I am not sure if I understand your request correctly. You can have upto 100 participants in a Zoom meeting. You need not create/schedule the meeting via API.
We have some TVs in the hall, lobby and corridors of our office, with Mac Minis and Zoom clients installed.
I want to have them all join a meeting at a specific time without having to connect to each Mac Mini individually to interactively launch Zoom, type in a meeting ID and password in each of them.
Ideally, this should be done with no interaction whatsoever.