I finished my mvp and bought the domain chartit.io.
The product is more than an mvp as it included a lot of features that I was planning on releasing in version 2, but I'm glad I put in the extra work to make it useful right out of the gate.
As it stands now, you can create and share charts including setting most available chart options.
I didn't yet build out the monetization aspect but put in a link to get notified once it becomes made available. I'm not tied to any business model and the site can exist without it. I'm just looking to get some sort of feedback and adoption before I decide on the way forward.