Reached 50$ MRR on a personal project and I love it. But how to grow from here?

Hey guys! I just last month reached about 50 USD MRR on Superhero Search API. It gets a few users here and there but because of the platform I'm using (rapidAPI) I really can't get in touch with them directly.

So, without having direct emails with users, how do I grow from here, do I optimize monetization by playing with the pricing dials?

Also, for an explanation of what the API does, here's an article: https://thewriting.dev/p/so-who-uses-a-superhero-api-anyway