Pix - Checkout API - Mercado Pago Developers
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Pix

Important
To offer payments with Pix, you must ensure that the Pix keys have been created. If you haven't created it yet, click here and check the necessary steps.
  1. Within your Salesforce Commerce Cloud store, go to the Merchant Tools menu and click the Payment Methods option found within the Ordering group of options. You can also find the option using the menu search engine.
  2. To activate the Pix payment method, position yourself on the PIX option. Then, in the column "Enabled" and select the option Yes to enable it.