Why is it that “No HTTP resource was found that matches the request URI” here?

Your problems have nothing to do with POST/GET but only with how you specify parameters in RouteAttribute. To ensure this, I added support for both verbs in my samples. Let’s go back to two very simple working examples. [Route(“api/deliveryitems/{anyString}”)] [HttpGet, HttpPost] public HttpResponseMessage GetDeliveryItemsOne(string anyString) { return Request.CreateResponse<string>(HttpStatusCode.OK, anyString); } And [Route(“api/deliveryitems”)] [HttpGet, HttpPost] public … Read more