I am trying to access CQ configuration in my application using CQ HTTP client. I am able to access through ConfigAdmin, but not directly.
Please suggest a way to access the configuration directly by CQ HTTP client.
Is CQ proxy settings directly available to CQ HTTP client? if so, how do we access it?
Yes it is directly available. The proxy does not need to be explicitly configured for each HttpClient since it is done automatically when the com.day.commons.osgi.wrapper.commons-httpclient gets activated. Make sure your bundle imports  and call as HttpClient client = new HttpClient();
org.apache.commons.httpclient,version=3.1.0 from com.day.commons.osgi.wrapper.commons-httpclient (xx)
org.apache.commons.httpclient.methods,version=3.1.0 from com.day.commons.osgi.wrapper.commons-httpclient (xx)