diff --git a/src/Mailgun/Api/Attachment.php b/src/Mailgun/Api/Attachment.php
new file mode 100644
index 0000000..008aef9
--- /dev/null
+++ b/src/Mailgun/Api/Attachment.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Api;
+
+use Mailgun\Assert;
+use Mailgun\Model\Attachment\Attachment as Model;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class Attachment extends HttpApi
+{
+    /**
+     * @param string $url
+     *
+     * @return Model
+     */
+    public function show($url)
+    {
+        Assert::stringNotEmpty($url);
+        Assert::regex($url, '@https://.*mailgun\.(net|org)/v.+@');
+        Assert::regex($url, '|/attachments/[0-9]+|');
+
+        $response = $this->httpGet($url);
+
+        return $this->hydrateResponse($response, Model::class);
+    }
+}
diff --git a/src/Mailgun/Mailgun.php b/src/Mailgun/Mailgun.php
index 561f607..4bab3c7 100644
--- a/src/Mailgun/Mailgun.php
+++ b/src/Mailgun/Mailgun.php
@@ -326,6 +326,14 @@ class Mailgun
         return new Api\Stats($this->httpClient, $this->requestBuilder, $this->hydrator);
     }
 
+    /**
+     * @return Api\Attachment
+     */
+    public function attachment()
+    {
+        return new Api\Attachment($this->httpClient, $this->requestBuilder, $this->hydrator);
+    }
+
     /**
      * @return Api\Domain
      */
diff --git a/src/Mailgun/Model/Attachment/Attachment.php b/src/Mailgun/Model/Attachment/Attachment.php
new file mode 100644
index 0000000..f9ebe7e
--- /dev/null
+++ b/src/Mailgun/Model/Attachment/Attachment.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Attachment;
+
+use Mailgun\Model\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class Attachment implements ApiResponse
+{
+    private $data;
+
+    public static function create(array $data)
+    {
+        $new = new self();
+        $new->data = $data;
+
+        return $new;
+    }
+
+    public function getData()
+    {
+        return $this->data;
+    }
+}
diff --git a/tests/Api/AttachmentTest.php b/tests/Api/AttachmentTest.php
new file mode 100644
index 0000000..7f1db98
--- /dev/null
+++ b/tests/Api/AttachmentTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Tests\Api;
+
+use Mailgun\Api\Attachment;
+use Mailgun\Exception\InvalidArgumentException;
+use Mailgun\Model\Attachment\Attachment as Model;
+
+class AttachmentTest extends TestCase
+{
+    protected function getApiClass()
+    {
+        return Attachment::class;
+    }
+
+    public function testShow()
+    {
+        $uri = 'https://api.mailgun.org/v2/domains/mydomain.com/messages/WyJhOTM2NDk1ODA3Iiw/attachments/0';
+        $this->setRequestMethod('GET');
+        $this->setHydrateClass(Model::class);
+        $this->setRequestUri($uri);
+
+        $api = $this->getApiInstance();
+        $api->show($uri);
+    }
+
+    public function testShowWrongUri()
+    {
+        $api = $this->getApiInstance();
+        $this->expectException(InvalidArgumentException::class);
+        $api->show('https://api.mailgun.org/v2/domains/mydomain.com');
+    }
+
+    public function testShowNonMailgunUri()
+    {
+        $api = $this->getApiInstance();
+        $this->expectException(InvalidArgumentException::class);
+        $api->show('https://example.com/v2/domains/mailgun.net?x=attachments/0');
+    }
+}
diff --git a/tests/Api/TagTest.php b/tests/Api/TagTest.php
index c6f1755..6fd83d8 100644
--- a/tests/Api/TagTest.php
+++ b/tests/Api/TagTest.php
@@ -7,7 +7,7 @@
  * of the MIT license. See the LICENSE file for details.
  */
 
-namespace Mailgun\tests\Api;
+namespace Mailgun\Tests\Api;
 
 use GuzzleHttp\Psr7\Response;
 use Mailgun\Api\Tag;
diff --git a/tests/Model/BaseModelTest.php b/tests/Model/BaseModelTest.php
index 5fa268d..5b73f0e 100644
--- a/tests/Model/BaseModelTest.php
+++ b/tests/Model/BaseModelTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/ConnectionResponseTest.php b/tests/Model/Domain/ConnectionResponseTest.php
index 78fecd0..a42b31c 100644
--- a/tests/Model/Domain/ConnectionResponseTest.php
+++ b/tests/Model/Domain/ConnectionResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CreateCredentialResponseTest.php b/tests/Model/Domain/CreateCredentialResponseTest.php
index 59b3fff..7eaf2a3 100644
--- a/tests/Model/Domain/CreateCredentialResponseTest.php
+++ b/tests/Model/Domain/CreateCredentialResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CreateResponseTest.php b/tests/Model/Domain/CreateResponseTest.php
index fe553a6..8977825 100644
--- a/tests/Model/Domain/CreateResponseTest.php
+++ b/tests/Model/Domain/CreateResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CredentialResponseItemTest.php b/tests/Model/Domain/CredentialResponseItemTest.php
index 6be18bf..8e1512b 100644
--- a/tests/Model/Domain/CredentialResponseItemTest.php
+++ b/tests/Model/Domain/CredentialResponseItemTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CredentialResponseTest.php b/tests/Model/Domain/CredentialResponseTest.php
index 1467d99..e33f6ca 100644
--- a/tests/Model/Domain/CredentialResponseTest.php
+++ b/tests/Model/Domain/CredentialResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DeleteCredentialResponseTest.php b/tests/Model/Domain/DeleteCredentialResponseTest.php
index b98048f..3841c73 100644
--- a/tests/Model/Domain/DeleteCredentialResponseTest.php
+++ b/tests/Model/Domain/DeleteCredentialResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DeleteResponseTest.php b/tests/Model/Domain/DeleteResponseTest.php
index 4397416..27bf80b 100644
--- a/tests/Model/Domain/DeleteResponseTest.php
+++ b/tests/Model/Domain/DeleteResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DnsRecordTest.php b/tests/Model/Domain/DnsRecordTest.php
index 94a4dd4..8f0a9ee 100644
--- a/tests/Model/Domain/DnsRecordTest.php
+++ b/tests/Model/Domain/DnsRecordTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DomainTest.php b/tests/Model/Domain/DomainTest.php
index 890dd60..7db16a8 100644
--- a/tests/Model/Domain/DomainTest.php
+++ b/tests/Model/Domain/DomainTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/IndexResponseTest.php b/tests/Model/Domain/IndexResponseTest.php
index d24f2dc..ab84b95 100644
--- a/tests/Model/Domain/IndexResponseTest.php
+++ b/tests/Model/Domain/IndexResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/ShowResponseTest.php b/tests/Model/Domain/ShowResponseTest.php
index 04782a3..497b525 100644
--- a/tests/Model/Domain/ShowResponseTest.php
+++ b/tests/Model/Domain/ShowResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/UpdateConnectionResponseTest.php b/tests/Model/Domain/UpdateConnectionResponseTest.php
index 0d0bf87..87d9591 100644
--- a/tests/Model/Domain/UpdateConnectionResponseTest.php
+++ b/tests/Model/Domain/UpdateConnectionResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/UpdateCredentialResponseTest.php b/tests/Model/Domain/UpdateCredentialResponseTest.php
index 7f7d071..9473aa8 100644
--- a/tests/Model/Domain/UpdateCredentialResponseTest.php
+++ b/tests/Model/Domain/UpdateCredentialResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/VerifyResponseTest.php b/tests/Model/Domain/VerifyResponseTest.php
index 86f2cd5..977002a 100644
--- a/tests/Model/Domain/VerifyResponseTest.php
+++ b/tests/Model/Domain/VerifyResponseTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * Copyright (C) 2013 Mailgun
  *