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/ Documentation /Integrations/ How to Setup Square Gateway for the Cartflows Upsell & Downsell?

How to Setup Square Gateway for the Cartflows Upsell & Downsell?

Starting with CartFlows Pro version 1.5.10, we’ve added custom support for the much-requested Square Payment Gateway. You can now use Square to offer both upsell and downsell offers in your CartFlows funnels.

Follow the steps below to configure Square Gateway with your CartFlows setup.

Prerequisites

Before you begin, please make sure you have the following ready:

  • A registered Square Payment Gateway account. If you don’t have one, you can create it here.
  • After logging in, navigate to My Applications to retrieve your Application ID, and go to the Account section to get your Access Token.
  • Download and install the Square Payment Gateway plugin for WooCommerce. If you need help installing plugins, refer to this guide.
  • Your website must have SSL enabled, and all URLs should be forced to use HTTPS.

Steps to Enable Square Gateway

Step 1: Enable Square in WooCommerce

  • From your WordPress dashboard, go to: WooCommerce → Settings → Payments tab
  • Locate Square – Credit Card and toggle it to Enable.
  • Click Save Changes at the bottom of the page.

Step 2: Configure Square Settings

After enabling, a Square tab will appear under the Payments section. Click on it to begin configuration.

Step 3: Add Credentials

  • If you’re testing, enable the Sandbox mode checkbox.
  • Enter the corresponding Application ID and Access Token (for either Sandbox or Live, depending on your setup).

Once configured, your CartFlows upsell and downsell offers will be ready to accept payments via Square, giving your customers a secure and seamless checkout experience.

For more details about Square’s WooCommerce settings, you can refer to this WooCommerce documentation.

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