+     * @param string|null     $merchantValidationCertificateKeyChainPath
+     *
+     * @return string|null
+     *
+     * @throws ApplepayMerchantValidationException
+     */
+    public function validateApplePayMerchant(
+        string $merchantValidationURL,
+        ApplepaySession $applePaySession,
+        string $merchantValidationCertificatePath,
+        ?string $merchantValidationCertificateKeyChainPath = null
+    ): ?string {
+        if (!$this->validMerchantValidationDomain($merchantValidationURL)) {
+            throw new ApplepayMerchantValidationException('Invalid URL used for merchantValidation request.');
+        }
+        $payload = $applePaySession->jsonSerialize();
+        $this->init(
+            $merchantValidationURL,
+            $payload,
+            $merchantValidationCertificatePath,
+            $merchantValidationCertificateKeyChainPath
+        );
+        $sessionResponse = $this->execute();
+        $this->close();
+        return $sessionResponse;
+    }
+
+    /**
+     * Check whether domain of merchantValidationURL is allowed for validation request.
+     *
+     * @param string $merchantValidationURL URL used for merchant validation request.
+     *
+     */
+    public function validMerchantValidationDomain(string $merchantValidationURL): bool
+    {
+        $domain = explode('/', $merchantValidationURL)[2] ?? '';
+
+        $UrlList = ApplepayValidationDomains::ALLOWED_VALIDATION_URLS;
+        return in_array($domain, $UrlList);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function init($url, $payload, $sslCert, $caCert = null): void
+    {
+        $timeout = EnvironmentService::getTimeout();
+        $curlVerbose = EnvironmentService::isCurlVerbose();
+
+        $this->request = curl_init($url);
+        $this->setOption(CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
+        $this->setOption(CURLOPT_POST, 1);
+        $this->setOption(CURLOPT_DNS_USE_GLOBAL_CACHE, false);
+        $this->setOption(CURLOPT_POSTFIELDS, $payload);
+        $this->setOption(CURLOPT_FAILONERROR, false);
+        $this->setOption(CURLOPT_TIMEOUT, $timeout);
+        $this->setOption(CURLOPT_CONNECTTIMEOUT, $timeout);
+        $this->setOption(CURLOPT_HTTP200ALIASES, (array)400);
+        $this->setOption(CURLOPT_RETURNTRANSFER, 1);
+        $this->setOption(CURLOPT_SSL_VERIFYPEER, 1);
+        $this->setOption(CURLOPT_SSL_VERIFYHOST, 2);
+        $this->setOption(CURLOPT_VERBOSE, $curlVerbose);
+        $this->setOption(CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
+
+        $this->setOption(CURLOPT_SSLCERT, $sslCert);
+        if (isset($caCert)) {
+            $this->setOption(CURLOPT_CAINFO, $caCert);
+        }
+    }
+
+    /**
+     * Sets curl option.
+     *
+     * @param $name
+     * @param $value
+     */
+    private function setOption($name, $value): void
+    {
+        curl_setopt($this->request, $name, $value);
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @throws ApplepayMerchantValidationException
+     */
+    public function execute(): ?string
+    {
+        $response = curl_exec($this->request);
+        $error = curl_error($this->request);
+        $errorNo = curl_errno($this->request);
+
+        switch ($errorNo) {
+            case 0:
+                return $response;
+                break;
+            case CURLE_OPERATION_TIMEDOUT:
+                $errorMessage = 'Timeout: The Applepay API seems to be not available at the moment!';
+                break;
+            default:
+                $errorMessage = $error . ' (curl_errno: ' . $errorNo . ').';
+                break;
+        }
+        throw new ApplepayMerchantValidationException($errorMessage);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function close(): void
+    {
+        curl_close($this->request);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getResponseCode(): string
+    {
+        return curl_getinfo($this->request, CURLINFO_HTTP_CODE);
+    }
+}
diff --git a/src/Constants/ApplepayValidationDomains.php b/src/Constants/ApplepayValidationDomains.php
new file mode 100644
index 00000000..9f9824ab
--- /dev/null
+++ b/src/Constants/ApplepayValidationDomains.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * This file contains the different domains that are allowed to be used for merchant validation.
+ *
+ * Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @link  https://docs.unzer.com/
+ *
+ * @author  David Owusu <development@unzer.com>
+ *
+ * @package  UnzerSDK\Constants
+ */
+namespace UnzerSDK\Constants;
+
+class ApplepayValidationDomains
+{
+    // URL list
+    public const ALLOWED_VALIDATION_URLS = [
+        'apple-pay-gateway.apple.com',
+        'cn-apple-pay-gateway.apple.com',
+        'apple-pay-gateway-nc-pod1.apple.com',
+        'apple-pay-gateway-nc-pod2.apple.com',
+        'apple-pay-gateway-nc-pod3.apple.com',
+        'apple-pay-gateway-nc-pod4.apple.com',
+        'apple-pay-gateway-nc-pod5.apple.com',
+        'apple-pay-gateway-pr-pod1.apple.com',
+        'apple-pay-gateway-pr-pod2.apple.com',
+        'apple-pay-gateway-pr-pod3.apple.com',
+        'apple-pay-gateway-pr-pod4.apple.com',
+        'apple-pay-gateway-pr-pod5.apple.com',
+        'cn-apple-pay-gateway-sh-pod1.apple.com',
+        'cn-apple-pay-gateway-sh-pod2.apple.com',
+        'cn-apple-pay-gateway-sh-pod3.apple.com',
+        'cn-apple-pay-gateway-tj-pod1.apple.com',
+        'cn-apple-pay-gateway-tj-pod2.apple.com',
+        'cn-apple-pay-gateway-tj-pod3.apple.com',
+        'apple-pay-gateway-cert.apple.com',
+        'cn-apple-pay-gateway-cert.apple.com'
+    ];
+}
diff --git a/src/Exceptions/ApplepayMerchantValidationException.php b/src/Exceptions/ApplepayMerchantValidationException.php
new file mode 100644
index 00000000..ba61e821
--- /dev/null
+++ b/src/Exceptions/ApplepayMerchantValidationException.php
@@ -0,0 +1,33 @@
+<?php
+/*
+ *  This exception is thrown whenever the apple merchant validation request returns an error.
+ *
+ *  Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  @link  https://docs.unzer.com/
+ *
+ *  @author  David Owusu <development@unzer.com>
+ *
+ *  @package  UnzerSDK
+ *
+ */
+
+namespace UnzerSDK\Exceptions;
+
+use Exception;
+
+class ApplepayMerchantValidationException extends Exception
+{
+}
diff --git a/src/Resources/ExternalResources/ApplepaySession.php b/src/Resources/ExternalResources/ApplepaySession.php
new file mode 100644
index 00000000..8fb4a416
--- /dev/null
+++ b/src/Resources/ExternalResources/ApplepaySession.php
@@ -0,0 +1,133 @@
+<?php
+/*
+ *  This class is used for applepay merchant validation request.
+ *
+ *  Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  @link  https://docs.unzer.com/
+ *
+ *  @author  David Owusu <development@unzer.com>
+ *
+ *  @package  UnzerSDK
+ *
+ */
+
+namespace UnzerSDK\Resources\ExternalResources;
+
+class ApplepaySession
+{
+    /**
+     * This can be found in the Apple Developer Account
+     *
+     * @var string|null $merchantIdentifier
+     */
+    private $merchantIdentifier;
+
+    /**
+     * This is the Merchant-Name
+     *
+     * @var string|null $displayName
+     */
+    private $displayName;
+
+    /**
+     * This is the Domain Name which has been validated in the Apple Developer Account.
+     *
+     * @var string|null $domainName
+     */
+    private $domainName;
+
+    /**
+     * ApplepaySession constructor.
+     *
+     * @param string $merchantIdentifier
+     * @param string $displayName
+     * @param string $domainName
+     */
+    public function __construct(string $merchantIdentifier, string $displayName, string $domainName)
+    {
+        $this->merchantIdentifier = $merchantIdentifier;
+        $this->displayName = $displayName;
+        $this->domainName = $domainName;
+    }
+
+    /**
+     * Returns the json representation of this object's properties.
+     *
+     * @return false|string
+     */
+    public function jsonSerialize()
+    {
+        $properties = get_object_vars($this);
+        return json_encode($properties, JSON_UNESCAPED_SLASHES | JSON_PRESERVE_ZERO_FRACTION);
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getMerchantIdentifier(): ?string
+    {
+        return $this->merchantIdentifier;
+    }
+
+    /**
+     * @param string|null $merchantIdentifier
+     *
+     * @return ApplepaySession
+     */
+    public function setMerchantIdentifier(?string $merchantIdentifier): ApplepaySession
+    {
+        $this->merchantIdentifier = $merchantIdentifier;
+        return $this;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getDisplayName(): ?string
+    {
+        return $this->displayName;
+    }
+
+    /**
+     * @param string|null $displayName
+     *
+     * @return ApplepaySession
+     */
+    public function setDisplayName(?string $displayName): ApplepaySession
+    {
+        $this->displayName = $displayName;
+        return $this;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getDomainName(): ?string
+    {
+        return $this->domainName;
+    }
+
+    /**
+     * @param string|null $domainName
+     *
+     * @return ApplepaySession
+     */
+    public function setDomainName(?string $domainName): ApplepaySession
+    {
+        $this->domainName = $domainName;
+        return $this;
+    }
+}
diff --git a/src/Services/EnvironmentService.php b/src/Services/EnvironmentService.php
index fbfdbaa9..4888a8d2 100755
--- a/src/Services/EnvironmentService.php
+++ b/src/Services/EnvironmentService.php
@@ -41,6 +41,9 @@ class EnvironmentService
     public const ENV_VAR_TEST_PRIVATE_KEY_NON_3DS = 'UNZER_PAPI_TEST_PRIVATE_KEY_NON_3DS';
     public const ENV_VAR_TEST_PUBLIC_KEY_NON_3DS = 'UNZER_PAPI_TEST_PUBLIC_KEY_NON_3DS';
 
+    public const ENV_VAR_TEST_APPLE_MERCHANT_CERTIFICATE = 'UNZER_APPLE_MERCHANT_CERTIFICATE_PATH';
+    public const ENV_VAR_TEST_APPLE_CA_CERTIFICATE = 'UNZER_APPLE_CA_CERTIFICATE_PATH';
+
     private const ENV_VAR_NAME_TIMEOUT = 'UNZER_PAPI_TIMEOUT';
     private const DEFAULT_TIMEOUT = 60;
 
@@ -137,4 +140,24 @@ public static function getTestPublicKey($non3ds = false): string
         $key = stripslashes($_SERVER[$variableName] ?? '');
         return empty($key) ? '' : $key;
     }
+
+    /**
+     * Returns the apple merchant certificate path set via environment variable.
+     *
+     * @return string
+     */
+    public static function getAppleMerchantCertificatePath(): string
+    {
+        return stripslashes($_SERVER[self::ENV_VAR_TEST_APPLE_MERCHANT_CERTIFICATE] ?? '');
+    }
+
+    /**
+     * Returns the CA certificate path set via environment variable.
+     *
+     * @return string
+     */
+    public static function getAppleCaCertificatePath(): string
+    {
+        return stripslashes($_SERVER[self::ENV_VAR_TEST_APPLE_CA_CERTIFICATE] ?? '');
+    }
 }
diff --git a/test/integration/ApplepayAdapterTest.php b/test/integration/ApplepayAdapterTest.php
new file mode 100644
index 00000000..98f002b7
--- /dev/null
+++ b/test/integration/ApplepayAdapterTest.php
@@ -0,0 +1,151 @@
+<?php
+/*
+ *  Test class for applepay adapter
+ *
+ *  Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  @link  https://docs.unzer.com/
+ *
+ *  @author  David Owusu <development@unzer.com>
+ *
+ *  @package  UnzerSDK
+ *
+ */
+
+namespace UnzerSDK\test\integration;
+
+use UnzerSDK\Adapter\ApplepayAdapter;
+use UnzerSDK\Exceptions\ApplepayMerchantValidationException;
+use UnzerSDK\Resources\ExternalResources\ApplepaySession;
+use UnzerSDK\Services\EnvironmentService;
+use UnzerSDK\test\BaseIntegrationTest;
+
+class ApplepayAdapterTest extends BaseIntegrationTest
+{
+    private $merchantValidationUrl;
+    private $merchantValidationCertificatePath;
+    private $appleCaCertificatePath;
+
+    public function domainShouldBeValidatedCorrectlyDP()
+    {
+        return [
+            'invalid: example.domain.com' => ['https://example.domain.com', false],
+            'valid: https://apple-pay-gateway.apple.com/some/path' => ['https://apple-pay-gateway.apple.com/some/path', true],
+            'valid: https://cn-apple-pay-gateway.apple.com' => ['https://cn-apple-pay-gateway.apple.com', true],
+            'invalid: apple-pay-gateway-nc-pod1.apple.com' => ['apple-pay-gateway-nc-pod1.apple.com', false],
+            'invalid: (empty)' => ['', false],
+        ];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp(): void
+    {
+        $this->merchantValidationUrl = 'https://apple-pay-gateway-cert.apple.com/paymentservices/startSession';
+        $this->merchantValidationCertificatePath = EnvironmentService::getAppleMerchantCertificatePath();
+        $this->appleCaCertificatePath = EnvironmentService::getAppleCaCertificatePath();
+    }
+
+    /**
+     * test merchant validation request.
+     *
+     * @test
+     *
+     * @throws \UnzerSDK\Exceptions\ApplepayMerchantValidationException
+     */
+    public function verifyMerchantValidationRequest(): void
+    {
+        $applepaySession = $this->createApplepaySession();
+        $appleAdapter = new ApplepayAdapter();
+
+        $validationResponse = $appleAdapter->validateApplePayMerchant(
+            $this->merchantValidationUrl,
+            $applepaySession,
+            $this->merchantValidationCertificatePath,
+            $this->appleCaCertificatePath
+        );
+
+        $this->assertNotNull($validationResponse);
+    }
+
+    /**
+     * test merchant validation request without ca certificate.
+     *
+     * @test
+     *
+     * @throws \UnzerSDK\Exceptions\ApplepayMerchantValidationException
+     */
+    public function merchantValidationWorksWithoutCaCert(): void
+    {
+        $applepaySession = $this->createApplepaySession();
+        $appleAdapter = new ApplepayAdapter();
+
+        $validationResponse = $appleAdapter->validateApplePayMerchant(
+            $this->merchantValidationUrl,
+            $applepaySession,
+            $this->merchantValidationCertificatePath
+        );
+
+        $this->assertNotNull($validationResponse);
+    }
+
+    /**
+     * Merchant validation call should throw Exception if domain of Validation url is invalid.
+     *
+     * @test
+     *
+     */
+    public function merchantValidationThrowsErrorForInvalidDomain(): void
+    {
+        $applepaySession = $this->createApplepaySession();
+        $appleAdapter = new ApplepayAdapter();
+
+        $this->expectException(ApplepayMerchantValidationException::class);
+        $this->expectExceptionMessage('Invalid URL used for merchantValidation request.');
+
+        $appleAdapter->validateApplePayMerchant(
+            'https://invalid.domain.com/some/path',
+            $applepaySession,
+            $this->merchantValidationCertificatePath
+        );
+    }
+
+    /**
+     * test merchant validation request without ca certificate.
+     *
+     * @dataProvider domainShouldBeValidatedCorrectlyDP
+     * @test
+     *
+     * @param mixed $validationUrl
+     * @param mixed $expectedResult
+     *
+     */
+    public function domainShouldBeValidatedCorrectly($validationUrl, $expectedResult): void
+    {
+        $appleAdapter = new ApplepayAdapter();
+
+        $domainValidation = $appleAdapter->validMerchantValidationDomain($validationUrl);
+        $this->assertEquals($expectedResult, $domainValidation);
+    }
+
+    /**
+     * @return ApplepaySession
+     */
+    private function createApplepaySession(): ApplepaySession
+    {
+        return new ApplepaySession('merchantIdentifier', 'displayName', 'domainName');
+    }
+}
diff --git a/test/unit/Adapter/ApplepaySessionTest.php b/test/unit/Adapter/ApplepaySessionTest.php
new file mode 100644
index 00000000..84dfa01a
--- /dev/null
+++ b/test/unit/Adapter/ApplepaySessionTest.php
@@ -0,0 +1,42 @@
+<?php
+/*
+ *  Test class for ApplepaySession.
+ *
+ *  Copyright (C) 2021 - today Unzer E-Com GmbH
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  @link  https://docs.unzer.com/
+ *
+ *  @author  David Owusu <development@unzer.com>
+ *
+ *  @package  UnzerSDK
+ *
+ */
+
+namespace UnzerSDK\test\unit\Adapter;
+
+use PHPUnit\Framework\TestCase;
+use UnzerSDK\Resources\ExternalResources\ApplepaySession;
+
+class ApplepaySessionTest extends TestCase
+{
+    public function testJsonSerialize(): void
+    {
+        $applepaySession = new ApplepaySession('merchantIdentifier', 'displayName', 'domainName');
+        $expectedJson = '{"merchantIdentifier": "merchantIdentifier", "displayName": "displayName", "domainName": "domainName"}';
+
+        $jsonSerialize = $applepaySession->jsonSerialize();
+        $this->assertJsonStringEqualsJsonString($expectedJson, $jsonSerialize);
+    }
+}