or, any()}, NewAgent::<a href="#type-agent">agent()</a>}</tt><br></p>
<p> </p>
</div><p>
  <h4><a name="A_HTTP_HEAD_request_with_a_timeout.">A HTTP HEAD request with a timeout.</a></h4>
</p>

<h3 class="function"><a name="head_async-4">head_async/4</a></h3>
<div class="spec">
<p><tt>head_async(Agent::<a href="#type-agent">agent()</a>, Prefix::<a href="#type-service_name">service_name()</a>, RequestInfo::<a href="#type-headers">headers()</a>, Request::binary()) -&gt; {{ok, <a href="deps/cloudi_core/doc/cloud