Is WooCommerce Legacy REST API compatible with HPOS and Checkout Blocks?
Plugin by Automattic · checked by Raz Technologies from v1.0.6 on · How we check
WooCommerce Legacy REST API 1.0.6 declares itself incompatible with HPOS (High-Performance Order Storage) in its code. WooCommerce Legacy REST API 1.0.6 does not declare Cart and Checkout Blocks compatibility. Its "WC tested up to" header says WooCommerce 9.5; the current WooCommerce release is 11.2.2.
| Check | Status | Evidence |
|---|---|---|
| HPOS (High-Performance Order Storage) | No— Declares HPOS incompatible (woocommerce-legacy-rest-api/includes/class-wc-legacy-rest-api-plugin.php). Evidence: declared. Verified 15 Oct 2026 (v1.0.6). | Compatibility declaration in woocommerce-legacy-rest-api/includes/class-wc-legacy-rest-api-plugin.php Declared |
| Cart & Checkout Blocks | Not declared— No Cart/Checkout Blocks declaration in v1.0.6. Evidence: declared. Verified 15 Oct 2026 (v1.0.6). | No declaration found in the plugin code Declared |
| WooCommerce 11.2.2 | No— WC tested up to 9.5; current WooCommerce 11.2.2. Evidence: declared. Verified 15 Oct 2026 (v1.0.6). | "WC tested up to: 9.5" in the plugin header Declared |
Read from the plugin's zip on WordPress.org (v1.0.6), 15 Oct 2026. Declared = what the plugin's own code states; not a lab test. Re-checked within hours of every new version.
What this means for your store
- WooCommerce will not let you switch order storage to HPOS while WooCommerce Legacy REST API is active, because the plugin declares itself incompatible. Keep the store on legacy (posts) storage, or replace the plugin before switching.
- If your store uses the block-based Cart and Checkout (the default for new WooCommerce stores), check that WooCommerce Legacy REST API's features appear there on a staging copy. The classic checkout (the [woocommerce_checkout] shortcode) is the fallback.
WooCommerce Legacy REST API at a glance
| Version | 1.0.6 |
|---|---|
| Last updated | 14 Oct 2026 |
| Active installs | 400,000+ |
| Rating | 1.5/5 (29 ratings) |
| WC tested up to | 9.5 |
| WC requires at least | 2.6 |
| Requires WordPress | 6.2 |
| Tested up to WordPress | Not declared |
| Requires PHP | 7.4 |
Source: WordPress.org, .
Versions we have checked
| Version | HPOS | Checkout Blocks | WC tested up to | Checked |
|---|---|---|---|---|
| 1.0.6 | declared incompatible | not declared | 9.5 | 15 Oct 2026 |
A new row is added each time a new version is released and scanned.
Similar WooCommerce plugins: HPOS and Checkout Blocks
| Plugin | Installs | HPOS | Checkout Blocks |
|---|---|---|---|
| Enable Abilities for MCP | 6,000+ | Yes | Not declared |
FAQ
Is WooCommerce Legacy REST API compatible with HPOS?
WooCommerce Legacy REST API 1.0.6 declares itself incompatible with HPOS (High-Performance Order Storage) in its code. Checked 15 October 2026 from the plugin's code on WordPress.org.
Does WooCommerce Legacy REST API work with the WooCommerce Checkout Blocks?
WooCommerce Legacy REST API 1.0.6 does not declare Cart and Checkout Blocks compatibility. Checked 15 October 2026.
Is WooCommerce Legacy REST API compatible with WooCommerce 11.2?
Its "WC tested up to" header says WooCommerce 9.5; the current WooCommerce release is 11.2.2. Checked 15 October 2026.