I've included documentation links for you to take a look at. You'll want to look at Visa’s Payment Methods APIs which help to process payments securely, safely, and quickly. Here's the link to Payment Methods APIs - https://developer.visa.com/site/payment-methods
Visa Checkout provides a single sign-in service to pay for online shopping purchases. After a simple setup, Visa Checkout users can skip inputting their payment and shipping information for their orders. Visa Checkout works across multiple devices so online shopping stays easy.
VCO Overview - https://developer.visa.com/capabilities/visa_checkout
VCO Documentation - https://developer.visa.com/capabilities/visa_checkout/docs-getting-started
Visa Direct offers real-time payment capabilities over Visa’s global, interoperable network. Businesses and consumers can make payments to eligible card accounts, using solutions developed with participating financial institutions or payment service providers.
VD Overview - https://developer.visa.com/capabilities/visa_direct
VD Documentation - https://developer.visa.com/capabilities/visa_direct/docs-getting-started