Is there a Rest API reference for Transmittal, Bulk Load, MFT for engineering module

Hi All,

I want to develop application to call rest API to do a Transmittal and Bulk load in the Engineering module.
I found that in the 'OpenText Extended ECM for Engineering  16.3.6 - Administration Guide English (LLESENG160306-AGD-EN-1).pdf' - page 159 refer to '<Content Server_URL>/api/v2/crt/vendor/initiatebulkload'
However, I cannot get any URL to access the documents about this.

Is this available to be used?
If this is available what is the URL for this API references?

Thank you