I need to give Inventory Organization Access to more then 100 responsiibilities. Is there an api that I can use that would load this information into org_access table? I am on 12.1.2 version of EBS.
I am not aware of any api for this.
You can consider using a key-mapping software such as Data loader / winparrot
you can write your own script to insert records into the table. It should be a straight forward insert. You just need to ensure that the combination of organization_id, responsibility_id and application_id is valid.
I do such load with WinParrot, it is very easy to record/modify a macro with this freeware.
With the new version 2.0 it inclued examples for Oracle EBS 11i and 12i (http://www.winparrot.com).