I would do a few things:

- Ensure it is read only (hopefully).

- I would build my own interface to see the transactions. I absolutely hate most banks's default interface to show transactions. I would group them, categorize them etc (yea I know mint exists but we are talking direct APIs)

- I would setup auto notification on certain types of transactions or amount size of transaction. Some banks have alerts but very limited and mostly on amounts. Not on types.

- I would create budgeting notifications based on transactions. E.g. You just spent $500 on Dunkin Donuts this month already. Stop being crazy.