如何调试/显示使用RestClient发送的请求

I am trying to use RestClient to access a webservice using post method. I am sending the authorization token as specified but I am still getting a 403 status error which means I am forbidden to use that api. Is there any way that I can see the request being sent with http post so that I can verify the headers? I am not able to find any example or any documentation which mentions as to how to do that?I am trying to use RestClient to access a webse