Bulk Upload API of Jobs

Good day sir/ma'am,

May I ask, is there an API for bulk upload of jobs? along with attachments if possible? I can't find any API for this one. If none, is it OK to use this API (https://developer.servicem8.com/reference#post-job-create) with multiple requests like around 50-100 jobs? and I am thinking during those iterating requests, our system will call the API for attachments as well?
Additionally, on your Client UI, is there a bulk upload for Jobs? if the above is not possible, i am thinking to sync the data in reverse (towards to our system) instead.

Hoping for your quick response.

Thank you,
Renz