My pixel does something similar. It will answer calls and prompt them to basically identify themselves. You can see what they are saying in real time.

I don't remember the last time I had a spam call make it past it. They almost always just disconnect.

https://support.google.com/phoneapp/answer/9118387?hl=en

Could port your number to a voip provider which supports IVR (e.g. voip.ms) and then use a softphone for it.

You’d have to disable inbound POTS though.

> You’d have to disable inbound POTS though.

Why would that be? POTS calls are gated to VoIP above the end-users system.

I’m imagining a cell phine where it’s associated to a phone number no matter what. A lot of consumer providers are incapable/unwilling to provide data-only services. Maybe you can get a machine to machine plan, but that reduced feature set is going to cost you.

For anyone considering this approach, anveo.com has a really nice drag/drop IVR.