diff --git a/examples/Account.php b/examples/Account.php
index d5d0ae3..8f729be 100644
--- a/examples/Account.php
+++ b/examples/Account.php
@@ -5,7 +5,7 @@
 use Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get user.
 $user = $client->getUser('AUTHORIZATION_TOKEN');
diff --git a/examples/Card.php b/examples/Card.php
index 51c91a2..b9ebce2 100644
--- a/examples/Card.php
+++ b/examples/Card.php
@@ -5,7 +5,7 @@
 use Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get user.
 $user = $client->getUser('AUTHORIZATION_TOKEN');
diff --git a/examples/Reserve.php b/examples/Reserve.php
index 992c509..f34d716 100644
--- a/examples/Reserve.php
+++ b/examples/Reserve.php
@@ -5,7 +5,7 @@
 use \Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get the reserve summary of all the obligations and assets within it (public endpoint).
 $statistics = $client->getReserve()->getStatistics();
diff --git a/examples/Ticker.php b/examples/Ticker.php
index 959f4ab..ec4a3fa 100644
--- a/examples/Ticker.php
+++ b/examples/Ticker.php
@@ -5,7 +5,7 @@
 use Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get rates (public endpoint).
 $rates = $client->getRates();
diff --git a/examples/Transaction.php b/examples/Transaction.php
index 3aecdfa..e182176 100644
--- a/examples/Transaction.php
+++ b/examples/Transaction.php
@@ -5,7 +5,7 @@
 use Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get user.
 $user = $client->getUser('AUTHORIZATION_TOKEN');
diff --git a/examples/User.php b/examples/User.php
index 79426fa..69b1c40 100644
--- a/examples/User.php
+++ b/examples/User.php
@@ -5,7 +5,7 @@
 use Uphold\UpholdClient as Client;
 
 // Initialize the client.
-$client = new Client();
+$client = new Client(array('sandbox' => true));
 
 // Get user.
 $user = $client->getUser('AUTHORIZATION_TOKEN');
diff --git a/lib/Uphold/Command/CreateTokenCommand.php b/lib/Uphold/Command/CreateTokenCommand.php
index 70ddf72..4194ad7 100644
--- a/lib/Uphold/Command/CreateTokenCommand.php
+++ b/lib/Uphold/Command/CreateTokenCommand.php
@@ -2,15 +2,16 @@
 
 namespace Uphold\Command;
 
-use Uphold\UpholdClient;
-use Uphold\Exception\AuthenticationRequiredException;
-use Uphold\Exception\BadRequestException;
-use Uphold\Exception\TwoFactorAuthenticationRequiredException;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Process\Process;
+use Uphold\Exception\AuthenticationRequiredException;
+use Uphold\Exception\BadRequestException;
+use Uphold\Exception\TwoFactorAuthenticationRequiredException;
+use Uphold\UpholdClient;
 
 /**
  * Command to create a new Personal Access Token
@@ -22,8 +23,16 @@ class CreateTokenCommand extends Command
      */
     protected function configure()
     {
-        $this->setName('tokens:create')
-            ->setDescription('Create a new Personal Access Token');
+        $this
+            ->setName('tokens:create')
+            ->setDescription('Create a new Personal Access Token')
+            ->addOption(
+               'sandbox',
+               null,
+               InputOption::VALUE_NONE,
+               'If set, the request will be made to Uphold\'s sandbox API'
+            )
+        ;
     }
 
     /**
@@ -40,7 +49,7 @@ protected function initialize(InputInterface $input, OutputInterface $output)
         $this->output = $output;
 
         // Uphold client.
-        $this->client = new UpholdClient();
+        $this->client = new UpholdClient(array('sandbox' => $input->getOption('sandbox')));
 
         // Input variables.
         $this->description = null;
diff --git a/lib/Uphold/UpholdClient.php b/lib/Uphold/UpholdClient.php
index 18f6a06..fbbf9c9 100644
--- a/lib/Uphold/UpholdClient.php
+++ b/lib/Uphold/UpholdClient.php
@@ -17,6 +17,12 @@
 */
 class UpholdClient
 {
+    /**
+     * Uphold API urls.
+     */
+    const UPHOLD_API_URL = 'https://api.uphold.com';
+    const UPHOLD_SANDBOX_API_URL = 'https://api-sandbox.uphold.com';
+
     /**
      * Guzzle instance used to communicate with Uphold.
      *
@@ -36,8 +42,8 @@ class UpholdClient
      */
     private $options = array(
         'api_version' => 'v0',
-        'base_url' => 'https://api.uphold.com/',
         'debug' => false,
+        'sandbox' => false,
         'timeout' => 10,
         'user_agent' => 'uphold-sdk-php {version} (https://github.com/seegno/uphold-sdk-php)',
         'version' => '4.2.0',
@@ -50,6 +56,10 @@ class UpholdClient
      */
     public function __construct(array $options = array())
     {
+        if (!isset($options['base_url'])) {
+            $options['base_url'] = isset($options['sandbox']) && $options['sandbox'] ? self::UPHOLD_SANDBOX_API_URL : self::UPHOLD_API_URL;
+        }
+
         $this->options = array_merge($this->options, $options);
 
         $this->setHttpClient(new HttpClient($this->options));
diff --git a/test/Uphold/Tests/Functional/ReserveTest.php b/test/Uphold/Tests/Functional/ReserveTest.php
index 40572e2..b481325 100644
--- a/test/Uphold/Tests/Functional/ReserveTest.php
+++ b/test/Uphold/Tests/Functional/ReserveTest.php
@@ -28,7 +28,7 @@ public function shouldReturnTransactions()
      */
     public function shouldReturnOneTransactions()
     {
-        $exampleTransactionId = '66fc2a0d-a933-45f0-ba27-8cf12870fcce';
+        $exampleTransactionId = 'af3ef9a7-9262-4022-b376-7b4d928f7206';
 
         $transaction = $this->client->getReserve()->getTransactionById($exampleTransactionId);
 
diff --git a/test/Uphold/Tests/Functional/TestCase.php b/test/Uphold/Tests/Functional/TestCase.php
index 7db2dd4..b897a45 100644
--- a/test/Uphold/Tests/Functional/TestCase.php
+++ b/test/Uphold/Tests/Functional/TestCase.php
@@ -18,7 +18,7 @@ class TestCase extends \PHPUnit_Framework_TestCase
      */
     public function setUp()
     {
-        $client = new UpholdClient();
+        $client = new UpholdClient(array('sandbox' => true));
 
         $this->client = $client;
     }