Google Authentication for Node.js & Python

Libraries

Node.js

• google-auth-library — core auth library (OAuth2Client, GoogleAuth, JWT, Compute, Impersonated)
• googleapis — Google API client (wraps google-auth-library)

npm install google-auth-library
npm install googleapis

The client.fetch() calls below require google-auth-library ≥ 10.1.0 (the fetch-compatible API landed in 10.1.0, 2025-06-12); on 9.x use client.request() with the same arguments. Checked 2026-08-31: latest is 11.x and keeps both methods.