When I'm writing a script that requires some kind of call to an LLM, I use this: https://github.com/simonw/llm.

This is of course cross-platform and works with both models accessible through an API and local ones.

I'm afraid this might not solve your problem though, as this is not an out of the box solution, it requires the user to either provide their own API key or to install Ollama and wire it up on their own.