External .JSON api calls format for purchased compendiums

I'm working on a DND helper tool that makes use of Roll20's open compendium through the following external calls: For example: <a href="https://app.roll20.net/compendium/dnd5e/cat.json" rel="nofollow">https://app.roll20.net/compendium/dnd5e/cat.json</a> <a href="https://app.roll20.net/compendium/dnd5e/eldritch_blast.json" rel="nofollow">https://app.roll20.net/compendium/dnd5e/eldritch_blast.json</a> Here's a quick screenshot from the work in progress tool &nbsp; If I purchased a compendium expansion, like Volo's Guide - What would an 'external' API call to fetch Volo's Guide .JSON data, look like?&nbsp;&nbsp; I believe there would be an authentication code of some kind to show proof of purchase in order to access the data.

The same as the others.&nbsp; For example:&nbsp; <a href="https://roll20.net/compendium/dnd5e/Lore:Beholders.json" rel="nofollow">https://roll20.net/compendium/dnd5e/Lore:Beholders.json</a> &nbsp;: would be the Lore of Beholders URL and it would have a structure like: { "name": "Beholders", "id": 12296, "content": "&lt;TEXT CONTENT&gt;", "htmlcontent": "&lt;HTML CONTENT&gt;", "data": { "Source": "Volo's Guide to Monsters", "Category": "Lore", "data-List": "false" } }

Thanks for your response Aaron, I thought I'd get an email notification on the followed-topics, so I'm late to reply. I feel like there's a compendium forum post I'm missing that discusses how to create these URL calls. Can you direct me to where I can find this information? What I want to do overall is build an app that allows me to access the free compendium - so bestiary, spells, etc.(currently this is working) and also displays purchasable compendiums to a mobile user, so they have an option to purchase and have greater access to the info through the app's tools. If the user has previously purchased a compendium through roll20, is there an authentication process to go through from an external call (from a phone request, not a web browser that senses you're signed in?). I'm not sure if roll20 has anything like this setup. I did contact them but have not received an adequate reply as of yet. I'm appreciative of any kind of direction you can provide on this, thank you.