using RestSharp;


var options = new RestClientOptions("https://api.sandbox.{id}.gr4vy.app/transactions/{transaction_id}/actions");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

{
  "items": [
    {
      "type": "action",
      "id": "route-transaction",
      "flow": "checkout",
      "rule_id": "8724fd24-5489-4a5d-90fd-0604df7d3b85",
      "created_at": "2012-12-12T10:53:43+00:00",
      "outcome": {
        "type": "boolean",
        "result": true
      }
    }
  ]
}