Ask HN: Should I release my MidJourney API? 3 years ago
As much as I would love for an API (official or not) to appear, you'll much likely get into some sort of trouble doing so. If you're violating their ToS, there's not much you can do.
You can use it for yourself without attracting too much attention or make it available open source. Creating a business around it like ImagineAPI seems to be evolving into, is risky I guess.
How did you get access to their API in the first place? Using bots through Discord or you find out their secret endpoints?
Best of luck!