AUTH

Google's BaaS platform. Firestore (NoSQL), Realtime Database, Auth, Cloud Functions, Hosting, and ML. Free Spark tier; pay-as-you-go Blaze.

Pre-configured or dynamic OAuth for remote MCP servers.

Open-source Firebase alternative built on Postgres. Auth, real-time subscriptions, storage, edge functions, and pgvector for AI embeddings. Generous free tier.

Drop-in auth for React/Next.js. Pre-built sign-in UI, session management, user profiles, org management. This site uses Clerk for authentication.