There seems to be value here in describing APIs to external developers and giving them a playground for it. Well, there is value there because some large compan

There seems to be value here in describing APIs to external developers and giving them a playground for it. Well, there is value there because some large companies do that as their product. There isn't a great solution for writing API documentation, still, although something like this probably helps a good bit. Even better if the real implementation is validated by the doc