To accept payments through MONEI in your Shopify store you simply need to install and configure MONEI Payment Gateway.
Install MONEI Payment Gateway in your Shopify store.
Configure MONEI Payment Gateway in your Shopify store payment settings.
Go to your Shopify Settings → Payments → Third-party providers
Search for "Pagar con Tarjeta by MONEI"
Enter your Account ID and Password. You can find your Account ID and Password in MONEI Dashboard → Settings and click "Activate".
If you want a payment method to have a different name (not "Pagar con Tarjeta by MONEI") or if you have any other questions please contact support.