The Mautic payment provider gateway is a mechanism that allows you to integrate your stores with payment service providers. As a result, you can create and handle transactions based on order details. Out-of-the-box Mautic implements the integrations such as PayPal, Braintree, and Authorize. Net payment service providers. These integrations allow you to create and handle transactions based on order details. You can create integration with other payment providers, using Mautic payment provider gateway.