Great to hear about your payments use case. Please visit the API Browser page for a list of APIs - https://developer.visa.com/apibrowser
Here's a link to Payment Methods APIs that are a good fit for your use case - https://developer.visa.com/site/payment-methods
Visa Checkout lets users skip inputting their payment and shipping information for their orders and works across multiple devices so online shopping is simplified.
VCO Overview - https://developer.visa.com/capabilities/visa_checkout
VCO Documentation - https://developer.visa.com/capabilities/visa_checkout/docs-getting-started
Visa Direct offers businesses and consumers the ability to make payments to eligible card accounts.
VD Overview - https://developer.visa.com/capabilities/visa_direct
VD Documentation - https://developer.visa.com/capabilities/visa_direct/docs-getting-started
See the top few paragraphs that are shaded in yellow that discuss the requirements to use Visa Direct from its documentation page.
If you meet those requirements, review the Visa Direct Program Implementation Questionnaire, fill it out, and submit the questionnaire to the email address listed on that form.
If you have other questions, someone will be happy to assist.
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