How to check if a plugin supports HPOS and Checkout Blocks

By Raz Technologies · published 23 Sept 2026 · data updated 23 Sept 2026

Short answer: look for the plugin's compatibility declaration — WooCommerce shows it under Settings → Advanced → Features, developers declare it with FeaturesUtil::declare_compatibility(), and our grid shows it for every plugin we track. See our request a quote plugin ranking for the full comparison.

Why it matters

High-Performance Order Storage (HPOS) moves orders out of the posts table, and the block-based Cart & Checkout replace the classic shortcodes. Plugins that hook into orders or checkout must support both, or they can break silently.

1. In WooCommerce

Go to WooCommerce → Settings → Advanced → Features. WooCommerce lists active plugins that are incompatible with HPOS there.

2. In the plugin's code

Compatible plugins declare it on before_woocommerce_init. If you find these lines with true, the plugin declares support:

add_action( 'before_woocommerce_init', function () {
    if ( class_exists( \Automattic\WooCommerce\Utilities\FeaturesUtil::class ) ) {
        \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'custom_order_tables', __FILE__, true );
        \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'cart_checkout_blocks', __FILE__, true );
    }
} );

The plugin header line WC tested up to: tells you the newest WooCommerce version the developer tested.

3. In our compatibility grid

We read these declarations from every new version of the 87 plugin listings we track and publish them with dates in the WooCommerce compatibility grid.

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