REST Jquery AJAX

Hello everyone,

I'm frustrated because what I want to achieve is supposed to be simple stupid. I'm simply trying to access product information from an outside non drupal site.

I have installed everything (services, inputstream, autoload, ctools)
I configured the REST server as follows :
Response formatters : json
Request parsing : application/json & application/x-www-form-urlencoded
gave a path to endpoint and no authentification
ticked all ressources.