Currently the ability to stop or restart an Atlas instance is not allowed from the customer's side of things, and is an action that can only be performed by MongoDB Support.
We would like to have this feature added.

This use case very important for our organization as different application teams should be able to bring up or down the database as they need.
We cannot grant permissions on Atlas console to all the teams in our setup.
Instead, we may have a custom script developed using Javascript or similar scripting languages and enable users to start or stop Atlas instances from a front end, something like chatbot.

We have successfully implemented this for other RDS instances like AWS Aurora.
However not able to do the same for MongoDB Atlas instances.

Hope such features get added to MongoDB Atlas at the earliest.
Thanks for your support.