The default is HttpVerbs.All.
<remarks> Requests that fail to access the endpoint with the right HTTP Verb will not get called and return a 405 error along with an error object (JSON/XML) that details the error in the body. </remarks>
public HttpVerbs AllowedHttpVerbs { get; set; }
// Allow both GET and POST operations [CallbackMethod(AllowedHttpVerbs=HttpVerbs.GET | HttpVerbs.POST), RouteUrl="stocks/{symbol}"] public StockQuote GetStockQuote(string symbol) { ... }