Library for RESTClient

Hello everyone, 
I'm new to this forum.I have a question,
do you know a library for RESTClient to retrieve data via a WEB API? I already tested what I found on google but it did not work.
sorry for English, I'm not good at English .

CodeIgniter - restclient

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

Guzzle can be used via composer:

https://github.com/guzzle/guzzle

http://docs.guzzlephp.org/en/stable/

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