URL API 9.4.1 can be used to send a document to the History List Subscriptions:

The Syntax is as follows:
ASP:
http://[Server Name]/MicroStrategy/asp/Main.aspx?evt=3128&src=Main.aspx.3128&server=[Intelligence Server]&Port=[Port]&Project=[Project]&viewMode=1&objectType=55&objectID=[Document ID]
http://[Server Name]:[Port]/MicroStrategy/servlet/mstrWeb?evt=3128&src=mstrWeb.3128&server=[Intelligence Server]&Port=[Port]&Project=[Project]&viewMode=1&objectType=55&objectID=[Document ID]