An agt file extension is related to the PeerAgents - executable object-oriented email components.
AGT file extension - PeerAgent Typed Executable E-mail data
What is agt file? How to open agt files?
The agt file extension is associated with PeerAgent program and used for Peer Agents - executable object-oriented email components exchanged between users as a basis of communication for distributed applications.
The software is reporting in Alpha Stage with last update in 2004, hence probably no longer worked upon.
MIME types:
application/prs.peeragent
This agt file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.