The are multiple endpoints available for accessing and update the EthosCE cart.
Adding a product to a user's EthosCE cart.
Adding a uc_cart_item
// Login to the site and request the access token
$curl = curl_init('http://74.localhost/restws/session/token');
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_USERPWD, "restws_webservice:webservice_password"); // Your web service user credentials goes here.
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
$token = curl_exec($curl);
// The token looks like "q71OBx05wtECfjA0KmXf6wiktewrywNhkMZv-OcfyOA%"
// Send the user creation request, via POST
$data = array(
'cart_id' => 213, // The user's uid
'nid' => 70, // The product's nid
'qty' => 1,
);
$curl = curl_init("http://74.localhost/uc_cart_item");
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($curl, CURLOPT_HTTPHEADER, array("X-CSRF-Token: $token", "Content-Type: application/json"));
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_USERPWD, "restws_webservice:webservice_password"); //Your credentials goes here
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($curl, CURLOPT_HTTPHEADER, array("X-CSRF-Token: $token", "Content-Type: application/json"));
$json = curl_exec($curl);
$response = json_decode($json);
print_r($response);