diff --git a/includes/classes/Feature/Autosuggest/Autosuggest.php b/includes/classes/Feature/Autosuggest/Autosuggest.php
index ee9d87057..0b71a3929 100644
--- a/includes/classes/Feature/Autosuggest/Autosuggest.php
+++ b/includes/classes/Feature/Autosuggest/Autosuggest.php
@@ -906,7 +906,7 @@ protected function set_settings_schema() {
 
 			$this->settings_schema[] = [
 				'disabled' => $set_in_wp_config,
-				'help'     => $set_in_wp_config ? __( 'This address will be exposed to the public.', 'elasticpress' ) : '',
+				'help'     => ! $set_in_wp_config ? __( 'A valid URL starting with <code>http://</code> or <code>https://</code>. This address will be exposed to the public.', 'elasticpress' ) : '',
 				'key'      => 'endpoint_url',
 				'label'    => __( 'Endpoint URL', 'elasticpress' ),
 				'type'     => 'url',
diff --git a/includes/classes/REST/Features.php b/includes/classes/REST/Features.php
index 9be6739e3..8d179d7a9 100644
--- a/includes/classes/REST/Features.php
+++ b/includes/classes/REST/Features.php
@@ -71,6 +71,10 @@ public function get_args() {
 					case 'toggle':
 						$property['type'] = 'boolean';
 						break;
+					case 'url':
+						$property['type']   = 'string';
+						$property['format'] = 'uri';
+						break;
 				}
 
 				$properties[ $schema['key'] ] = $property;