The Developer Hub has a Explore section where users can play with the API in a functional sandbox.
Since the sandbox probably relies on the platform where it is used, and since the platform used in the prototype might not be the final, we need to discuss. The default approach is to have a proof of concept in MediaWiki, because MediaWiki currently is the default platform considered for the Developer Hub.
This API sandbox needs to be tested against the three APIs selected for the prototype.
See also: