Can someone clarify what to do if your app doesn't use a custom domain, and running `heroku domains -a` just returns `my_app.herokuapp.com`, and then entering that into https://securitytrails.com/dns-trails returns no results?
No we just run our API on heroku and use no custom domain names. For some of us requests are working as normal, but for others every request is failing.
What error are you getting? Because for us it seemed that the Cloudflare <-> HerokuDNS link was down. But even then I was able to access my app from the dashboard (like https://my-app.herokuapp.com/)