To receive payments with Mercado Pago, you must first have the credentials. You can check your credentials in the Developer dashboard. If you want to know more about Mercado Pago credentials, go to this documentation.

Follow these steps to set up credentials.

1. Within your Salesforce Commerce Cloud store, go to the Merchant Tools menu and click the Custom preferences option found within the Global Preferences group of options. You can also find the option using the menu search engine.
2. In the ID column, click the MercadopagoCredentials option.
3. Fill in the Public Key and Access Token values with your credentials.