ClaimsAuthorizeAttribute.cs

using System.Security.Claims;
using System.Web.Http.Filters;

 public class ClaimsAuthorizeAttribute : AuthorizationFilterAttribute
    {
        private string claimType;
        private string claimValue;
        public ClaimsAuthorizeAttribute(string claimType, string claimValue)
        {
            this.claimType = claimType;
            this.claimValue = claimValue;
        }
        public override void OnAuthorization
        (System.Web.Http.Controllers.HttpActionContext actionContext)
        {

            ClaimsIdentity claimsIdentity;
            var httpContext = actionContext.RequestContext;
            if (!(httpContext.Principal.Identity is ClaimsIdentity))
            {
                return;
            }
            

            claimsIdentity = httpContext.Principal.Identity as ClaimsIdentity;
            var currentReqClaimValue = claimsIdentity.FindFirst(claimType);

            if (currentReqClaimValue == null ||currentReqClaimValue.Value != this.claimValue)
                throw new UnauthorizedAccessException("Not authorized to access the api");

            base.OnAuthorization(actionContext);

        }
    }