OAuth applications are now available to all PlanetScale users in a public beta. An OAuth application in PlanetScale allows you to get authorization from your users for which organizations and databases the PlanetScale API can interact with.
If you are interested in building on top of PlanetScale and allowing your users to authenticate with PlanetScale to gain management access to their organizations and databases, you can create your OAuth application in your PlanetScale organization’s Settings > OAuth applications page.