Once you have installed the Square Payment Gateway from the Apps menu, go to the main dashboard and navigate to Accounting > Configuration > Payment Providers. In the list of available providers, locate Square and click on it to open its configuration form. Finally, click the “Activate” button to enable the Square Payment Gateway in your Odoo system.

Screenshot: Square listed in Odoo Payment Acquirers

After entering your Access Token, and Location ID, click on the "Test Credentials" button to verify your integration.

If everything is set up correctly, Odoo will display a Success message.

This ensures your API connection with Square is active before using the payment gateway in production.

Square Credentials Configuration in Odoo

When a customer chooses Square and clicks “Pay” button, they are redirected to a secure checkout page hosted by Square where they can enter their card details.

Once the customer clicks the Pay button, they will be redirected to Square's secure checkout page. There, they can enter their payment details. In the sandbox environment, the customer follows a three-step test flow. After clicking Test Payment, the transaction will be processed successfully. Square then sends a webhook notification to Odoo for payment confirmation, and the related invoice or sales order is automatically marked as paid.

You can also check the webhook delivery status and logs in your Square Developer Dashboard under Webhooks → Logs.

Once the payment is completed, Odoo automatically records the transaction and updates the invoice or sales order status to Paid.