They have a wide range of demand deposit as well as investment products you can sign up for completely online (assuming you pass your KBA quiz). Accounts are fairly well integrated into their online banking UI, and if your company 401k is also serviced by Fidelity, you can add it along with your other fidelity accounts (this is why I had originally moved to this platform).
Unfortunately, I do not believe they support "read-only" credentials at this time. My experience in this industry tells me this will not be coming to a "mainstream" banking platform any time soon with all of the regulatory chaos that is being anticipated right now. Smaller banking platforms like Ally are more likely to pick up features you are looking for.