We are developing a publicly accessible API portal. The work is described by the API Gateway documentation plan.
As part of this project we will be launching a new wiki on which we plan to use the WikimediaApiPortal skin.
The software cannot yet be installed on the Beta cluster, since it is still undergoing Security Review (T246949). In the meantime, you can preview the software at https://apigateway.wmf.labs.hallowelt.biz, which is the demo site maintained by the contractor, Hallo Welt, that is developing the API Portal for WMF.
Which code to review
Note: This task was formerly about performance review of the Chameleon skin, Bootstrap extension, and SCSS library upon which the WikimediaApiPortal skin depended. But, as a result of this review, WikimediaApiPortal no longer relies upon those elements.