question

Yes, you can make Http requests from CloudScript to any web API endpoint, using standard REST calls. You can check this documentation -- Making Webhook calls from CloudScript for more details about how to do a web API call from CloudScript. Besides, you can navigate to [Game Manager]->[Automation]->[Cloud Script]->[Revision] to find the following sample in the [Revision 1].

// This is a simple example of making a web request to an external HTTP API.
handlers.makeHTTPRequest = function (args, context) {
    var headers = {
        "X-MyCustomHeader": "Some Value"
    };

    var body = {
        input: args,
        userId: currentPlayerId,
        mode: "foobar"
    };

    var url = "http://httpbin.org/status/200";
    var content = JSON.stringify(body);
    var httpMethod = "post";
    var contentType = "application/json";

    // The pre-defined http object makes synchronous HTTP requests
    var response = http.request(url, httpMethod, content, contentType, headers);
    return { responseContent: response };
};