Is it possible to use HTTP protocol without client-server model

I know this question sounds crazy. It is common sense that HTTP is
based on client-server model. If I want to use HTTP, I have to setup a
server. However, it is unpopular to setup an additional server inside
of a corporate network. So my question is, is it possible for 2 PCs to
communicate with each other with HTTP protocol, while none of them is
set as HTTP server?

Thank you!