Does Adobe Campaign Standard having bulk API?
Referred this document and found "Create bulk via REST API"
But this page is not having enough information on bulk REST API,
Can someone help here to implement bulk REST API?
I haven't seen anything bulk REST api exists for ACS as of today to create/update/delete profiles. if you're really trying to perform any bulk load then you can try with file load using workflow as option to consider.
Sathees is correct, the recommended way to bulk load is to do so from a file.