Comment by AlexanderNull

I set up a job posting sentiment analysis ML app on the Who's Hiring post recently and use a the public firebase REST API: https://github.com/HackerNews/API . It mostly works for my usecase but its search capabilities are severely lacking over REST so might not be the best in your case. I never got around to trying a firebase client so I have no clue if it interacts with a different interface, might be worth taking a quick look at.