I'm using Secure Settings, but my proxy is constantly breaking because it seems that Zendesk is not allowing me to send the API request to my external server out.
The Zendesk request also sends my Base64 encoded Zendesk login data in the request - which is rather concerning.
Are there some limitations/IP addresses which can't use the Zendesk proxy for Secure Settings?
When I tried making the request on Postman with https://<subdomain>.zendesk.com/proxy/v2/apps/secure (no trailing path), I get Proxy Not Allowed. What am I missing here?

Can you try adding
cors: trueto the request options. This will prevent the request from routing through the Zendesk proxy server.If you continue to see the error, let me know and we can look in to this in more detail.
Thanks!
Tipene