The Google Apps Script binding for the Firebase Realtime Database
Documentation should be migrated to GitHub
In the meantime, here's the installation guide for the Apps Script library: https://sites.google.com/site/scriptsexamples/new-connectors-to-google-services/firebase
The reference guide: https://sites.google.com/site/scriptsexamples/new-connectors-to-google-services/firebase/reference
And tutorials: https://sites.google.com/site/scriptsexamples/new-connectors-to-google-services/firebase/tutorials