You don't need to use a browser; there's a simple JSON RPC interface.
Such as embedded processors, just to use an example that might be exactly the type of people who would find this challenge extra interesting.
Full disclosure: I did several of these, but the browser issue is probably what kept me from doing more. It did not run in my (admittedly outdated) browser of choice, so I had to do some Chrome wrangling, which was the opposite of fun.
Okay, if someone is hardware oriented and has never stepped outside the assembly and C world, then doing it from C isn't particularly convenient - but even with such background I would assume that most embedded processor people would know one of those scripting languages just to automate stuff in their development/testing workflow.
If your point is "that's not helpful for people who don't know how to use HTTP and JSON", I'm at a loss, because the problems Microcorruption wants you to solve are much, much harder than HTTP.