Sounds like what Microsoft tried to do with the .NET ecosystem, but with cloud integration (which Microsoft should be doing for their own cloud) and API validation.

Someone needs to actually succeed at doing this. Most of the type-checking/inference problems in this domain are decidable -- it's really a tooling/tooling integration problem. Creating a single unified tool instead of having developers clobber together libraries (JSON schema validator, ORM, MVC framework, deployment workflow for all of that, etc.) would be a huge value-add.

Suggestion: code example/screenshot/workflow video on your homepage, and a link to your homepage in the advert. Nearly every programming language/library out there has a concise "hello, world" example on their homepage. Nearly every software development tool has a screenshot of sorts on their homepage. Those examples are worth a million words. Even an appropriately caveated "Wizard of Oz" (https://en.wikipedia.org/wiki/Wizard_of_Oz_experiment) demo would go a long way.