Hey @sameer-syedmanzur!

If you're on any paid plan, I'd recommend looking at our Generic Messengers.

When the generic messenger is hit, it fires off a request to any HTTP endpoint you want. You can then use any method you need to to get the code to the user or post it back to the API to complete the 2nd factor.

If you're on the Community edition (free version), that's not accessible to you, though.

For solution on the community edition, check out this doc if you haven't read it yet: https://fusionauth.io/docs/lifecycle/authenticate-users/multi-factor-authentication#build-your-own-interface

That's how you set up a custom interface for TOTP. That would be the best-practice way of doing 2fa without smtp on community edition. I haven't done anything TOTP-based for testing, but I'd wager there's a TOTP application with an API that could handle this.

Depending on the use case, it might also make sense to set up something simple with something like MailTrap to do testing via SMTP instead of going through all this. That may be a problem depending on the use case, though