All banks work in the free Development environment, but for banks on OAuth, including Chase, you need to go through the Production approval vetting as a pre-req

All banks work in the free Development environment, but for banks on OAuth, including Chase, you need to go through the Production approval vetting as a pre-requisite. Once you've been approved for Production (and if applicable for the given bank, gotten your security questionnaire approved as well -- I think Chase requires this) you can then access those banks in Development for free.