wb 403WB403 (WB-403) is a novel and potent TGR5 activator with antidiabetic effects. It can improve glucose tolerance and decrease fasting blood glucose, postprandial blood glucose and HbA1c400. Bad request. 401. Unauthorized. 403. Access denied. 429. Too many requests. Response samples. 200; 400; 401; 403; 429. Content type. applicationjson. Copy.