Custom Objects - Automate bulk import

Summary

We have defined custom objects and want to load data using bulk import activity available in import management

Content

Hi Team,

We have defined a custom object under ERP & SCM and able to create, update data using REST API. Now we want to automate the bulk import of custom object - available under import management, is there any web-service REST/SOAP available to automate the same?

Thanks,

Rahul