I will say that while annoying (especially for Chase, which has the most paperwork-type requirements for developers) this process should be totally doable for solo developers. You can put your own name as the legal entity name if you don't have a company. The Master Services Agreement (MSA) sounds scary but is just the contract between you and Plaid -- the legalese laying out what you're paying for, what Plaid is providing, and the rights and obligations of both parties. And when it comes to the security questionnaire, fill it out as accurately as you can, but you don't need to stress over it -- Plaid doesn't expect a solo hobbyist to have the same security measures as, like, a publicly traded company.
I will say that while annoying (especially for Chase, which has the most paperwork-type requirements for developers) this process should be totally doable for solo developers. You can put your own name as the legal entity name if you don't have a company. The Master Services Agreement (MSA) sounds scary but is just the contract between you and Plaid -- the legalese laying out what you're paying for, what Plaid is providing, and the rights and obligations of both parties. And when it comes to the security questionnaire, fill it out as accurately as you can, but you don't need to stress over it -- Plaid doesn't expect a solo hobbyist to have the same security measures as, like, a publicly traded company.