Anyone who lives, works, or attends school in Massachusetts is eligible for a Boston Public Library card. No time to come to the BPL? Register online (https://www.bpl.org/ecard/) for an eCard that gives you access to their extensive online resources, including all of JSTOR. You can upgrade an eCard to a physical card at any BPL location.
Note that you cannot register for an eCard from abroad, and not all resources will work outside the United States due to vendor licensing restrictions.