Using our plugin for WooCommerce, there are two different ways to interact with Partial.ly.
Using the Partial.ly gateway, where Partial.ly is a payment option in the normal WooCommerce checkout. Using this method, the order creation is handled by your WooCommerce shop, and the user goes to Partial.ly just for payment. To do this you will need to enter your api settings in the plugin settings so that the plugin can communicate with Partial.ly
Using a Partial.ly checkout button on your product landing page, in the Partial.ly widget, or on your cart page. Using this method, Partial.ly creates the payment plan and the subsequent order in WooCommerce using the WooCommerce API. To do this, you will need to connect to WooCommerce from your Partial.ly merchant portal integration settings.