Is there an API : "External Recruting to Pending Hire(draft)"?

Hello, my clients have a external recruting system. They asked "interface with SuccessFactors' "'Hire". Casue They used to send candiates' information to their legacy HR system to hire. I think we could save the informato as a "draft" in "Manage Pending Hire". But I couldn't find proper API. Please help!