Square Sync lists squareup products from the Connect Squareup API
Square Sync allows you to list you Squareup products on your wordpress page/post(s) via shortcode. The products are listed from the Connect Squareup API and link to the Square Market. As of this version, the Square Market’s payment processing is only available to US customers.
Login to you squareup account at connect.squareup.com and click on ‘APPS’. Click on the ‘New App’ button on the right of screen and enter an app name. You will know have a personal token.