How to use programmatically with plus plan?

I have plus plan to use in, is there any way I can use the chat programatically, perhaps by sending the same api the browser uses? note: I don’t want to use as it has different price tags and doesn’t match my need

No you can’t. I mean of course a programmer could make that happen by emulating a human using the computer, but it’s against the rules (there might be a reason for different price tags).