diff --git a/xmlapi.php b/xmlapi.php
index 51b65dc..db3afd9 100644
--- a/xmlapi.php
+++ b/xmlapi.php
@@ -2446,6 +2446,12 @@ public function listaddondomains($username, $domain = null)
         return $this->api2_query($username, 'Park', 'listaddondomains');
     }
 
+    // This API function displays a list of all domains related to this account.
+    public function listalldomains($username)
+    {
+        return $this->api2_query($username, 'DomainInfo', 'list_domains');
+    }
+
     // This API function displays a list of all selected stats for a specific user.
     public function stat($username, $args = null)
     {
@@ -2467,4 +2473,50 @@ public function stat($username, $args = null)
         return $this->api2_query($username, 'StatsBar', 'stat', $values);
     }
 
+    // This API function add as addon a domain onto this user's account
+    public function addaddon($username, $newdomain, $subdomain, $ftpPass, $dir = null)
+    {
+        if ( (!isset($username)) && (!isset($newdomain)) ) {
+            error_log("addaddon requires that a username, new domain, subdomain and ftp password are passed to it");
+
+            return false;
+        }
+
+        if(empty($dir)) {
+            $dir = "public_html/" . $newdomain;
+        }
+
+        $args = array(
+            'newdomain' => $newdomain,
+            'dir' => $dir,
+            'subdomain' => $subdomain,
+            'pass' => $ftpPass
+        );
+
+        return $this->api2_query($username, "AddonDomain", "addaddondomain", $args);
+    }
+
+    // This API function remove an addon domain from this user's account
+    public function deladdon($username, $newdomain, $subdomain, $maindomain = null)
+    {
+        if ( (!isset($username)) && (!isset($newdomain)) ) {
+            error_log("deladdon requires that a username, new domain and subdomain are passed to it");
+
+            return false;
+        }
+
+        if(!$maindomain) {
+            $alldomains = $this->listalldomains($username);
+            $maindomain = $alldomains['main_domain'];
+        }
+
+        // follow the pattern for subdomain: subdomain_maindomain.com
+        $args = array(
+            'newdomain' => $newdomain,
+            'subdomain' => $subdomain . '_' . $maindomain
+        );
+
+        return $this->api2_query($username, "AddonDomain", "deladdondomain", $args);
+    }
+
 }