Add recipient to profile list using Rest API

Hi experts,

As checking REST API https://docs.oracle.com/en/cloud/saas/marketing/responsys-rest-api/api-profile-extension-recipients.html there is way to retrieve, merge or delete a recipient. But there is no API to add recipient to profile list.

For website registration: let say we want to add anyone, who register via registration, into Responsys. Then using REI to capture their activity like: view product, add product to cart, checkout... The solution that I can think right now is:

1 - Contact register via registration form on website will export to csv file and put to SFTP server

2 - Connect job will run to import contact to profile list