You can use Stripe to accept online payment with credit cards.
All you need to do is purchase the Stripe extension (for the web and for your APP) in our marketplace and do some fast configurations in your dashboard.
1. To configure your Stripe account, just go to your dashboard and click on the payment settings option.
1.1. Click to save changes to payment settings and go back to the setting page.
1.2. Click to quit without saving changes.
1.3. Click here to set Stripe settings.
Be sure that fill the Payment Method Live.
Write the Keys that Stripe provides you here: https://dashboard.stripe.com/account/apikeys
And that's all, now you can accept credit cards on your Website/App.
Glad we can help
Have a nice day!
Regards, Pol Zepeda