Explanation Enable Cross-Origin Resource Sharing (CORS) on your Azure App Service Web App. Enter the full URL of the site you want to allow to access your WEB API or * to allow all domains. Box 1: cors Box 2: add Box 3: allowed-origins Box 4: http://testwideworldimporters.com/ References: http://donovanbr own.com/post/How-to-clear-No-Access-Control-Allow-Origin-header-error-with-Azure-App-Service