diff --git a/src/Mailgun/Api/AbstractApi.php b/src/Mailgun/Api/AbstractApi.php
index 88ceed4..2259a0c 100644
--- a/src/Mailgun/Api/AbstractApi.php
+++ b/src/Mailgun/Api/AbstractApi.php
@@ -71,7 +71,7 @@ abstract class AbstractApi
      *
      * @return ResponseInterface
      */
-    protected function get($path, array $parameters = [], array $requestHeaders = [])
+    protected function httpGet($path, array $parameters = [], array $requestHeaders = [])
     {
         if (count($parameters) > 0) {
             $path .= '?'.http_build_query($parameters);
@@ -95,9 +95,9 @@ abstract class AbstractApi
      *
      * @return ResponseInterface
      */
-    protected function post($path, array $parameters = [], array $requestHeaders = [])
+    protected function httpPost($path, array $parameters = [], array $requestHeaders = [])
     {
-        return $this->postRaw($path, $this->createJsonBody($parameters), $requestHeaders);
+        return $this->httpPostRaw($path, $this->createJsonBody($parameters), $requestHeaders);
     }
 
     /**
@@ -123,7 +123,7 @@ abstract class AbstractApi
      *
      * @return ResponseInterface
      */
-    protected function postRaw($path, $body, array $requestHeaders = [])
+    protected function httpPostRaw($path, $body, array $requestHeaders = [])
     {
         try {
             $response = $this->httpClient->post($path, $requestHeaders, $body);
@@ -143,7 +143,7 @@ abstract class AbstractApi
      *
      * @return ResponseInterface
      */
-    protected function put($path, array $parameters = [], array $requestHeaders = [])
+    protected function httpPut($path, array $parameters = [], array $requestHeaders = [])
     {
         try {
             $response = $this->httpClient->put($path, $requestHeaders, $this->createJsonBody($parameters));
@@ -177,7 +177,7 @@ abstract class AbstractApi
      *
      * @return ResponseInterface
      */
-    protected function delete($path, array $parameters = [], array $requestHeaders = [])
+    protected function httpDelete($path, array $parameters = [], array $requestHeaders = [])
     {
         try {
             $response = $this->httpClient->delete($path, $requestHeaders, $this->createJsonBody($parameters));
diff --git a/src/Mailgun/Api/Domain.php b/src/Mailgun/Api/Domain.php
index d0244fc..037d09e 100644
--- a/src/Mailgun/Api/Domain.php
+++ b/src/Mailgun/Api/Domain.php
@@ -10,13 +10,17 @@
 namespace Mailgun\Api;
 
 use Mailgun\Assert;
-use Mailgun\Resource\Api\Domain\ComplexDomain;
-use Mailgun\Resource\Api\Domain\Credential;
-use Mailgun\Resource\Api\Domain\CredentialListResponse;
-use Mailgun\Resource\Api\Domain\DeliverySettingsResponse;
-use Mailgun\Resource\Api\Domain\DeliverySettingsUpdateResponse;
-use Mailgun\Resource\Api\Domain\DomainListResponse;
-use Mailgun\Resource\Api\SimpleResponse;
+use Mailgun\Resource\Api\Domain\CreateCredentialResponse;
+use Mailgun\Resource\Api\Domain\CreateResponse;
+use Mailgun\Resource\Api\Domain\DeleteCredentialResponse;
+use Mailgun\Resource\Api\Domain\DeleteResponse;
+use Mailgun\Resource\Api\Domain\ShowResponse;
+use Mailgun\Resource\Api\Domain\CredentialResponse;
+use Mailgun\Resource\Api\Domain\ConnectionResponse;
+use Mailgun\Resource\Api\Domain\UpdateConnectionResponse;
+use Mailgun\Resource\Api\Domain\IndexResponse;
+use Mailgun\Resource\Api\Domain\UpdateCredentialResponse;
+use Psr\Http\Message\ResponseInterface;
 
 /**
  * {@link https://documentation.mailgun.com/api-domains.html}.
@@ -31,9 +35,9 @@ class Domain extends AbstractApi
      * @param int $limit
      * @param int $skip
      *
-     * @return DomainListResponse
+     * @return IndexResponse
      */
-    public function listAll($limit = 100, $skip = 0)
+    public function index($limit = 100, $skip = 0)
     {
         Assert::integer($limit);
         Assert::integer($skip);
@@ -43,9 +47,9 @@ class Domain extends AbstractApi
             'skip' => $skip,
         ];
 
-        $response = $this->get('/v3/domains', $params);
+        $response = $this->httpGet('/v3/domains', $params);
 
-        return $this->serializer->deserialize($response, DomainListResponse::class);
+        return $this->serializer->deserialize($response, IndexResponse::class);
     }
 
     /**
@@ -53,15 +57,15 @@ class Domain extends AbstractApi
      *
      * @param string $domain Name of the domain.
      *
-     * @return ComplexDomain|array|ResponseInterface
+     * @return ShowResponse|array|ResponseInterface
      */
-    public function info($domain)
+    public function show($domain)
     {
         Assert::stringNotEmpty($domain);
 
-        $response = $this->get(sprintf('/v3/domains/%s', $domain));
+        $response = $this->httpGet(sprintf('/v3/domains/%s', $domain));
 
-        return $this->serializer->deserialize($response, ComplexDomain::class);
+        return $this->serializer->deserialize($response, ShowResponse::class);
     }
 
     /**
@@ -74,7 +78,7 @@ class Domain extends AbstractApi
      * @param string $spamAction `disable` or `tag` - inbound spam filtering.
      * @param bool   $wildcard   Domain will accept email for subdomains.
      *
-     * @return ComplexDomain|array|ResponseInterface
+     * @return CreateResponse|array|ResponseInterface
      */
     public function create($domain, $smtpPass, $spamAction, $wildcard)
     {
@@ -93,7 +97,7 @@ class Domain extends AbstractApi
 
         $response = $this->postMultipart('/v3/domains', $params);
 
-        return $this->safeDeserialize($response, ComplexDomain::class);
+        return $this->safeDeserialize($response, CreateResponse::class);
     }
 
     /**
@@ -102,15 +106,15 @@ class Domain extends AbstractApi
      *
      * @param string $domain Name of the domain.
      *
-     * @return SimpleResponse|array|ResponseInterface
+     * @return DeleteResponse|array|ResponseInterface
      */
-    public function remove($domain)
+    public function delete($domain)
     {
         Assert::stringNotEmpty($domain);
 
-        $response = $this->delete(sprintf('/v3/domains/%s', $domain));
+        $response = $this->httpDelete(sprintf('/v3/domains/%s', $domain));
 
-        return $this->serializer->deserialize($response, SimpleResponse::class);
+        return $this->serializer->deserialize($response, DeleteResponse::class);
     }
 
     /**
@@ -120,9 +124,9 @@ class Domain extends AbstractApi
      * @param int    $limit  Number of credentials to return
      * @param int    $skip   Number of credentials to omit from the list
      *
-     * @return CredentialsListResponse
+     * @return CredentialResponse
      */
-    public function listCredentials($domain, $limit = 100, $skip = 0)
+    public function credentials($domain, $limit = 100, $skip = 0)
     {
         Assert::stringNotEmpty($domain);
         Assert::integer($limit);
@@ -133,9 +137,9 @@ class Domain extends AbstractApi
             'skip' => $skip,
         ];
 
-        $response = $this->get(sprintf('/v3/domains/%s/credentials', $domain), $params);
+        $response = $this->httpGet(sprintf('/v3/domains/%s/credentials', $domain), $params);
 
-        return $this->safeDeserialize($response, CredentialListResponse::class);
+        return $this->safeDeserialize($response, CredentialResponse::class);
     }
 
     /**
@@ -145,9 +149,9 @@ class Domain extends AbstractApi
      * @param string $login    SMTP Username.
      * @param string $password SMTP Password. Length min 5, max 32.
      *
-     * @return Credential|array|ResponseInterface
+     * @return CreateCredentialResponse|array|ResponseInterface
      */
-    public function newCredential($domain, $login, $password)
+    public function createCredential($domain, $login, $password)
     {
         Assert::stringNotEmpty($domain);
         Assert::stringNotEmpty($login);
@@ -161,7 +165,7 @@ class Domain extends AbstractApi
 
         $response = $this->postMultipart(sprintf('/v3/domains/%s/credentials', $domain), $params);
 
-        return $this->serializer->deserialize($response, SimpleResponse::class);
+        return $this->serializer->deserialize($response, CreateCredentialResponse::class);
     }
 
     /**
@@ -171,7 +175,7 @@ class Domain extends AbstractApi
      * @param string $login  SMTP Username.
      * @param string $pass   New SMTP Password. Length min 5, max 32.
      *
-     * @return SimpleResponse|array|ResponseInterface
+     * @return UpdateCredentialResponse|array|ResponseInterface
      */
     public function updateCredential($domain, $login, $pass)
     {
@@ -193,7 +197,7 @@ class Domain extends AbstractApi
             $params
         );
 
-        return $this->serializer->deserialize($response, SimpleResponse::class);
+        return $this->serializer->deserialize($response, UpdateCredentialResponse::class);
     }
 
     /**
@@ -202,7 +206,7 @@ class Domain extends AbstractApi
      * @param string $domain Name of the domain.
      * @param string $login  SMTP Username.
      *
-     * @return SimpleResponse|array|ResponseInterface
+     * @return DeleteCredentialResponse|array|ResponseInterface
      */
     public function deleteCredential($domain, $login)
     {
@@ -217,7 +221,7 @@ class Domain extends AbstractApi
             )
         );
 
-        return $this->serializer->deserialize($response, SimpleResponse::class);
+        return $this->serializer->deserialize($response, DeleteCredentialResponse::class);
     }
 
     /**
@@ -225,15 +229,15 @@ class Domain extends AbstractApi
      *
      * @param string $domain Name of the domain.
      *
-     * @return DeliverySettingsResponse|array|ResponseInterface
+     * @return ConnectionResponse|array|ResponseInterface
      */
-    public function getDeliverySettings($domain)
+    public function connection($domain)
     {
         Assert::stringNotEmpty($domain);
 
-        $response = $this->get(sprintf('/v3/domains/%s/connection', $domain));
+        $response = $this->httpGet(sprintf('/v3/domains/%s/connection', $domain));
 
-        return $this->serializer->deserialize($response, DeliverySettingsResponse::class);
+        return $this->serializer->deserialize($response, ConnectionResponse::class);
     }
 
     /**
@@ -244,9 +248,9 @@ class Domain extends AbstractApi
      * @param bool|null $requireTLS Enforces that messages are sent only over a TLS connection.
      * @param bool|null $noVerify   Disables TLS certificate and hostname verification.
      *
-     * @return DeliverySettingsResponse|array|ResponseInterface
+     * @return UpdateConnectionResponse|array|ResponseInterface
      */
-    public function updateDeliverySettings($domain, $requireTLS, $noVerify)
+    public function updateConnection($domain, $requireTLS, $noVerify)
     {
         Assert::stringNotEmpty($domain);
         Assert::nullOrBoolean($requireTLS);
@@ -264,6 +268,6 @@ class Domain extends AbstractApi
 
         $response = $this->putMultipart(sprintf('/v3/domains/%s/connection', $domain), $params);
 
-        return $this->serializer->deserialize($response, DeliverySettingsUpdateResponse::class);
+        return $this->serializer->deserialize($response, UpdateConnectionResponse::class);
     }
 }
diff --git a/src/Mailgun/Api/Stats.php b/src/Mailgun/Api/Stats.php
index 8ec7c8d..4561b83 100644
--- a/src/Mailgun/Api/Stats.php
+++ b/src/Mailgun/Api/Stats.php
@@ -23,7 +23,7 @@ class Stats extends AbstractApi
     {
         Assert::stringNotEmpty($domain);
 
-        $response = $this->get(sprintf('/v3/%s/stats/total', rawurlencode($domain)), $params);
+        $response = $this->httpGet(sprintf('/v3/%s/stats/total', rawurlencode($domain)), $params);
 
         return $this->serializer->deserialize($response, TotalResponse::class);
     }
@@ -38,7 +38,7 @@ class Stats extends AbstractApi
     {
         Assert::stringNotEmpty($domain);
 
-        $response = $this->get(sprintf('/v3/%s/stats', rawurlencode($domain)), $params);
+        $response = $this->httpGet(sprintf('/v3/%s/stats', rawurlencode($domain)), $params);
 
         return $this->serializer->deserialize($response, AllResponse::class);
     }
diff --git a/src/Mailgun/Resource/Api/Domain/ComplexDomain.php b/src/Mailgun/Resource/Api/Domain/ComplexDomain.php
deleted file mode 100644
index cc8cc74..0000000
--- a/src/Mailgun/Resource/Api/Domain/ComplexDomain.php
+++ /dev/null
@@ -1,95 +0,0 @@
-<?php
-
-/**
- * Copyright (C) 2013-2016 Mailgun.
- *
- * This software may be modified and distributed under the terms
- * of the MIT license.  See the LICENSE file for details.
- */
-namespace Mailgun\Resource\Api\Domain;
-
-use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
-
-/**
- * ComplexDomain uses DomainTrait and exposes a "complex" constructor
- * where an array or \stdClass can be passed in to find the appropriate
- * fields.
- *
- * @author Sean Johnson <sean@mailgun.com>
- */
-class ComplexDomain implements CreatableFromArray
-{
-    /**
-     * @var SimpleDomain
-     */
-    private $domain;
-
-    /**
-     * @var DomainDnsRecord[]
-     */
-    private $inboundDnsRecords;
-
-    /**
-     * @var DomainDnsRecord[]
-     */
-    private $outboundDnsRecords;
-
-    /**
-     * @param array $data
-     *
-     * @return ComplexDomain
-     */
-    public static function createFromArray(array $data)
-    {
-        Assert::keyExists($data, 'domain');
-        Assert::keyExists($data, 'receiving_dns_records');
-        Assert::keyExists($data, 'sending_dns_records');
-
-        // Let DomainDnsRecord::createFromArray() handle validation of
-        // the `receiving_dns_records` and `sending_dns_records` data.
-        // Also let SimpleDomain::createFromArray() handle validation of
-        // the `domain` fields.
-        return new static(
-            SimpleDomain::createFromArray($data['domain']),
-            DomainDnsRecord::createFromArray($data['receiving_dns_records']),
-            DomainDnsRecord::createFromArray($data['sending_dns_records'])
-        );
-    }
-
-    /**
-     * @param SimpleDomain $domainInfo
-     * @param array        $rxRecords  Array of DomainDnsRecord instances
-     * @param array        $txRecords  Array of DomainDnsRecord instances
-     */
-    public function __construct(SimpleDomain $domainInfo, array $rxRecords, array $txRecords)
-    {
-        $this->domain = $domainInfo;
-        $this->inboundDnsRecords = $rxRecords;
-        $this->outboundDnsRecords = $txRecords;
-    }
-
-    /**
-     * @return SimpleDomain
-     */
-    public function getDomain()
-    {
-        return $this->domain;
-    }
-
-    /**
-     * @return DomainDnsRecord[]
-     */
-    public function getInboundDNSRecords()
-    {
-        return $this->inboundDnsRecords;
-    }
-
-    /**
-     * @return DomainDnsRecord[]
-     */
-    public function getOutboundDNSRecords()
-    {
-        return $this->outboundDnsRecords;
-    }
-}
diff --git a/src/Mailgun/Resource/Api/Domain/DeliverySettingsResponse.php b/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
similarity index 82%
rename from src/Mailgun/Resource/Api/Domain/DeliverySettingsResponse.php
rename to src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
index 9677073..ad0257c 100644
--- a/src/Mailgun/Resource/Api/Domain/DeliverySettingsResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
@@ -9,12 +9,12 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
  */
-class DeliverySettingsResponse implements CreatableFromArray
+final class ConnectionResponse implements ApiResponse
 {
     /**
      * @var bool
@@ -29,9 +29,9 @@ class DeliverySettingsResponse implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return DeliverySettingsResponse
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         Assert::keyExists($data, 'connection');
         Assert::isArray($data['connection']);
@@ -40,7 +40,7 @@ class DeliverySettingsResponse implements CreatableFromArray
         Assert::keyExists($connSettings, 'skip_verification');
         Assert::keyExists($connSettings, 'require_tls');
 
-        return new static(
+        return new self(
             $connSettings['skip_verification'],
             $connSettings['require_tls']
         );
@@ -50,7 +50,7 @@ class DeliverySettingsResponse implements CreatableFromArray
      * @param bool $noVerify   Disable remote TLS certificate verification
      * @param bool $requireTLS Requires TLS for all outbound communication
      */
-    public function __construct($noVerify, $requireTLS)
+    private function __construct($noVerify, $requireTLS)
     {
         $this->noVerify = $noVerify;
         $this->requireTLS = $requireTLS;
diff --git a/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php
new file mode 100644
index 0000000..1568243
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class CreateCredentialResponse implements ApiResponse
+{
+    /**
+     * @var string
+     */
+    private $message;
+
+    /**
+     * @param string $message
+     */
+    private function __construct($message)
+    {
+        $this->message = $message;
+    }
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        return new self($data['message']);
+    }
+
+    /**
+     * @return string
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/Domain/CreateResponse.php b/src/Mailgun/Resource/Api/Domain/CreateResponse.php
new file mode 100644
index 0000000..9eb3d20
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/CreateResponse.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Assert;
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class CreateResponse implements ApiResponse
+{
+    /**
+     * @var string
+     */
+    private $message;
+
+    /**
+     * @var Domain
+     */
+    private $domain;
+
+    /**
+     * @var DnsRecord[]
+     */
+    private $inboundDnsRecords;
+
+    /**
+     * @var DnsRecord[]
+     */
+    private $outboundDnsRecords;
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        Assert::keyExists($data, 'domain');
+        Assert::keyExists($data, 'message');
+        Assert::keyExists($data, 'receiving_dns_records');
+        Assert::keyExists($data, 'sending_dns_records');
+
+        $domain = Domain::create($data['domain']);
+        $rx = [];
+        $tx = [];
+
+        foreach ($data['receiving_dns_records'] as $item) {
+            $rx[] = DnsRecord::create($item);
+        }
+        foreach ($data['sending_dns_records'] as $item) {
+            $tx[] = DnsRecord::create($item);
+        }
+
+        return new self($domain, $rx, $tx, $data['message']);
+    }
+
+    /**
+     * @param Domain      $domainInfo
+     * @param DnsRecord[] $rxRecords
+     * @param DnsRecord[] $txRecords
+     * @param string      $message
+     */
+    private function __construct(Domain $domainInfo, array $rxRecords, array $txRecords, $message)
+    {
+        $this->domain = $domainInfo;
+        $this->inboundDnsRecords = $rxRecords;
+        $this->outboundDnsRecords = $txRecords;
+    }
+
+    /**
+     * @return Domain
+     */
+    public function getDomain()
+    {
+        return $this->domain;
+    }
+
+    /**
+     * @return DnsRecord[]
+     */
+    public function getInboundDNSRecords()
+    {
+        return $this->inboundDnsRecords;
+    }
+
+    /**
+     * @return DnsRecord[]
+     */
+    public function getOutboundDNSRecords()
+    {
+        return $this->outboundDnsRecords;
+    }
+
+    /**
+     * @return string
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/Domain/CredentialListResponse.php b/src/Mailgun/Resource/Api/Domain/CredentialResponse.php
similarity index 71%
rename from src/Mailgun/Resource/Api/Domain/CredentialListResponse.php
rename to src/Mailgun/Resource/Api/Domain/CredentialResponse.php
index e57cd38..1acb46b 100644
--- a/src/Mailgun/Resource/Api/Domain/CredentialListResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/CredentialResponse.php
@@ -10,12 +10,12 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
  */
-class CredentialListResponse implements CreatableFromArray
+final class CredentialResponse implements ApiResponse
 {
     /**
      * @var int
@@ -23,16 +23,16 @@ class CredentialListResponse implements CreatableFromArray
     private $totalCount;
 
     /**
-     * @var Credential[]
+     * @var CredentialResponseItem[]
      */
     private $items;
 
     /**
      * @param array $data
      *
-     * @return CredentialListResponse|array|ResponseInterface
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         $items = [];
 
@@ -40,17 +40,17 @@ class CredentialListResponse implements CreatableFromArray
         Assert::keyExists($data, 'items');
 
         foreach ($data['items'] as $item) {
-            $items[] = Credential::createFromArray($item);
+            $items[] = CredentialResponseItem::create($item);
         }
 
         return new self($data['total_count'], $items);
     }
 
     /**
-     * @param int          $totalCount
-     * @param Credential[] $items
+     * @param int                      $totalCount
+     * @param CredentialResponseItem[] $items
      */
-    public function __construct($totalCount, array $items)
+    private function __construct($totalCount, array $items)
     {
         Assert::integer($totalCount);
         Assert::isArray($items);
@@ -69,7 +69,7 @@ class CredentialListResponse implements CreatableFromArray
     }
 
     /**
-     * @return Credential[]
+     * @return CredentialResponseItem[]
      */
     public function getCredentials()
     {
diff --git a/src/Mailgun/Resource/Api/Domain/Credential.php b/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
similarity index 87%
rename from src/Mailgun/Resource/Api/Domain/Credential.php
rename to src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
index 55bbe07..1cd0ada 100644
--- a/src/Mailgun/Resource/Api/Domain/Credential.php
+++ b/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
@@ -9,12 +9,11 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
  */
-class Credential implements CreatableFromArray
+final class CredentialResponseItem
 {
     /**
      * @var int|null
@@ -39,9 +38,9 @@ class Credential implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return Credential
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         Assert::keyExists($data, 'created_at');
         Assert::keyExists($data, 'mailbox');
@@ -57,7 +56,7 @@ class Credential implements CreatableFromArray
         Assert::string($mailbox);
         Assert::string($login);
 
-        return new static(
+        return new self(
             $sizeBytes,
             $createdAt,
             $mailbox,
@@ -71,7 +70,7 @@ class Credential implements CreatableFromArray
      * @param string    $mailbox
      * @param string    $login
      */
-    public function __construct($sizeBytes, \DateTime $createdAt, $mailbox, $login)
+    private function __construct($sizeBytes, \DateTime $createdAt, $mailbox, $login)
     {
         $this->sizeBytes = $sizeBytes;
         $this->createdAt = $createdAt;
diff --git a/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php
new file mode 100644
index 0000000..56fd1a5
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class DeleteCredentialResponse implements ApiResponse
+{
+    /**
+     * @var string
+     */
+    private $message;
+
+    /**
+     * @var string
+     */
+    private $spec;
+
+    /**
+     * @param string $message
+     */
+    private function __construct($message, $spec)
+    {
+        $this->message = $message;
+        $this->spec = $spec;
+    }
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        return new self($data['message'], $data['spec']);
+    }
+
+    /**
+     * @return string
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+
+    /**
+     * @return string
+     */
+    public function getSpec()
+    {
+        return $this->spec;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/Domain/DeleteResponse.php b/src/Mailgun/Resource/Api/Domain/DeleteResponse.php
new file mode 100644
index 0000000..1833aab
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/DeleteResponse.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class DeleteResponse implements ApiResponse
+{
+    /**
+     * @var string
+     */
+    private $message;
+
+    /**
+     * @param string $message
+     */
+    private function __construct($message)
+    {
+        $this->message = $message;
+    }
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        return new self($data['message']);
+    }
+
+    /**
+     * @return string
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/Domain/DomainDnsRecord.php b/src/Mailgun/Resource/Api/Domain/DnsRecord.php
similarity index 67%
rename from src/Mailgun/Resource/Api/Domain/DomainDnsRecord.php
rename to src/Mailgun/Resource/Api/Domain/DnsRecord.php
index 0a4d1a3..9d47ded 100644
--- a/src/Mailgun/Resource/Api/Domain/DomainDnsRecord.php
+++ b/src/Mailgun/Resource/Api/Domain/DnsRecord.php
@@ -9,14 +9,13 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
 
 /**
  * Represents a single DNS record for a domain.
  *
  * @author Sean Johnson <sean@mailgun.com>
  */
-class DomainDnsRecord implements CreatableFromArray
+final class DnsRecord
 {
     /**
      * @var string|null
@@ -46,27 +45,20 @@ class DomainDnsRecord implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return DomainDnsRecord[]|array|ResponseInterface
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
-        $items = [];
+        $name = isset($data['name']) ? $data['name'] : null;
+        $priority = isset($data['priority']) ? $data['priority'] : null;
 
-        foreach ($data as $item) {
-            Assert::keyExists($item, 'record_type');
-            Assert::keyExists($item, 'value');
-            Assert::keyExists($item, 'valid');
+        Assert::nullOrString($name);
+        Assert::string($data['record_type']);
+        Assert::string($data['value']);
+        Assert::nullOrString($priority);
+        Assert::string($data['valid']);
 
-            $items[] = new static(
-                array_key_exists('name', $item) ? $item['name'] : null,
-                $item['record_type'],
-                $item['value'],
-                array_key_exists('priority', $item) ? $item['priority'] : null,
-                $item['valid']
-            );
-        }
-
-        return $items;
+        return new self($name, $data['record_type'], $data['value'], $priority, $data['valid']);
     }
 
     /**
@@ -76,14 +68,8 @@ class DomainDnsRecord implements CreatableFromArray
      * @param string|null $priority Record priority, used for MX
      * @param string      $valid    DNS record has been added to domain DNS?
      */
-    public function __construct($name, $type, $value, $priority, $valid)
+    private function __construct($name, $type, $value, $priority, $valid)
     {
-        Assert::nullOrString($name);
-        Assert::string($type);
-        Assert::string($value);
-        Assert::nullOrString($priority);
-        Assert::string($valid);
-
         $this->name = $name;
         $this->type = $type;
         $this->value = $value;
@@ -108,7 +94,7 @@ class DomainDnsRecord implements CreatableFromArray
     }
 
     /**
-     * @return value
+     * @return string
      */
     public function getValue()
     {
diff --git a/src/Mailgun/Resource/Api/Domain/SimpleDomain.php b/src/Mailgun/Resource/Api/Domain/Domain.php
similarity index 81%
rename from src/Mailgun/Resource/Api/Domain/SimpleDomain.php
rename to src/Mailgun/Resource/Api/Domain/Domain.php
index f78f8bc..fa8580f 100644
--- a/src/Mailgun/Resource/Api/Domain/SimpleDomain.php
+++ b/src/Mailgun/Resource/Api/Domain/Domain.php
@@ -9,14 +9,13 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
 
 /**
  * Represents domain information in its simplest form.
  *
  * @author Sean Johnson <sean@ramcloud.io>
  */
-class SimpleDomain implements CreatableFromArray
+final class Domain
 {
     /**
      * @var \DateTime
@@ -56,12 +55,10 @@ class SimpleDomain implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return SimpleDomain
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
-        Assert::isArray($data);
-
         Assert::keyExists($data, 'name');
         Assert::keyExists($data, 'smtp_login');
         Assert::keyExists($data, 'smtp_password');
@@ -70,7 +67,7 @@ class SimpleDomain implements CreatableFromArray
         Assert::keyExists($data, 'state');
         Assert::keyExists($data, 'created_at');
 
-        return new static(
+        return new self(
             $data['name'],
             $data['smtp_login'],
             $data['smtp_password'],
@@ -90,16 +87,8 @@ class SimpleDomain implements CreatableFromArray
      * @param string    $state
      * @param \DateTime $createdAt
      */
-    public function __construct($name, $smtpLogin, $smtpPassword, $wildcard, $spamAction, $state, \DateTime $createdAt)
+    private function __construct($name, $smtpLogin, $smtpPassword, $wildcard, $spamAction, $state, \DateTime $createdAt)
     {
-        Assert::string($name);
-        Assert::string($smtpLogin);
-        Assert::string($smtpPassword);
-        Assert::boolean($wildcard);
-        Assert::string($spamAction);
-        Assert::string($state);
-        Assert::isInstanceOf($createdAt, '\DateTime');
-
         $this->name = $name;
         $this->smtpLogin = $smtpLogin;
         $this->smtpPassword = $smtpPassword;
diff --git a/src/Mailgun/Resource/Api/Domain/DomainListResponse.php b/src/Mailgun/Resource/Api/Domain/IndexResponse.php
similarity index 55%
rename from src/Mailgun/Resource/Api/Domain/DomainListResponse.php
rename to src/Mailgun/Resource/Api/Domain/IndexResponse.php
index fd9a425..d0ad6e3 100644
--- a/src/Mailgun/Resource/Api/Domain/DomainListResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/IndexResponse.php
@@ -10,12 +10,12 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
  */
-class DomainListResponse implements CreatableFromArray
+final class IndexResponse implements ApiResponse
 {
     /**
      * @var int
@@ -30,9 +30,9 @@ class DomainListResponse implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return DomainListResponse|array|ResponseInterface
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         $items = [];
 
@@ -40,24 +40,7 @@ class DomainListResponse implements CreatableFromArray
         Assert::keyExists($data, 'items');
 
         foreach ($data['items'] as $item) {
-            Assert::keyExists($item, 'name');
-            Assert::keyExists($item, 'smtp_login');
-            Assert::keyExists($item, 'smtp_password');
-            Assert::keyExists($item, 'wildcard');
-            Assert::keyExists($item, 'spam_action');
-            Assert::keyExists($item, 'state');
-            Assert::keyExists($item, 'created_at');
-
-            $items[] = SimpleDomain::createFromArray($item);
-            $items[] = new SimpleDomain(
-                $item['name'],
-                $item['smtp_login'],
-                $item['smtp_password'],
-                $item['wildcard'],
-                $item['spam_action'],
-                $item['state'],
-                new \DateTime($item['created_at'])
-            );
+            $items[] = Domain::create($item);
         }
 
         return new self($data['total_count'], $items);
@@ -67,7 +50,7 @@ class DomainListResponse implements CreatableFromArray
      * @param int            $totalCount
      * @param SimpleDomain[] $items
      */
-    public function __construct($totalCount, array $items)
+    private function __construct($totalCount, array $items)
     {
         Assert::integer($totalCount);
         Assert::isArray($items);
diff --git a/src/Mailgun/Resource/Api/Domain/ShowResponse.php b/src/Mailgun/Resource/Api/Domain/ShowResponse.php
new file mode 100644
index 0000000..7c1d9fd
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/ShowResponse.php
@@ -0,0 +1,94 @@
+<?php
+
+/**
+ * Copyright (C) 2013-2016 Mailgun.
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Assert;
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Sean Johnson <sean@mailgun.com>
+ */
+final class ShowResponse implements ApiResponse
+{
+    /**
+     * @var Domain
+     */
+    private $domain;
+
+    /**
+     * @var DnsRecord[]
+     */
+    private $inboundDnsRecords;
+
+    /**
+     * @var DnsRecord[]
+     */
+    private $outboundDnsRecords;
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        Assert::keyExists($data, 'domain');
+        Assert::keyExists($data, 'receiving_dns_records');
+        Assert::keyExists($data, 'sending_dns_records');
+
+        $domain = Domain::create($data['domain']);
+        $rx = [];
+        $tx = [];
+
+        foreach ($data['receiving_dns_records'] as $item) {
+            $rx[] = DnsRecord::create($item);
+        }
+        foreach ($data['sending_dns_records'] as $item) {
+            $tx[] = DnsRecord::create($item);
+        }
+
+        return new self($domain, $rx, $tx);
+    }
+
+    /**
+     * @param Domain      $domainInfo
+     * @param DnsRecord[] $rxRecords
+     * @param DnsRecord[] $txRecords
+     */
+    private function __construct(Domain $domainInfo, array $rxRecords, array $txRecords)
+    {
+        $this->domain = $domainInfo;
+        $this->inboundDnsRecords = $rxRecords;
+        $this->outboundDnsRecords = $txRecords;
+    }
+
+    /**
+     * @return Domain
+     */
+    public function getDomain()
+    {
+        return $this->domain;
+    }
+
+    /**
+     * @return DnsRecord[]
+     */
+    public function getInboundDNSRecords()
+    {
+        return $this->inboundDnsRecords;
+    }
+
+    /**
+     * @return DnsRecord[]
+     */
+    public function getOutboundDNSRecords()
+    {
+        return $this->outboundDnsRecords;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/Domain/DeliverySettingsUpdateResponse.php b/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
similarity index 81%
rename from src/Mailgun/Resource/Api/Domain/DeliverySettingsUpdateResponse.php
rename to src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
index c6016fc..4b62598 100644
--- a/src/Mailgun/Resource/Api/Domain/DeliverySettingsUpdateResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
@@ -9,14 +9,18 @@
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
-use Mailgun\Resource\Api\SimpleResponse;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
  */
-class DeliverySettingsUpdateResponse extends SimpleResponse implements CreatableFromArray
+final class UpdateConnectionResponse implements ApiResponse
 {
+    /**
+     * @var string
+     */
+    private $message;
+
     /**
      * @var bool
      */
@@ -30,9 +34,9 @@ class DeliverySettingsUpdateResponse extends SimpleResponse implements Creatable
     /**
      * @param array $data
      *
-     * @return SettingsUpdateResponse
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         Assert::keyExists($data, 'message');
         Assert::keyExists($data, 'skip_verification');
@@ -46,7 +50,7 @@ class DeliverySettingsUpdateResponse extends SimpleResponse implements Creatable
         Assert::boolean($noVerify);
         Assert::boolean($requireTLS);
 
-        return new static(
+        return new self(
             $message,
             $noVerify,
             $requireTLS
@@ -58,7 +62,7 @@ class DeliverySettingsUpdateResponse extends SimpleResponse implements Creatable
      * @param bool   $noVerify
      * @param bool   $requireTLS
      */
-    public function __construct($message, $noVerify, $requireTLS)
+    private function __construct($message, $noVerify, $requireTLS)
     {
         $this->message = $message;
         $this->noVerify = $noVerify;
diff --git a/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php
new file mode 100644
index 0000000..ffbb912
--- /dev/null
+++ b/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Mailgun\Resource\Api\Domain;
+
+use Mailgun\Resource\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class UpdateCredentialResponse implements ApiResponse
+{
+    /**
+     * @var string
+     */
+    private $message;
+
+    /**
+     * @param string $message
+     */
+    private function __construct($message)
+    {
+        $this->message = $message;
+    }
+
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        return new self($data['message']);
+    }
+
+    /**
+     * @return string
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+}
diff --git a/src/Mailgun/Resource/Api/SimpleResponse.php b/src/Mailgun/Resource/Api/SimpleResponse.php
deleted file mode 100644
index bb11999..0000000
--- a/src/Mailgun/Resource/Api/SimpleResponse.php
+++ /dev/null
@@ -1,99 +0,0 @@
-<?php
-
-/**
- * Copyright (C) 2013-2016 Mailgun.
- *
- * This software may be modified and distributed under the terms
- * of the MIT license.  See the LICENSE file for details.
- */
-namespace Mailgun\Resource\Api;
-
-use Mailgun\Assert;
-use Mailgun\Resource\CreatableFromArray;
-
-/**
- * @author Sean Johnson <sean@mailgun.com>
- */
-class SimpleResponse implements CreatableFromArray
-{
-    /**
-     * @var string
-     */
-    private $message;
-
-    /**
-     * Only set when API rate limit is hit and a rate limit response is returned.
-     *
-     * @var int
-     */
-    private $retrySeconds = null;
-
-    /**
-     * Only set on calls such as DELETE /v3/domains/.../credentials/<user>.
-     *
-     * @var string
-     */
-    private $spec = null;
-
-    /**
-     * @param array $data
-     *
-     * @return SimpleResponse
-     */
-    public static function createFromArray(array $data)
-    {
-        $message = array_key_exists('message', $data) ? $data['message'] : null;
-        $retrySeconds = array_key_exists('retry_seconds', $data) ? $data['retry_seconds'] : null;
-        $spec = array_key_exists('spec', $data) ? $data['spec'] : null;
-
-        return new static($message, $retrySeconds, $spec);
-    }
-
-    /**
-     * @param string|null $message
-     * @param int|null    $retrySeconds
-     * @param string|null $spec
-     */
-    public function __construct($message, $retrySeconds, $spec)
-    {
-        Assert::nullOrString($message);
-        Assert::nullOrInteger($retrySeconds);
-        Assert::nullOrString($spec);
-
-        $this->message = $message;
-        $this->retrySeconds = $retrySeconds;
-        $this->spec = $spec;
-    }
-
-    /**
-     * @return string
-     */
-    public function getMessage()
-    {
-        return $this->message;
-    }
-
-    /**
-     * @return string
-     */
-    public function getSpec()
-    {
-        return $this->spec;
-    }
-
-    /**
-     * @return bool
-     */
-    public function isRateLimited()
-    {
-        return null !== $this->retrySeconds;
-    }
-
-    /**
-     * @return int
-     */
-    public function getRetrySeconds()
-    {
-        return $this->retrySeconds;
-    }
-}
diff --git a/src/Mailgun/Resource/Api/Stats/AllResponse.php b/src/Mailgun/Resource/Api/Stats/AllResponse.php
index d6dcd42..3818fe8 100644
--- a/src/Mailgun/Resource/Api/Stats/AllResponse.php
+++ b/src/Mailgun/Resource/Api/Stats/AllResponse.php
@@ -2,12 +2,12 @@
 
 namespace Mailgun\Resource\Api\Stats;
 
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  */
-class AllResponse implements CreatableFromArray
+final class AllResponse implements ApiResponse
 {
     /**
      * @var int
@@ -15,15 +15,15 @@ class AllResponse implements CreatableFromArray
     private $totalCount;
 
     /**
-     * @var Item[]
+     * @var AllResponseItem[]
      */
     private $items;
 
     /**
-     * @param int    $totalCount
-     * @param Item[] $items
+     * @param int               $totalCount
+     * @param AllResponseItem[] $items
      */
-    public function __construct($totalCount, array $items)
+    private function __construct($totalCount, array $items)
     {
         $this->totalCount = $totalCount;
         $this->items = $items;
@@ -32,13 +32,13 @@ class AllResponse implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return AllResponse
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         $items = [];
         foreach ($data['items'] as $i) {
-            $items[] = new Item($i['id'], $i['event'], $i['total_count'], $i['tags'], new \DateTime($i['created_at']));
+            $items[] = AllResponseItem::create($i);
         }
 
         return new self($data['total_count'], $items);
@@ -53,7 +53,7 @@ class AllResponse implements CreatableFromArray
     }
 
     /**
-     * @return Item[]
+     * @return AllResponseItem[]
      */
     public function getItems()
     {
diff --git a/src/Mailgun/Resource/Api/Stats/Item.php b/src/Mailgun/Resource/Api/Stats/AllResponseItem.php
similarity index 65%
rename from src/Mailgun/Resource/Api/Stats/Item.php
rename to src/Mailgun/Resource/Api/Stats/AllResponseItem.php
index f20ed39..aa595ef 100644
--- a/src/Mailgun/Resource/Api/Stats/Item.php
+++ b/src/Mailgun/Resource/Api/Stats/AllResponseItem.php
@@ -2,7 +2,12 @@
 
 namespace Mailgun\Resource\Api\Stats;
 
-class Item
+use Mailgun\Assert;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class AllResponseItem
 {
     /**
      * @var string
@@ -29,6 +34,22 @@ class Item
      */
     private $createdAt;
 
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        Assert::string($data['id']);
+        Assert::string($data['event']);
+        Assert::string($data['total_count']);
+        Assert::isArray($data['tags']);
+        Assert::string($data['created_at']);
+
+        return new self($data['id'], $data['event'], $data['total_count'], $data['tags'], new \DateTime($data['created_at']));
+    }
+
     /**
      * @param string    $id
      * @param string    $event
@@ -36,7 +57,7 @@ class Item
      * @param \string[] $tags
      * @param \DateTime $createdAt
      */
-    public function __construct($id, $event, $totalCount, array $tags, \DateTime $createdAt)
+    private function __construct($id, $event, $totalCount, array $tags, \DateTime $createdAt)
     {
         $this->id = $id;
         $this->event = $event;
diff --git a/src/Mailgun/Resource/Api/Stats/TotalResponse.php b/src/Mailgun/Resource/Api/Stats/TotalResponse.php
index 1bfc1e8..bc98307 100644
--- a/src/Mailgun/Resource/Api/Stats/TotalResponse.php
+++ b/src/Mailgun/Resource/Api/Stats/TotalResponse.php
@@ -2,12 +2,12 @@
 
 namespace Mailgun\Resource\Api\Stats;
 
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  */
-class TotalResponse implements CreatableFromArray
+final class TotalResponse implements ApiResponse
 {
     /**
      * @var \DateTime
@@ -25,17 +25,17 @@ class TotalResponse implements CreatableFromArray
     private $resolution;
 
     /**
-     * @var TotalStats[]
+     * @var TotalResponseItem[]
      */
     private $stats;
 
     /**
-     * @param \DateTime    $start
-     * @param \DateTime    $end
-     * @param string       $resolution
-     * @param TotalStats[] $stats
+     * @param \DateTime           $start
+     * @param \DateTime           $end
+     * @param string              $resolution
+     * @param TotalResponseItem[] $stats
      */
-    public function __construct(\DateTime $start, \DateTime $end, $resolution, array $stats)
+    private function __construct(\DateTime $start, \DateTime $end, $resolution, array $stats)
     {
         $this->start = $start;
         $this->end = $end;
@@ -46,13 +46,13 @@ class TotalResponse implements CreatableFromArray
     /**
      * @param array $data
      *
-     * @return TotalResponse
+     * @return self
      */
-    public static function createFromArray(array $data)
+    public static function create(array $data)
     {
         $stats = [];
         foreach ($data['stats'] as $s) {
-            $stats[] = new TotalStats(new \DateTime($s['time']), $s['accepted'], $s['delivered'], $s['failed']);
+            $stats[] = TotalResponseItem::create($s);
         }
 
         return new self(new \DateTime($data['start']), new \DateTime($data['end']), $data['resolution'], $stats);
@@ -83,7 +83,7 @@ class TotalResponse implements CreatableFromArray
     }
 
     /**
-     * @return TotalStats[]
+     * @return TotalResponseItem[]
      */
     public function getStats()
     {
diff --git a/src/Mailgun/Resource/Api/Stats/TotalStats.php b/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
similarity index 66%
rename from src/Mailgun/Resource/Api/Stats/TotalStats.php
rename to src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
index f04d714..83733dd 100644
--- a/src/Mailgun/Resource/Api/Stats/TotalStats.php
+++ b/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
@@ -2,10 +2,12 @@
 
 namespace Mailgun\Resource\Api\Stats;
 
+use Mailgun\Assert;
+
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  */
-class TotalStats
+class TotalResponseItem
 {
     /**
      * @var \DateTime
@@ -27,13 +29,28 @@ class TotalStats
      */
     private $failed;
 
+    /**
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data)
+    {
+        Assert::string($data['time']);
+        Assert::isArray($data['accepted']);
+        Assert::isArray($data['delivered']);
+        Assert::isArray($data['failed']);
+
+        return new self(new \DateTime($data['time']), $data['accepted'], $data['delivered'], $data['failed']);
+    }
+
     /**
      * @param \DateTime $time
      * @param array     $accepted
      * @param array     $delivered
      * @param array     $failed
      */
-    public function __construct(\DateTime $time, array $accepted, array $delivered, array $failed)
+    private function __construct(\DateTime $time, array $accepted, array $delivered, array $failed)
     {
         $this->time = $time;
         $this->accepted = $accepted;
diff --git a/src/Mailgun/Resource/ApiResponse.php b/src/Mailgun/Resource/ApiResponse.php
new file mode 100644
index 0000000..b468505
--- /dev/null
+++ b/src/Mailgun/Resource/ApiResponse.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Mailgun\Resource;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+interface ApiResponse
+{
+    /**
+     * Create an API response object from the HTTP response from the API server.
+     *
+     * @param array $data
+     *
+     * @return self
+     */
+    public static function create(array $data);
+}
diff --git a/src/Mailgun/Resource/CreatableFromArray.php b/src/Mailgun/Resource/CreatableFromArray.php
deleted file mode 100644
index 1ef9e57..0000000
--- a/src/Mailgun/Resource/CreatableFromArray.php
+++ /dev/null
@@ -1,13 +0,0 @@
-<?php
-
-namespace Mailgun\Resource;
-
-interface CreatableFromArray
-{
-    /**
-     * @param array $data
-     *
-     * @return self
-     */
-    public static function createFromArray(array $data);
-}
diff --git a/src/Mailgun/Serializer/ObjectSerializer.php b/src/Mailgun/Serializer/ObjectSerializer.php
index 6e1b312..bf0064d 100644
--- a/src/Mailgun/Serializer/ObjectSerializer.php
+++ b/src/Mailgun/Serializer/ObjectSerializer.php
@@ -3,7 +3,7 @@
 namespace Mailgun\Serializer;
 
 use Mailgun\Exception\SerializeException;
-use Mailgun\Resource\CreatableFromArray;
+use Mailgun\Resource\ApiResponse;
 use Psr\Http\Message\ResponseInterface;
 
 /**
@@ -31,7 +31,7 @@ class ObjectSerializer implements ResponseDeserializer
             throw new SerializeException(sprintf('Error (%d) when trying to json_decode response', json_last_error()));
         }
 
-        if (is_subclass_of($class, CreatableFromArray::class)) {
+        if (is_subclass_of($class, ApiResponse::class)) {
             $object = call_user_func($class.'::createFromArray', $data);
         } else {
             $object = new $class($data);
diff --git a/tests/Api/StatsTest.php b/tests/Api/StatsTest.php
index b17eecc..f8b38b5 100644
--- a/tests/Api/StatsTest.php
+++ b/tests/Api/StatsTest.php
@@ -22,7 +22,7 @@ class StatsTest extends TestCase
 
         $api = $this->getApiMock();
         $api->expects($this->once())
-            ->method('get')
+            ->method('httpGet')
             ->with('/v3/domain/stats/total', $data)
             ->willReturn(new Response());
 
@@ -47,7 +47,7 @@ class StatsTest extends TestCase
 
         $api = $this->getApiMock();
         $api->expects($this->once())
-            ->method('get')
+            ->method('httpGet')
             ->with('/v3/domain/stats', $data)
             ->willReturn(new Response());
 
diff --git a/tests/Api/TestCase.php b/tests/Api/TestCase.php
index 33eaea1..ec07291 100644
--- a/tests/Api/TestCase.php
+++ b/tests/Api/TestCase.php
@@ -58,10 +58,10 @@ abstract class TestCase extends \PHPUnit_Framework_TestCase
         return $this->getMockBuilder($this->getApiClass())
             ->setMethods(
                 [
-                    'get',
-                    'post', 'postRaw', 'postMultipart',
-                    'delete', 'deleteMultipart',
-                    'put', 'putMultipart',
+                    'httpGet',
+                    'httpPost', 'httpPostRaw', 'postMultipart',
+                    'httpDelete', 'deleteMultipart',
+                    'httPut', 'putMultipart',
                 ]
             )
             ->setConstructorArgs([$httpClient, $requestClient, $serializer])
diff --git a/tests/Integration/DomainApiTest.php b/tests/Integration/DomainApiTest.php
index 239e7f6..aa0a5a8 100644
--- a/tests/Integration/DomainApiTest.php
+++ b/tests/Integration/DomainApiTest.php
@@ -9,13 +9,17 @@
 
 namespace Mailgun\Tests\Integration;
 
+use Mailgun\Api\Domain;
+use Mailgun\Resource\Api\Domain\CreateCredentialResponse;
+use Mailgun\Resource\Api\Domain\CreateResponse;
+use Mailgun\Resource\Api\Domain\DeleteCredentialResponse;
+use Mailgun\Resource\Api\Domain\DeleteResponse;
+use Mailgun\Resource\Api\Domain\UpdateCredentialResponse;
 use Mailgun\Tests\Api\TestCase;
-use Mailgun\Resource\Api\SimpleResponse;
-use Mailgun\Resource\Api\Domain\Credential;
-use Mailgun\Resource\Api\Domain\CredentialListResponse;
-use Mailgun\Resource\Api\Domain\DeliverySettingsResponse;
-use Mailgun\Resource\Api\Domain\DeliverySettingsUpdateResponse;
-use Mailgun\Resource\Api\Domain\SimpleDomain;
+use Mailgun\Resource\Api\Domain\CredentialResponseItem;
+use Mailgun\Resource\Api\Domain\CredentialResponse;
+use Mailgun\Resource\Api\Domain\ConnectionResponse;
+use Mailgun\Resource\Api\Domain\UpdateConnectionResponse;
 
 /**
  * @author Sean Johnson <sean@mailgun.com>
@@ -31,11 +35,11 @@ class DomainApiTest extends TestCase
      * Performs `GET /v3/domains` and ensures $this->testDomain exists
      * in the returned list.
      */
-    public function testDomainsList()
+    public function testIndex()
     {
         $mg = $this->getMailgunClient();
 
-        $domainList = $mg->getDomainApi()->listAll();
+        $domainList = $mg->getDomainApi()->index();
         $found = false;
         foreach ($domainList->getDomains() as $domain) {
             if ($domain->getName() === $this->testDomain) {
@@ -43,7 +47,7 @@ class DomainApiTest extends TestCase
             }
         }
 
-        $this->assertContainsOnlyInstancesOf(SimpleDomain::class, $domainList->getDomains());
+        $this->assertContainsOnlyInstancesOf(Domain::class, $domainList->getDomains());
         $this->assertTrue($found);
     }
 
@@ -55,7 +59,7 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $domain = $mg->getDomainApi()->info($this->testDomain);
+        $domain = $mg->getDomainApi()->show($this->testDomain);
         $this->assertNotNull($domain);
         $this->assertNotNull($domain->getDomain());
         $this->assertNotNull($domain->getInboundDNSRecords());
@@ -70,9 +74,9 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->remove('example.notareal.tld');
+        $ret = $mg->getDomainApi()->delete('example.notareal.tld');
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(DeleteResponse::class, $ret);
         $this->assertEquals('Domain not found', $ret->getMessage());
     }
 
@@ -111,7 +115,7 @@ class DomainApiTest extends TestCase
             false                       // wildcard domain?
         );
         $this->assertNotNull($domain);
-        $this->assertInstanceOf(SimpleResponse::class, $domain);
+        $this->assertInstanceOf(CreateResponse::class, $domain);
         $this->assertEquals('This domain name is already taken', $domain->getMessage());
     }
 
@@ -122,9 +126,9 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->remove('example.notareal.tld');
+        $ret = $mg->getDomainApi()->delete('example.notareal.tld');
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(DeleteResponse::class, $ret);
         $this->assertEquals('Domain has been deleted', $ret->getMessage());
     }
 
@@ -136,13 +140,13 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->newCredential(
+        $ret = $mg->getDomainApi()->createCredential(
             $this->testDomain,
             'user-test@'.$this->testDomain,
             'Password.01!'
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(CreateResponse::class, $ret);
         $this->assertEquals('Created 1 credentials pair(s)', $ret->getMessage());
     }
 
@@ -156,13 +160,13 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->newCredential(
+        $ret = $mg->getDomainApi()->createCredential(
             $this->testDomain,
             'user-test',
             'ExtremelyLongPasswordThatCertainlyWillNotBeAccepted'
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(CreateCredentialResponse::class, $ret);
     }
 
     /**
@@ -175,13 +179,13 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->newCredential(
+        $ret = $mg->getDomainApi()->createCredential(
             $this->testDomain,
             'user-test',
             'no'
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(CreateCredentialResponse::class, $ret);
     }
 
     /**
@@ -193,10 +197,10 @@ class DomainApiTest extends TestCase
 
         $found = false;
 
-        $ret = $mg->getDomainApi()->listCredentials($this->testDomain);
+        $ret = $mg->getDomainApi()->credentials($this->testDomain);
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(CredentialListResponse::class, $ret);
-        $this->assertContainsOnlyInstancesOf(Credential::class, $ret->getCredentials());
+        $this->assertInstanceOf(CredentialResponse::class, $ret);
+        $this->assertContainsOnlyInstancesOf(CredentialResponseItem::class, $ret->getCredentials());
 
         foreach ($ret->getCredentials() as $cred) {
             if ($cred->getLogin() === 'user-test@'.$this->testDomain) {
@@ -214,9 +218,9 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->listCredentials('mailgun.org');
+        $ret = $mg->getDomainApi()->credentials('mailgun.org');
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(CredentialResponse::class, $ret);
         $this->assertEquals('Domain not found: mailgun.org', $ret->getMessage());
     }
 
@@ -236,7 +240,7 @@ class DomainApiTest extends TestCase
             'Password..02!'
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(UpdateCredentialResponse::class, $ret);
         $this->assertEquals('Password changed', $ret->getMessage());
     }
 
@@ -293,7 +297,7 @@ class DomainApiTest extends TestCase
             $login
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(DeleteCredentialResponse::class, $ret);
         $this->assertEquals('Credentials have been deleted', $ret->getMessage());
         $this->assertEquals($login, $ret->getSpec());
     }
@@ -313,7 +317,7 @@ class DomainApiTest extends TestCase
             $login
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(SimpleResponse::class, $ret);
+        $this->assertInstanceOf(DeleteCredentialResponse::class, $ret);
         $this->assertEquals('Credentials not found', $ret->getMessage());
     }
 
@@ -324,9 +328,9 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->getDeliverySettings($this->testDomain);
+        $ret = $mg->getDomainApi()->connection($this->testDomain);
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(DeliverySettingsResponse::class, $ret);
+        $this->assertInstanceOf(ConnectionResponse::class, $ret);
         $this->assertTrue(is_bool($ret->getSkipVerification()));
         $this->assertTrue(is_bool($ret->getRequireTLS()));
     }
@@ -338,13 +342,13 @@ class DomainApiTest extends TestCase
     {
         $mg = $this->getMailgunClient();
 
-        $ret = $mg->getDomainApi()->updateDeliverySettings(
+        $ret = $mg->getDomainApi()->updateConnection(
             $this->testDomain,
             true,
             false
         );
         $this->assertNotNull($ret);
-        $this->assertInstanceOf(DeliverySettingsUpdateResponse::class, $ret);
+        $this->assertInstanceOf(UpdateConnectionResponse::class, $ret);
         $this->assertEquals('Domain connection settings have been updated, may take 10 minutes to fully propagate', $ret->getMessage());
         $this->assertEquals(true, $ret->getRequireTLS());
         $this->assertEquals(false, $ret->getSkipVerification());