Could you provide a demo of some sort on the landing page? I have been writing APIs for over a decade and still have no idea what benefit this provides. Who does it compete with? What differs it from a starter/seed project? Do I still write code or is it a visual interface? What sort of redundancy and reliability does it have, especially since I haven't heard of the project or company before?

$20/month is a bit much for a side project. For a real world project, the price is peanuts if the benefits are there, but the lack of explanation makes it a non-starter for many companies, I would imagine.

Luckily, most of that seems to be marketing and documentation, which shouldn't be too difficult to update, if the product is working correctly at least.