I'm trying to create some custom REST API endpoints which get products with some special conditions, for example, one endpoint for featured products. I tried to use the wc_get_products function like this:

add_action('rest_api_init', 'my_custom_featured_product_endpoint');

function my_custom_featured_product_endpoint() {
    register_rest_route('custom-endpoints/v1', '/products/featured', array(
        'methods' => 'GET',
        'callback' => 'my_custom_featured_product_callback',

function my_custom_featured_product_callback() {
    $meta_query  = WC()->query->get_meta_query();
    $tax_query   = WC()->query->get_tax_query();
    $tax_query[] = array(
        'taxonomy' => 'product_visibility',
        'field'    => 'name',
        'terms'    => 'featured',
        'operator' => 'IN',

    $args = array(
        'tax_query' => $tax_query,
        'meta_query' => $meta_query,

    $result = wc_get_products($args);

    return rest_ensure_response($result);

The result is just some empty arrays. I can get those products with old fashion get_posts to replace wc_get_products but the output format doesn't have some properties like 'price', 'images' ...

So are there any alternatives for wc_get_products to use for custom REST API endpoints or are there any ways to make it work?

P/S: I tested the query by change the callback function like so:

function my_custom_featured_product_callback() {
    $result = wc_get_product(99);//Yes there is a product with ID 99

    return rest_ensure_response($result);

The result stays the same, just an empty array. So I think the issue must lie with the wc_get_products and wc_get_product functions. Maybe the rest_api_init is not the proper hook for those functions?

  • If you're getting an empty array and not an error, then the function is working fine. You're just not getting any posts that match your criteria. What are $meta_query and $tax_query ending up as anyway? Commented Dec 14, 2017 at 10:27
  • Actually the function is working fine in template files and return correct result with properly format. But when I use it with rest_api_init hook, the result is just some empty arrays.
    – David Lee
    Commented Dec 14, 2017 at 10:43
  • I think your problem is your use of WC()->query. In the REST API WooCommerce won't have run a query. Commented Dec 14, 2017 at 10:45
  • As I edited the question, I changed the callback function to test if the problem is the use of query. Please check my question again.
    – David Lee
    Commented Dec 14, 2017 at 11:01
  • Hang on, I'm not sure what you're doing with rest_ensure_response(). You should just be returning the $result. If you need the posts to match the normal format of returned posts, they need to be prepared. Commented Dec 14, 2017 at 12:57

3 Answers 3


you missed something, when you get a product using wc_get_product it returns to you an abstract object, so if you need to get product do this

$product =  wc_get_product($product_id);
return $product->get_data();

also you can use all the other functionalities too, such as:

  • 1
    THANK YOU! I had been trying to get product data for a long time. Was just missing $product->get_data(). Commented Jun 10, 2021 at 12:03

I faced a similar behavior where $wc_get_product always returned empty objects from a custom REST endpoint when I was checking the response with a console.log on the front end side.

It was because I was returning the PHP Object directly in the response, I solved the issue by converting the Product Object to an array with the help of the thread bellow :


After that it worked as expected, hopefully it'll be the same for you!


Add (array) cast before wc_get_products($args) like this:

$result = (array) wc_get_products($args);

If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccessible; private variables have the class name prepended to the variable name; protected variables have a '*' prepended to the variable name. These prepended values have null bytes on either side. and you can access to product data by *data property.

  • wc_get_products is array itself ! (array of objects).
    – T.Todua
    Commented Apr 16, 2020 at 18:02

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