This would be much more useful than adding them manually on the site with an imported csv It looks like there is an api to create a beta tester: https://developer.apple.com/documentation/appstoreconnectapi/create_a_beta_tester/ and then inviting a beta tester to an app: https://developer.apple.com/documentation/appstoreconnectapi/send_an_invitation_to_a_beta_tester Sadly not a lot of documentation or examples but it might help. A simpler alternative is to enable a public link, however this solution allows beta testers to stay anonymous. Many companies would like at least a first last for addressing the user in emails.