3DL Central Checkout for WooCommerce

3DL Central Checkout for WooCommerce is a free, simple bridge between WooCommerce stores in one WordPress Multisite network.

Choose one site as the Main store. It owns the real WooCommerce cart, checkout and final order. Other sites become Source stores. When a customer adds a product on a Source store, FREE securely transfers that product, selected variation and requested quantity to the Main store.

The customer can then continue browsing the Source store or open the central cart immediately. Products from the Main store and multiple Source stores can be combined in one cart and completed through one checkout on the Main store.

The free plugin is intentionally focused on this core use case. It is a working central-cart solution and a simple way to test the architecture before choosing the full PRO edition.

How it works

1. A customer adds a simple or variable product on a Source store.
2. FREE sends a signed product transfer to the Main store.
3. The product becomes a remote line item in the Main-store WooCommerce cart.
4. The Main store owns the real cart, checkout and final WooCommerce order.

Before checkout, FREE asks the Source store to check the product again for availability, purchasability, price, currency, units and requested stock quantity.

Source-store cart badges may show a read-only count from the Main-store cart when that count is available. Cart and checkout links on Source stores lead to the Main store. FREE does not create a second editable cart on every Source store.

The transfer is signed with HMAC-SHA256. The free plugin does not contact 3DragonLabs or any other third-party service during normal operation. Communication happens only between the WordPress sites configured by the administrator.

What FREE includes

• One central WooCommerce cart, checkout and final order on the Main store.
• One-way transfer of simple products, variable products, selected variations and quantities from Source stores.
• Products from the Main store and multiple Source stores in one central cart.
• A second availability, price, currency, unit and stock check before checkout.
• A configurable return to the Source store after adding a product, or immediate opening of the central cart.
• Read-only Source-store cart indication when the Main-cart count is available.
• HMAC-SHA256 signed transfers and a trusted Source-store URL allow-list.
• Source URL and original product ID kept with remote order items on the Main store.

Important limitation of FREE

FREE is not a live cross-store inventory and order synchronization system.

• The real WooCommerce cart exists only on the Main store.
• A Source-store badge is only informational; it is not a second local cart.
• Source stock is checked before checkout, but FREE does not reserve or deduct that stock after the order.
• FREE does not create an order record on the Source store.
• FREE does not synchronize refunds, restocking or order statuses back to Source stores.
• FREE does not provide live Source-store cart editing, event logs, CSV exports, repair tools or advanced diagnostics.

Because Source stock is not reserved or deducted, FREE is best for testing, unlimited-stock products, stores that do not use Source-side stock management, or setups where inventory and order synchronization is handled elsewhere.

FREE and PRO

FREE provides the central-cart foundation: a one-way product transfer into one Main-store cart and one Main-store checkout.

3DL Central Checkout PRO is the production synchronization edition. PRO adds a live editable cart across stores, Source-stock deduction and restocking, Source-side order records, refund and order-status synchronization, event logs, diagnostics and maintenance tools.

If the Source stores must remain operationally synchronized after an order, use 3DL Central Checkout PRO from 3DragonLabs.

Requirements

• WordPress Multisite.
• WooCommerce active on the Main store and every participating Source store.
• The same plugin version installed on all participating stores is recommended.
• The participating stores must use the same currency and the same weight and dimension units.
• HTTPS is strongly recommended for every participating store.

Using FREE

Customers use the Source stores normally. They select a product or variation and click Add to cart. FREE transfers the item to the Main store and then follows the post-add setting chosen by the administrator.

The default is to return the customer to the Source store. The Source-store cart and checkout links, including the Mini-Cart Block link, lead to the Main-store cart and checkout. The final order is created only on the Main store.

Remote order items retain the Source-store URL and original product ID, so their origin remains visible in the Main-store order. FREE does not publish the internal carrier product as a public product.