GraphQL based API?

First, congrats on the project!
I was not present in the announcement in the JS Conf EU but it looks like it was amazing.

At my company, [Wasmer](https://wasmer.io), we created a [WebAssembly Package Manager](https://wapm.io) and used GraphQL for the API. We iterated very quickly with it.

I would really recommend to use GraphQL as a first class citizen for the API, it helps both for the perspective of the server and also for any client using it.
It could also help for any other entity trying to launch a registry that is complaint with your API (since they will just need to validate the their schema against the official one).

Hopefully it's useful... keep up the great work! 👏