3. Do I need to apply beforehand or submit documentation to create an API? July 01, 2021 03:59 Updated Absolutely not. There is no application or documentation required to use the ADDX Open API. Related articles 4. What does ‘usage’ mean for the Open-API? 1. What fees does ADDX charge issuers? 11. I am unable to view or download the documents from ‘My Documents’. What should I do? 1. What are open-end funds? 7. Why do I need confirm that I have an authentication method in place? Comments 0 comments Please sign in to leave a comment.