Make endpoints provide minimum the Jetpack version.

projects/plugins/jetpack/class.json-api-endpoints.php

@@ -132,7 +132,14 @@ abstract class WPCOM_JSON_API_Endpoint {
 	 *
 	 * @var string
 	 */
-	public $rest_route = null;
+	public $rest_route;
+
+	/**
+	 * Jetpack Version in which REST support was introduced.
+	 *
+	 * @var string
+	 */
+	public $rest_min_jp_version;
 
 	/**
 	 * Accepted query parameters
@@ -316,6 +323,7 @@ public function __construct( $args ) {
 			'jp_disabled'                          => false,
 			'path_labels'                          => array(),
 			'rest_route'                           => null,
+			'rest_min_jp_version'                  => null,
 			'request_format'                       => array(),
 			'response_format'                      => array(),
 			'query_parameters'                     => array(),
@@ -350,12 +358,14 @@ public function __construct( $args ) {
 		$this->method      = $args['method'];
 		$this->path        = $args['path'];
 		$this->path_labels = $args['path_labels'];
-		$this->rest_route  = $args['rest_route'];
 		$this->min_version = $args['min_version'];
 		$this->max_version = $args['max_version'];
 		$this->deprecated  = $args['deprecated'];
 		$this->new_version = $args['new_version'];
 
+		$this->rest_route          = $args['rest_route'];
+		$this->rest_min_jp_version = $args['rest_min_jp_version'];
+
 		// Ensure max version is not less than min version.
 		if ( version_compare( $this->min_version, $this->max_version, '>' ) ) {
 			$this->max_version = $this->min_version;
@@ -2761,6 +2771,15 @@ public function build_rest_route() {
 		return $version_prefix . $this->rest_route;
 	}
 
+	/**
+	 * Get Jetpack Version where support for the endpoint was introduced.
+	 *
+	 * @return string
+	 */
+	public function get_rest_min_jp_version() {
+		return $this->rest_min_jp_version;
+	}
+
 	/**
 	 * Return endpoint response
 	 *

projects/plugins/jetpack/json-endpoints/jetpack/class.jetpack-json-api-plugins-list-endpoint.php

@@ -6,6 +6,7 @@
 		'method'                  => 'GET',
 		'path'                    => '/sites/%s/plugins',
 		'rest_route'              => '/plugins',
+		'rest_min_jp_version'     => '14.0-a.7',
 		'stat'                    => 'plugins',
 		'min_version'             => '1',
 		'max_version'             => '1.1',