Most browsers will allow your script make XMLHttpRequest to a CORS Domain, but you can't exchange cookie data unless you use a secure connection (HTTPS). Set to NONE if you want to bypass IAM authentication to create a public endpoint. Curl will ignore all security warnings for invalid certificates and accept them as valid. AllowCredentials (Boolean) This option explicitly tells Curl to perform insecure SSL connections and file transfers. See CORS-safelisted Using the express CORS Middleware is a 2 line code solution for this. Note that disabling inline JavaScript means that all JavaScript must be loaded from