This module is an AnyEvent user, you need to make sure that you use and run a
supported event loop.

This module implements a simple, stateless and non-blocking HTTP client. It
supports GET, POST and other request methods, cookies and more, all on a very
low level. It can follow redirects supports proxies and automatically limits
the number of connections to the values specified in the RFC.

It should generally be a "good client" that is enough for most HTTP tasks.
Simple tasks should be simple, but complex tasks should still be possible as
the user retains control over request and response headers.