diff --git a/src/availabilities/Service.php b/src/availabilities/Service.php
new file mode 100644
index 0000000..e88ea24
--- /dev/null
+++ b/src/availabilities/Service.php
@@ -0,0 +1,405 @@
+<?php namespace Meplato\Store2\Availabilities;
+// Copyright (c) 2013-present Meplato 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.
+
+use Meplato\Store2;
+
+/**
+ * Service is the entry-point to the Meplato Store API.
+ *
+ * @copyright 2013-present Meplato GmbH.
+ * @author Meplato API Team <support@meplato.com>
+ * @version 2.2.0
+ * @license Copyright (c) 2015-2023 Meplato GmbH. All rights reserved.
+ * @link https://developer.meplato.com/store2/#terms Terms of Service
+ * @link https://developer.meplato.com/store2/ External documentation
+ */
+class Service
+{
+	/** @@var string API title */
+	const TITLE = "Meplato Store API";
+	/** @@var string API version */
+	const VERSION = "2.2.0";
+	/** @@var string Base URL of the service, including the path */
+	const BASE_URL = "https://store.meplato.com/api/v2";
+	/** @@var string User Agent string that will be sent to the server */
+	const USER_AGENT = "meplato-php-client/2.0";
+
+	/** @var HttpClientInterface Interface for making HTTP requests */
+	private $client;
+	/** @var string Base URL for the API, including the path (default: self::BASE_URL) */
+	private $baseURL;
+	/** @var string User name part of the credentials */
+	private $user;
+	/** @var string Password */
+	private $password;
+
+	function __construct($client)
+	{
+		$this->client = $client;
+		$this->baseURL = self::BASE_URL;
+	}
+
+	function getClient()
+	{
+		return $this->client;
+	}
+
+	function getBaseURL()
+	{
+		return $this->baseURL;
+	}
+
+	function setBaseURL($baseURL)
+	{
+		$this->baseURL = $baseURL;
+	}
+
+	function getUser()
+	{
+		return $this->user;
+	}
+
+	function setUser($user)
+	{
+		$this->user = $user;
+	}
+
+	function getPassword()
+	{
+		return $this->password;
+	}
+
+	function setPassword($password)
+	{
+		$this->password = $password;
+	}
+
+	function delete()
+	{
+		return new DeleteService($this);
+	}
+
+	function get()
+	{
+		return new GetService($this);
+	}
+
+	function upsert()
+	{
+		return new UpsertService($this);
+	}
+}
+
+
+/**
+ * Delete availability information of a product. It is an asynchronous
+ * operation.
+ */
+class DeleteService
+{
+	private $service;
+	private $opt = [];
+	private $hdr = [];
+	private $spn;
+
+	/**
+	 * Creates a new instance of DeleteService.
+	 */
+	function __construct($service)
+	{
+		$this->service = $service;
+	}
+
+	/**
+	 * 2-letter ISO code of the country/region where the product is stored
+	 *
+	 * @param $region (string)
+	 * @return $this so that the function is chainable
+	 */
+	function region($region)
+	{
+		$this->opt["region"] = $region;
+		return $this;
+	}
+
+	/**
+	 * SPN is the unique identifier of a product within a merchant.
+	 *
+	 * @param $spn (string)
+	 * @return $this so that the function is chainable
+	 */
+	function spn($spn)
+	{
+		$this->spn = $spn;
+		return $this;
+	}
+
+	/**
+	 * Zip code where the product is stored
+	 *
+	 * @param $zipCode (string)
+	 * @return $this so that the function is chainable
+	 */
+	function zipCode($zipCode)
+	{
+		$this->opt["zipCode"] = $zipCode;
+		return $this;
+	}
+
+	/**
+	 * Execute the service call.
+	 *
+	 * The return values has the following properties:
+	 * - kind (string): Kind describes this entity, it will be store#availability/deleteResponse.
+	 *
+	 * @return array Deserialized JSON object
+	 * @throws \Meplato\Store2\ServiceException if something goes wrong
+	 */
+	function execute()
+	{
+		// Parameters (in template and query string)
+		$params = [];
+		if (array_key_exists("region", $this->opt)) {
+			$params["region"] = $this->opt["region"];
+		}
+		$params["spn"] = $this->spn;
+		if (array_key_exists("zipCode", $this->opt)) {
+			$params["zipCode"] = $this->opt["zipCode"];
+		}
+
+		// HTTP Headers
+		$headers = [
+			"User-Agent"   => Service::USER_AGENT,
+			"Accept" => "application/json",
+			"Content-Type" => "application/json"
+		];
+
+		$user = $this->service->getUser();
+		$pass = $this->service->getPassword();
+		if (!empty($user) || !empty($pass)) {
+			$credentials = base64_encode("{$user}:{$pass}");
+			$headers["Authorization"] = "Basic {$credentials}";
+		}
+
+		$urlTemplate = $this->service->getBaseURL() . "/products/{spn}/availabilities{?region,zipCode}";
+
+		$body = NULL;
+
+		// Execute request
+		$response = $this->service->getClient()->execute("delete", $urlTemplate, $params, $headers, $body);
+		$status = $response->getStatusCode();
+		if ($status >= 200 && $status <= 299) {
+			return $response->getBodyJSON();
+		}
+		throw new \Meplato\Store2\ServiceException($response);
+	}
+}
+
+
+
+/**
+ * Read availability information of a product
+ */
+class GetService
+{
+	private $service;
+	private $opt = [];
+	private $hdr = [];
+	private $spn;
+
+	/**
+	 * Creates a new instance of GetService.
+	 */
+	function __construct($service)
+	{
+		$this->service = $service;
+	}
+
+	/**
+	 * 2-letter ISO code of the country/region where the product is stored
+	 *
+	 * @param $region (string)
+	 * @return $this so that the function is chainable
+	 */
+	function region($region)
+	{
+		$this->opt["region"] = $region;
+		return $this;
+	}
+
+	/**
+	 * SPN is the unique identifier of a product within a merchant.
+	 *
+	 * @param $spn (string)
+	 * @return $this so that the function is chainable
+	 */
+	function spn($spn)
+	{
+		$this->spn = $spn;
+		return $this;
+	}
+
+	/**
+	 * Zip code where the product is stored
+	 *
+	 * @param $zipCode (string)
+	 * @return $this so that the function is chainable
+	 */
+	function zipCode($zipCode)
+	{
+		$this->opt["zipCode"] = $zipCode;
+		return $this;
+	}
+
+	/**
+	 * Execute the service call.
+	 *
+	 * The return values has the following properties:
+	 * - items (array): Collection of availability information associated with an SPN for a merchant.
+	 * - kind (string): Kind is store#availability/getResponse for this kind of response.
+	 *
+	 * @return array Deserialized JSON object
+	 * @throws \Meplato\Store2\ServiceException if something goes wrong
+	 */
+	function execute()
+	{
+		// Parameters (in template and query string)
+		$params = [];
+		if (array_key_exists("region", $this->opt)) {
+			$params["region"] = $this->opt["region"];
+		}
+		$params["spn"] = $this->spn;
+		if (array_key_exists("zipCode", $this->opt)) {
+			$params["zipCode"] = $this->opt["zipCode"];
+		}
+
+		// HTTP Headers
+		$headers = [
+			"User-Agent"   => Service::USER_AGENT,
+			"Accept" => "application/json",
+			"Content-Type" => "application/json"
+		];
+
+		$user = $this->service->getUser();
+		$pass = $this->service->getPassword();
+		if (!empty($user) || !empty($pass)) {
+			$credentials = base64_encode("{$user}:{$pass}");
+			$headers["Authorization"] = "Basic {$credentials}";
+		}
+
+		$urlTemplate = $this->service->getBaseURL() . "/products/{spn}/availabilities{?region,zipCode}";
+
+		$body = NULL;
+
+		// Execute request
+		$response = $this->service->getClient()->execute("get", $urlTemplate, $params, $headers, $body);
+		$status = $response->getStatusCode();
+		if ($status >= 200 && $status <= 299) {
+			return $response->getBodyJSON();
+		}
+		throw new \Meplato\Store2\ServiceException($response);
+	}
+}
+
+
+
+/**
+ * Update or create availability information of a product. It is an asynchronous
+ * operation.
+ */
+class UpsertService
+{
+	private $service;
+	private $opt = [];
+	private $hdr = [];
+	private $spn;
+	private $availability;
+
+	/**
+	 * Creates a new instance of UpsertService.
+	 */
+	function __construct($service)
+	{
+		$this->service = $service;
+	}
+
+	/**
+	 * Availability properties of the product.
+	 *
+	 * @param $availability (array)
+	 * @return $this so that the function is chainable
+	 */
+	function availability($availability)
+	{
+		$this->availability = $availability;
+		return $this;
+	}
+
+	/**
+	 * SPN is the unique identifier of a product within a merchant.
+	 *
+	 * @param $spn (string)
+	 * @return $this so that the function is chainable
+	 */
+	function spn($spn)
+	{
+		$this->spn = $spn;
+		return $this;
+	}
+
+	/**
+	 * Execute the service call.
+	 *
+	 * The return values has the following properties:
+	 * - kind (string): Kind describes this entity, it will be store#availability/upsertResponse.
+	 * - link (string): Link includes the URL where this resource will be available
+	 *
+	 * @return array Deserialized JSON object
+	 * @throws \Meplato\Store2\ServiceException if something goes wrong
+	 */
+	function execute()
+	{
+		// Parameters (in template and query string)
+		$params = [];
+		$params["spn"] = $this->spn;
+
+		// HTTP Headers
+		$headers = [
+			"User-Agent"   => Service::USER_AGENT,
+			"Accept" => "application/json",
+			"Content-Type" => "application/json"
+		];
+
+		$user = $this->service->getUser();
+		$pass = $this->service->getPassword();
+		if (!empty($user) || !empty($pass)) {
+			$credentials = base64_encode("{$user}:{$pass}");
+			$headers["Authorization"] = "Basic {$credentials}";
+		}
+
+		$urlTemplate = $this->service->getBaseURL() . "/products/{spn}/availabilities";
+
+		$body = json_encode($this->availability);
+
+		// Execute request
+		$response = $this->service->getClient()->execute("put", $urlTemplate, $params, $headers, $body);
+		$status = $response->getStatusCode();
+		if ($status >= 200 && $status <= 299) {
+			return $response->getBodyJSON();
+		}
+		throw new \Meplato\Store2\ServiceException($response);
+	}
+}
+
+
+?>
diff --git a/tests/availabilities/BaseTest.php b/tests/availabilities/BaseTest.php
new file mode 100644
index 0000000..a575a1e
--- /dev/null
+++ b/tests/availabilities/BaseTest.php
@@ -0,0 +1,40 @@
+<?php namespace Meplato\Store2\Availabilities\Tests;
+// Copyright (c) 2015 Meplato GmbH, Switzerland.
+//
+// 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.
+
+/**
+ * Base test for the Availabilities service.
+ */
+abstract class BaseTest extends \Meplato\Store2\Tests\BaseTest
+{
+	public function __construct()
+	{
+	parent::__construct();
+	}
+
+	public function getService()
+	{
+		$client = $this->getHttpClient();
+		$this->service = new \Meplato\Store2\Availabilities\Service($client);
+		$this->service->setBaseURL("http://store2.go/api/v2");
+		return $this->service;
+	}
+
+	protected function setUp(): void
+	{
+	}
+
+	protected function tearDown(): void
+	{
+	}
+}
+?>
diff --git a/tests/availabilities/DeleteTest.php b/tests/availabilities/DeleteTest.php
new file mode 100644
index 0000000..fc53a4b
--- /dev/null
+++ b/tests/availabilities/DeleteTest.php
@@ -0,0 +1,40 @@
+<?php namespace Meplato\Store2\Availabilities\Tests;
+// Copyright (c) 2015 Meplato GmbH, Switzerland.
+//
+// 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.
+
+use Meplato\Store2\HttpClient;
+use Meplato\Store2\Availabilities\Service;
+
+/**
+ * Tests deleting availabilities.
+ */
+class DeleteTest extends BaseTest
+{
+	/**
+	 * Tests a successful call to delete availabilities.
+	 *
+	 * @group availabilities
+	 * @group availabilities.delete
+	 */
+	public function testDelete()
+	{
+
+		$service = $this->getService();
+		$this->mockResponseFromFile('availabilities.delete.success');
+		$response = $service->delete()->spn('1234')->execute();
+
+		$this->assertIsArray($response);
+		$this->assertArrayHasKey('kind', $response);
+		$this->assertEquals('store#availabilities/deleteResponse', $response['kind']);
+	}
+}
+?>
diff --git a/tests/availabilities/GetTest.php b/tests/availabilities/GetTest.php
new file mode 100644
index 0000000..cadf4b5
--- /dev/null
+++ b/tests/availabilities/GetTest.php
@@ -0,0 +1,64 @@
+<?php namespace Meplato\Store2\Availabilities\Tests;
+// Copyright (c) 2015 Meplato GmbH, Switzerland.
+//
+// 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.
+
+use Meplato\Store2\HttpClient;
+use Meplato\Store2\Availabilities\Service;
+
+/**
+ * Tests retrieving of availabilities.
+ */
+class GetTest extends BaseTest
+{
+	/**
+	 * Tests a successful call to retrieve availabilities.
+	 *
+	 * @group availabilities
+	 * @group availabilities.get
+	 */
+	public function testGet()
+	{
+		$service = $this->getService();
+		$this->mockResponseFromFile('availabilities.get.success');
+		$response = $service->get()->spn("1234")->execute();
+		$this->assertIsArray($response);
+		$this->assertArrayHasKey('kind', $response);
+		$this->assertEquals('store#availabilities/getResponse', $response['kind']);
+
+		$this->assertArrayHasKey('items', $response);
+		$this->assertIsArray($response['items']);
+		$this->assertCount(3, $response['items']);
+		$this->assertEquals('1234', $response['items'][0]['spn']);
+	}
+
+	/**
+	 * Test what happens when availabilities are not found.
+	 *
+	 * @group availabilities
+	 * @group availabilities.get
+	 */
+	public function testGetNotFound()
+	{
+		$service = $this->getService();
+		$this->mockResponseFromFile('availabilities.get.not_found');
+
+		$response = $service->get()->spn('no-such-product')->execute();
+
+		$this->assertIsArray($response);
+		$this->assertArrayHasKey('kind', $response);
+		$this->assertEquals('store#availabilities/getResponse', $response['kind']);
+
+		$this->assertArrayHasKey('items', $response);
+		$this->assertNull($response['items']);
+	}
+}
+?>
diff --git a/tests/availabilities/UpsertTest.php b/tests/availabilities/UpsertTest.php
new file mode 100644
index 0000000..d72ce95
--- /dev/null
+++ b/tests/availabilities/UpsertTest.php
@@ -0,0 +1,46 @@
+<?php namespace Meplato\Store2\Availabilities\Tests;
+// Copyright (c) 2015 Meplato GmbH, Switzerland.
+//
+// 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.
+
+use Meplato\Store2\HttpClient;
+use Meplato\Store2\Availabilities\Service;
+
+class UpsertTest extends BaseTest
+{
+	/**
+	 * Tests a successful call to upsert of availabilities.
+	 *
+	 * @group availabilities
+	 * @group availabilities.upsert
+	 */
+	public function testUpsert()
+	{
+		$availability = [
+			'Message'=> "not in stock",
+			'Quantity'=>  0,
+			'Region'=> "AQ",
+			'Updated'=> "Q1/2024",
+			'ZipCode'=> "1234",
+		];
+
+		$service = $this->getService();
+
+		// Upsert availabilities, i.e. either create or update.
+		$this->mockResponseFromFile('availabilities.upsert.success');
+		$response = $service->upsert()->spn(1234)->availability($availability)->execute();
+		$this->assertIsArray($response);
+		$this->assertArrayHasKey('kind', $response);
+		$this->assertEquals('store#availabilities/upsertResponse', $response['kind']);
+		$this->assertArrayHasKey('link', $response);
+	}
+}
+?>
diff --git a/tests/mock/responses/availabilities.delete.success b/tests/mock/responses/availabilities.delete.success
new file mode 100644
index 0000000..e0ebfc2
--- /dev/null
+++ b/tests/mock/responses/availabilities.delete.success
@@ -0,0 +1,15 @@
+HTTP/1.1 202 OK
+Cache-Control: private, no-cache
+Content-Type: application/json; charset=utf-8
+Last-Modified: Tue, 31 Mar 2015 14:18:15 GMT
+P3p: CP="This is not a P3P policy!"
+Vary: Cookie
+X-Content-Type-Options: nosniff
+X-Frame-Options: SAMEORIGIN
+X-Ua-Compatible: IE=edge
+X-Xss-Protection: 1; mode=block
+Date: Tue, 25 Mar 2024 14:18:15 GMT
+
+{
+    "kind": "store#availabilities/deleteResponse"
+}
\ No newline at end of file
diff --git a/tests/mock/responses/availabilities.get.not_found b/tests/mock/responses/availabilities.get.not_found
new file mode 100644
index 0000000..004094c
--- /dev/null
+++ b/tests/mock/responses/availabilities.get.not_found
@@ -0,0 +1,17 @@
+HTTP/1.1 200
+Cache-Control: private, no-cache
+Content-Type: application/json; charset=utf-8
+Last-Modified: Tue, 31 Mar 2015 14:15:25 GMT
+P3p: CP="This is not a P3P policy!"
+Vary: Cookie
+X-Content-Type-Options: nosniff
+X-Frame-Options: SAMEORIGIN
+X-Ua-Compatible: IE=edge
+X-Xss-Protection: 1; mode=block
+Date: Tue, 31 Mar 2015 14:15:25 GMT
+
+{
+    "kind": "store#availabilities/getResponse",
+    "items": null,
+    "Error": null
+}
diff --git a/tests/mock/responses/availabilities.get.success b/tests/mock/responses/availabilities.get.success
new file mode 100644
index 0000000..5a77f9e
--- /dev/null
+++ b/tests/mock/responses/availabilities.get.success
@@ -0,0 +1,45 @@
+HTTP/1.1 200 OK
+Cache-Control: private, no-cache
+Content-Type: application/json; charset=utf-8
+Last-Modified: Tue, 31 Mar 2015 14:18:15 GMT
+P3p: CP="This is not a P3P policy!"
+Vary: Cookie
+X-Content-Type-Options: nosniff
+X-Frame-Options: SAMEORIGIN
+X-Ua-Compatible: IE=edge
+X-Xss-Protection: 1; mode=block
+Date: Tue, 25 Mar 2024 14:18:15 GMT
+
+{
+    "kind": "store#availabilities/getResponse",
+    "Error": null,
+    "items": [
+        {
+            "message": "in stock",
+            "mpcc": "meplato",
+            "quantity": 15.3,
+            "region": "UK",
+            "spn": "1234",
+            "updated": "Q4/2022",
+            "zipCode": "04109"
+        },
+       {
+            "message": "in stock",
+            "mpcc": "meplato",
+            "quantity": 35.0,
+            "region": "DK",
+            "spn": "1234",
+            "updated": "Q4/2022",
+            "zipCode": "05109"
+        },
+        {
+            "message": "in stock",
+            "mpcc": "meplato",
+            "quantity": 20.4,
+            "region": "DE",
+            "spn": "1234",
+            "updated": "Q4/2022",
+            "zipCode": "06109"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/tests/mock/responses/availabilities.upsert.success b/tests/mock/responses/availabilities.upsert.success
new file mode 100644
index 0000000..9590369
--- /dev/null
+++ b/tests/mock/responses/availabilities.upsert.success
@@ -0,0 +1,16 @@
+HTTP/1.1 202 OK
+Cache-Control: private, no-cache
+Content-Type: application/json; charset=utf-8
+Last-Modified: Tue, 31 Mar 2015 14:18:15 GMT
+P3p: CP="This is not a P3P policy!"
+Vary: Cookie
+X-Content-Type-Options: nosniff
+X-Frame-Options: SAMEORIGIN
+X-Ua-Compatible: IE=edge
+X-Xss-Protection: 1; mode=block
+Date: Tue, 25 Mar 2024 14:18:15 GMT
+
+{
+    "kind": "store#availabilities/upsertResponse",
+    "link": "string"
+}
\ No newline at end of file