Index: src/wp-includes/rest-api/class-wp-rest-server.php
===================================================================
--- src/wp-includes/rest-api/class-wp-rest-server.php	(revision 36998)
+++ src/wp-includes/rest-api/class-wp-rest-server.php	(working copy)
@@ -945,7 +945,7 @@
 		$available = array(
 			'name'           => get_option( 'blogname' ),
 			'description'    => get_option( 'blogdescription' ),
-			'url'            => get_option( 'siteurl' ),
+			'url'            => home_url(),
 			'namespaces'     => array_keys( $this->namespaces ),
 			'authentication' => array(),
 			'routes'         => $this->get_data_for_routes( $this->get_routes(), $request['context'] ),