Scripture versions are the intellectual property of various publishers and license owners. To give access to the version via the API, we have to get special permission from the various publishers, and we have not been granted permission to provide those versions as an API. If you already have or can obtain licenses directly from the license holder to use those versions we may be able to make those available to you through the API, given you are able to provide written permission or signed agreement from the rights holder.
To help build trust with the publishers and intellectual property owners, we've built the Fair Use Management System into the API. This helps us provide an extra layer of data on how Scripture content is being consumed by API users and ultimately your application's end users. We are really trying to emphasize transparency with how Scripture content is used via our API, as that will show publishers and IP owners that we are protecting their content and ensuring it maintains the integrity Scripture deserves.