edX offers financial assistance to learners who demonstrate that paying the verified certificate fee would cause economic hardship.
Financial assistance currently provides a 80% reduction in the verified track fee. You can find detailed steps on applying for Financial Assistance in this article: How do I apply for financial assistance?
Financial assistance is not currently available for Professional Education courses and select MicroMasters courses. While Boot Camps also do not offer traditional edX Financial Assistance, you can learn more about payment options for Boot Camps here.