Get meta data of a custom post type

You’ll need to add_post_type_support( 'my-post-type', 'custom-fields' ) in order for the meta endpoint to be automatically registered for the post type.

Alternatively, you could register the routes for yourself with:

$meta_controller = new WP_REST_Meta_Posts_Controller( 'my-post-type' );
$meta_controller->register_routes();

Hi Daniel,

Thanks for you reply. I have one question though. Where to put this code

$meta_controller = new WP_REST_Meta_Posts_Controller( 'my-post-type' );
$meta_controller->register_routes();

I added the code in functions.php inside the following function

add_action( 'init', 'my_custom_post_type_rest_support', 25 );
function my_custom_post_type_rest_support() { }

but got following error

Fatal error: Call to a member function register_route() on null in /wp-includes/rest-api.php on line 69

You’ll want to register your endpoint on the rest_api_init hook

I did register in res_api_init hook and the routes is now available but we are getting 401 unauthorized error.

{
  "code": "rest_forbidden",
  "message": "Sorry, you cannot view the meta for this post.",
  "data": {
    "status": 401
  }
}

User should be logged in to access this route? If yes, then how to make it available for public. Thank you.

User should be logged in to access this route?

Yes.

If yes, then how to make it available for public.

Generally, meta shouldn’t be broadly exposed because there’s the risk you’ll expose private data. Instead, I’d recommend looking at this guide to see how you can go about extending responses.