diff --git a/public/api/signup/mastodon/get_client.php b/public/api/signup/mastodon/get_client.php
index bb2c2d4..73242e5 100644
--- a/public/api/signup/mastodon/get_client.php
+++ b/public/api/signup/mastodon/get_client.php
@@ -8,8 +8,8 @@ if ($instance === false) {
 }
 
 $app_name      = conf('app_name', 'RealFan');
-$site_name     = conf('site_name', 'http://127.0.0.1:8080');
-$redirect_uris = conf('site_name', 'http://127.0.0.1:8080');
+$site_name     = conf('site_name', HOST_DEV);
+$redirect_uris = conf('site_name', HOST_DEV).'/signup/mastodon:oauth';
 $scopes        = 'read write';
 
 # create the Authorization App
@@ -33,11 +33,10 @@ if ($result === null) {
 		'Instance failed to create an authorization App. Is it an instance?'));
 }
 
-# create the URL for OAUTH
-$query_string = http_build_query([
-	'client_id'		=> $result->client_id ?? null,
-	'redirect_uris'	=> $redirect_uris,
+# return authentication data
+hres_json(200, OK, [
+	'instance'		=> $instance,
+	'result'		=> $result,
 	'response_type'	=> 'code',
 	'scope'			=> $scopes
 ]);
-hres_json(200, OK, $instance.'/oauth/authorize?'.$query_string);
diff --git a/src/base.php b/src/base.php
index c8ccc32..1f8de65 100644
--- a/src/base.php
+++ b/src/base.php
@@ -1,7 +1,8 @@
 <?php
 
-define('OK',	'ok');
-define('ERR',	'err');
+define('OK',		'ok');
+define('ERR',		'err');
+define('HOST_DEV',	'http://127.0.0.1:8080');
 
 $env = 'prod';
 if (getenv('ENV') !== false && in_array(getenv('ENV'), ['prod', 'dev']))