Thanks for being part of the Visa Developer Community! Please see the Getting Started with Visa Developer documentation below, you'll find sample code that lets you know the languages we use and the tools to get you started with Visa APIs.
Getting Started with Visa Developer
Please let us know of any other questions.
Thank you for your response but the VISA API Documentation describes only how the APIs work. I would like to know how the documentation itself is done. Could you please guide me with what tools and standards you use for the documentation?
One of the best way to create API documentation is by using Swagger Editor and Format. Please visit the below link to get more information on the swagger editor and UI.
Swagger is the world’s largest framework of API developer tools for the OpenAPI Specification(OAS). Give it a try.