diff --git a/src/Oauth2/Resource/Server.php b/src/Oauth2/Resource/Server.php
index 15d62fa1..bd6a8984 100644
--- a/src/Oauth2/Resource/Server.php
+++ b/src/Oauth2/Resource/Server.php
@@ -2,7 +2,213 @@
 
 namespace Oauth2\Resource;
 
+class OAuthResourceServerException extends \Exception
+{
+
+}
+
 class Server
 {
+    /**
+     * The access token.
+     * @access private
+     */
+    private $_accessToken = NULL;
+
+    /**
+     * The scopes the access token has access to.
+     * @access private
+     */
+    private $_scopes = array();
+
+    /**
+     * The type of owner of the access token.
+     * @access private
+     */
+    private $_type = NULL;
+
+    /**
+     * The ID of the owner of the access token.
+     * @access private
+     */
+    private $_typeId = NULL;
+
+    /**
+     * Server configuration
+     * @var array
+     */
+    private $config = array(
+        'token_key' =>  'oauth_token'
+    );
+
+    /**
+     * Constructor
+     * 
+     * @access public
+     * @return void
+     */
+    public function __construct($options = null)
+    {
+        if ($options !== null) {
+            $this->config = array_merge($this->config, $options);
+        }
+    }
+
+    /**
+     * Magic method to test if access token represents a particular owner type
+     * @param  [type] $method     [description]
+     * @param  [type] $arguements [description]
+     * @return [type]             [description]
+     */
+    public function __call($method, $arguements)
+    {
+        if (substr($method, 0, 2) === 'is')
+        {
+            if ($this->_type === strtolower(substr($method, 2)))
+            {
+                return $this->_typeId;
+            }
+            
+            return false;
+        }
+    }
+
+    /**
+     * Register a database abstrator class
+     * 
+     * @access public
+     * @param  object $db A class that implements OAuth2ServerDatabase
+     * @return void
+     */
+    public function registerDbAbstractor($db)
+    {
+        $this->db = $db;
+    }
     
+    /**
+     * Init function
+     * 
+     * @access public
+     * @return void
+     */
+    public function init()
+    {
+        $accessToken = null;
+
+        // Try and get the access token via an access_token or oauth_token parameter
+        switch ($server['REQUEST_METHOD'])
+        {           
+            case 'POST':
+                $accessToken = isset($_POST[$this->config['token_key']]) ? $_POST[$this->config['token_key']] : null;
+                break;
+
+            default:
+            $accessToken = isset($_GET[$this->config['token_key']]) ? $_GET[$this->config['token_key']] : null;
+                break;
+        }
+
+        // Try and get an access token from the auth header
+        $headers = getallheaders();
+        if (isset($headers['Authorization']))
+        {
+            $rawToken = trim(str_replace('Bearer', '', $headers['Authorization']));
+            if ( ! empty($rawToken))
+            {
+                $accessToken = base64_decode($rawToken);
+            }
+        }
+        
+        if ($accessToken)
+        {
+            $sessionQuery = $this->ci->db->get_where('oauth_sessions', array('access_token' => $accessToken, 'stage' => 'granted'));
+            
+            if ($session_query->num_rows() === 1)
+            {
+                $session = $session_query->row();
+                $this->_accessToken = $session->access_token;
+                $this->_type = $session->type;
+                $this->_typeId = $session->type_id;
+                
+                $scopes_query = $this->ci->db->get_where('oauth_session_scopes', array('access_token' => $accessToken));
+                if ($scopes_query->num_rows() > 0)
+                {
+                    foreach ($scopes_query->result() as $scope)
+                    {
+                        $this->_scopes[] = $scope->scope;
+                    }
+                }
+            }
+            
+            else
+            {
+                $this->ci->output->set_status_header(403);
+                $this->ci->output->set_output('Invalid access token');
+            }
+        }
+        
+        else
+        {
+            $this->ci->output->set_status_header(403);
+            $this->ci->output->set_output('Missing access token');
+        }
+    }
+    
+    /**
+     * Test if the access token has a specific scope
+     * 
+     * @param mixed $scopes Scope(s) to check
+     * 
+     * @access public
+     * @return string|bool
+     */
+    public function hasScope($scopes)
+    {
+        if (is_string($scopes))
+        {
+            if (in_array($scopes, $this->_scopes))
+            {
+                return true;
+            }
+            
+            return false;
+        }
+        
+        elseif (is_array($scopes))
+        {
+            foreach ($scopes as $scope)
+            {
+                if ( ! in_array($scope, $this->_scopes))
+                {
+                    return false;
+                }
+            }
+            
+            return true;
+        }
+        
+        return false;
+    }
+
+    /**
+     * Call database methods from the abstractor
+     * 
+     * @return mixed The query result
+     */
+    private function dbcall()
+    {
+        if ($this->db === null) {
+            throw new OAuthResourceServerException('No registered database abstractor');
+        }
+
+        if ( ! $this->db instanceof Database) {
+            throw new OAuthResourceServerException('Registered database abstractor is not an instance of Oauth2\Resource\Database');
+        }
+
+        $args = func_get_args();
+        $method = $args[0];
+        unset($args[0]);
+        $params = array_values($args);
+
+        return call_user_func_array(array($this->db, $method), $args);
+    }
 }
\ No newline at end of file