vMix already exposes all the inputs via the API, just use it to build your autoconf module, it's just a matter of a few lines of code

https://www.vmix.com/hel...eveloperInformation.html

I know what Bonjour is and why it is used but I don't understand why you want to use it:
- I clearly don't want my vMix hosts to be publicly exposed to the LAN and risk to have people "playing" with the webcontroller without my conscent
- those who need tallies can ask the producer which IP/port to use
- vMix is not like NDI where you want to have streams available on the network for anyone. vMix is a production software, not for anyone on the network
- most 3rd party apps that rely on vMix just have a setting for IP/Port to establish connection if the producer agrees. Again I don't want anyone to be able to mess with my setups.

I see what you want to do, but it seems you're forgetting that such protocols are an open door to problems.

Surely you'd have password authentication enabled in vMix if you were worried about that...
Ruudboon's suggested option to enable or disable the IP announce would also get around the issue of having multiple vMix instances running on the same network.
Having a Tally system automatically find a vMix instance would take a lot of hassle out of adding new tally lights into an existing setup, so I can definitely see the benefit.

+1