diff --git a/README.md b/README.md
index a6c70dc..e99d3be 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,7 @@ $server = new League\OAuth1\Client\Server\Twitter([
     'identifier' => 'your-identifier',
     'secret' => 'your-secret',
     'callback_uri' => "http://your-callback-uri/",
+    'scope' => 'your-application-scope' // optional ('read', 'write'), defaults to 'read'
 ]);
 ```
 
diff --git a/src/Server/Server.php b/src/Server/Server.php
index 9341beb..5048043 100644
--- a/src/Server/Server.php
+++ b/src/Server/Server.php
@@ -552,6 +552,17 @@ protected function additionalProtocolParameters()
         return [];
     }
 
+    /**
+     * Any additional required protocol parameters for an
+     * OAuth request to get temporary credentials.
+     *
+     * @return array
+     */
+    protected function additionalTemporaryCredentialsProtocolParameters()
+    {
+        return [];
+    }
+
     /**
      * Generate the OAuth protocol header for a temporary credentials
      * request, based on the URI.
@@ -562,9 +573,13 @@ protected function additionalProtocolParameters()
      */
     protected function temporaryCredentialsProtocolHeader($uri)
     {
-        $parameters = array_merge($this->baseProtocolParameters(), [
-            'oauth_callback' => $this->clientCredentials->getCallbackUri(),
-        ]);
+        $parameters = array_merge(
+            $this->baseProtocolParameters(),
+            $this->additionalTemporaryCredentialsProtocolParameters(),
+            [
+                'oauth_callback' => $this->clientCredentials->getCallbackUri(),
+            ]
+        );
 
         $parameters['oauth_signature'] = $this->signature->sign($uri, $parameters, 'POST');
 
diff --git a/src/Server/Twitter.php b/src/Server/Twitter.php
index b67b606..ce95fdf 100644
--- a/src/Server/Twitter.php
+++ b/src/Server/Twitter.php
@@ -3,9 +3,53 @@
 namespace League\OAuth1\Client\Server;
 
 use League\OAuth1\Client\Credentials\TokenCredentials;
+use League\OAuth1\Client\Signature\SignatureInterface;
 
 class Twitter extends Server
 {
+    /**
+     * Application scope.
+     *
+     * @var string
+     */
+    protected $applicationScope;
+
+    /**
+     * @inheritDoc
+     */
+    public function __construct($clientCredentials, SignatureInterface $signature = null)
+    {
+        parent::__construct($clientCredentials, $signature);
+
+        if (is_array($clientCredentials)) {
+            $this->parseConfiguration($clientCredentials);
+        }
+    }
+
+    /**
+     * Set the application scope.
+     *
+     * @param string $applicationScope
+     *
+     * @return Twitter
+     */
+    public function setApplicationScope($applicationScope)
+    {
+        $this->applicationScope = $applicationScope;
+
+        return $this;
+    }
+
+    /**
+     * Get application scope.
+     *
+     * @return string
+     */
+    public function getApplicationScope()
+    {
+        return $this->applicationScope ?: 'read';
+    }
+
     /**
      * @inheritDoc
      */
@@ -97,4 +141,34 @@ public function userScreenName($data, TokenCredentials $tokenCredentials)
     {
         return $data['name'];
     }
+
+    /**
+     * @inheritDoc
+     */
+    protected function additionalTemporaryCredentialsProtocolParameters()
+    {
+        return [
+            'x_auth_access_type' => $this->getApplicationScope()
+        ];
+    }
+
+    /**
+     * Parse configuration array to set attributes.
+     *
+     * @param array $configuration
+     *
+     * @return void
+     */
+    private function parseConfiguration(array $configuration = [])
+    {
+        $configToPropertyMap = [
+            'scope' => 'applicationScope',
+        ];
+
+        foreach ($configToPropertyMap as $config => $property) {
+            if (isset($configuration[$config])) {
+                $this->$property = $configuration[$config];
+            }
+        }
+    }
 }