Building Type-Safe APIs with Supabase

## Why Supabase? Supabase provides an open-source Firebase alternative with a PostgreSQL database, authentication, real-time subscriptions, and auto-generated APIs. ## Type Generation Supabase CLI can generate TypeScript types from your database schema: ```bash npx supabase gen types typescript --local > src/types/database.ts ``` ## Using the Typed Client ```typescript import { createClient } from "@supabase/supabase-js"; import type { Database } from "@/types/database"; const supabase = createClient<Database>(url, key); ``` Now all queries are fully typed — `supabase.from("posts").select("*")` returns `Post[]` automatically. ## Row Level Security RLS policies ensure users can only access data they are authorized to see. Always enable RLS on every table. ## Conclusion Supabase + TypeScript gives you a powerful, type-safe data layer with minimal boilerplate.