Happy to help, apologies for the delay!
Please go here to find specific APIs relevant to your business case. https://developer.visa.com/apibrowser
Visa’s Payment Methods APIs aim to help process payments securely, safely, and quickly. 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
Specifically, if you're interested in using Visa Direct, take a look at the top few paragraphs that are shaded in yellow that discuss the requirements to use Visa Direct.
After reading the documentation, if you meet those requirements, then click through the link in those paragraphs to the Visa Direct Program Implementation Questionnaire, fill it out, and submit to the email address listed on that form.
To get started, please follow the steps in the “Working with Visa APIs” link below for steps on how to create a Visa Developer Portal account and how to create a Visa Developer application.
This guide walks you through the key steps for application creation, credentials, and connection validation.
After testing your App in sandbox, send us a production request and we'll evaluate your Application and other credentials.