Is there a publicly available schema for the Admin GraphQL API?

[IstohG]

Does anyone know if there's a publicly-available schema of the Admin API? Or can you only access it via a store's authenticated endpoint (e.g https://<STORE>.myshopify.com/admin/api/<VERSION>/graphql.json)? 

I'm in a situation where my continuous integration system needs the schema to generate a client-side library at build time, and the specifics of the CI make it such that I can't pass an environment variable without making it public. Because the authentication header requires a secret key, I obviously don't want to do this. I'm wondering if this info is exposed via a public API, since Shopify exposes a publicly-browsable version of the API in the online documentation.