We are using Huru Partner API : https://interview-prep-api.huru.ai/
This API allow job board owners offer interviews for free to their visitors (pay for interviews) or earn from interviews taken by your visitors (Huru subscribers).
For more details : https://interview-prep-api.huru.ai/how-it-works
For any question please contact : support@wpjobinterview.com
Here you can see how job seekers can experience this integration :