Hey @ikatz - you’re right about that link to the definitions.json and application_hosts.json being swagger specs that you can find publicly.
What we don’t have publicly is a document detailing our use of swagger, and a doc of swagger specs for our customers to build upon, like you are.
I have spoken with Jemiah about this, he is on the product management team focussed on our open source & programmable, developer ecosystem.
His team are heavily focussed on building out more improved experiences with New Relic in the programmability space. That’s where this post lives right now, as a feature request to improve our public documentation on our Swagger specs and to also include that with developer.newrelic.com
This post is tagged to that feature request, so we can work on getting this thread updated when we have more on that.