Introducing the new API just for Square Online. Now you can create custom add-ons that sellers can add to their online sites.
Thousands of merchants sign up for Square Online every day to start selling in more ways. Now you can help them.
Sellers can improve their online stores by installing your app as an add-on with just a few clicks.
As a Square App Partner, you can market and monetise your app to sellers in the App Marketplace. When your app is ready, apply to become a partner.
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