Google Play EMM API

Create an OAuth 2.0 client in Google Cloud Console Credentials, then obtain a user access token for the https://www.googleapis.com/auth/androidenterprise scope as described in Authorize requests. Existing EMMs also need participation in the EMM community; Google states it no longer accepts new registrations for the Play EMM API.

Create an API key in Google Cloud Console Credentials. The API discovery document for this service says the key query parameter is accepted and is required unless you provide an OAuth 2.0 token. Note that individual methods in the discovery document also declare the https://www.googleapis.com/auth/androidenterprise scope, so practical access may still depend on being an existing registered EMM.