How to pass multiple params to a HttpGet method inside of a C# ApiController?

I have this:

public class RuleController : ApiController { private readonly IRuleManager _ruleManager; // GET: api/Rule/guid [HttpGet] public IHttpActionResult GetRule(Guid id) { var rules = _ruleManager.GetRulesById(id); return Ok(rules); } [HttpGet] public async Task<IHttpActionResult> GetRuleNew(string locale, string pno, string modelYear) { // do cool stuff with my params } } 

my route config:

 config.Routes.MapHttpRoute("DefaultApiWithId", "Api/{controller}/{id}", new { id = RouteParameter.Optional }, new { id = @"\d+" }); config.Routes.MapHttpRoute("DefaultApiWithAction", "Api/{controller}/{action}"); config.Routes.MapHttpRoute("DefaultApiGet", "Api/{controller}", new { action = "Get" }, new { httpMethod = new HttpMethodConstraint(HttpMethod.Get) }); config.Routes.MapHttpRoute("DefaultApiPost", "Api/{controller}", new { action = "Post" }, new { httpMethod = new HttpMethodConstraint(HttpMethod.Post) }); config.Routes.MapHttpRoute( name: "ActionApi", routeTemplate: "api/{controller}/{action}/{id}", defaults: new { id = RouteParameter.Optional } 

calling my route:

https://localhost:44328/api/rule/GetRuleNew?locale=e?pno=2?modelYear=1 

I get:

"Message": "No HTTP resource was found that matches the request URI 'https://localhost:44328/api/rule/GetRuleNew?locale=e?pno=2?modelYear=1'.", "MessageDetail": "No action was found on the controller 'Rule' that matches the request."

What am I missing?