We swaggerized the API in oxd 4, so you can generate native libraries as needed:
https://www.gluu.org/docs/oxd/#native-libraries
With respect to the plugin, we would like to update it, but it's not a high priority on our roadmap currently.
If you'd like to discuss helping fund the upgrade which would add some priority, feel free to reach out to me at will at gluu.org
Thanks,
Will