REST API without server

I want to create a REST API in NodeJS that writes and retrieves data from my Atlas.

I don’t want to rent a server for this, I want to deploy the app on a service similar to Google Cloud Functions, without a server to manage. Atlas has something like that?

We actually just announced the Data API at .Local London this morning, but other ways to achieve this have been described in this previous post

UPDATE - this is launched now: