The Jumio Java SDK by Adalbert Wysocki communicates with the API as a plugin to access identity verification features. Resources include installation and usage. An example demonstrates how to request a card scan with name, values, and description.
Recent investigations show how users can be authenticated via web without using passwords. It’s called WebAuthn or Web Authentication that uses a Web API in a browser. Clients can be verified with their phones, hardware keys, or trusted devices. In his article, Nick Steele explains the new standards
Developers are opting for phone verification over email verification as it is effective in reducing spam accounts. Adding phone verification to your app doesn't need to be complex. This tutorial shows how to use Nexmo Verify SDK for iOS in a "To-Do List" application that uses Parse for a backend.