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Supabase API

Supabase API

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Supabase is open-source Firebase alternative — Postgres SQL database + auth + storage + realtime + edge functions + vector embeddings.

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Use it when

Real Postgres (not abstraction layer) — any PG tool works

Watch for

Postgres connection limits (free 50, Pro 200)

First check

Create project at supabase.com/dashboard for URL + anon key. JS SDK: const supabase = createClient(url, key); const { data } = await supabase.from("users").select();

Auth
jwt
CORS
?
HTTPS
Yes
Signup
?
Protocol
REST, WebSocket, PostgreSQL
Pricing
freemium

Uptime · 30-day window

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01

About this API

Supabase is an open-source BaaS platform founded 2020 in Australia, positioned clearly as "Firebase's SQL alternative". Unlike Firebase's NoSQL, Supabase centers on Postgres — each Supabase project is essentially a managed Postgres instance + value-add services (auth, storage, realtime, edge functions, Vector). Deep implications: (1) True relational data (foreign keys, JOINs, complex queries all supported, unlike Firestore's limitations); (2) Row Level Security (RLS) for fine-grained permissions written in SQL; (3) Any Postgres tool works (pgAdmin, DBeaver, Prisma ORM); (4) Easy data migration (any Postgres backup tool). Vector embedding via pgvector extension makes Supabase a popular AI app backend. 70k+ GitHub stars, 100%+ annual growth, hottest in open-source BaaS. Free tier 50000 MAU + 500MB DB more than enough for small projects.

02

What you can build

  • 1Web / mobile app backend (auth + DB)
  • 2SaaS startup product backend
  • 3AI applications (vector embeddings via pgvector)
  • 4Migrate Firebase projects wanting SQL relational data
03

Strengths & limitations

Strengths

  • Real Postgres (not abstraction layer) — any PG tool works
  • Open-source (Apache 2.0) + self-host option
  • Real-time (Postgres logical replication to WebSocket)
  • Generous free tier (50000 MAU)

Limitations

  • Postgres connection limits (free 50, Pro 200)
  • Some complex RLS policies are slow
  • Storage slightly more expensive than S3
04

Example request

Generic template — replace <endpoint> with the real path from the docs.
curl https://supabase.com/<endpoint> \
  -H "Authorization: Bearer $ACCESS_TOKEN"
05

Getting started

Create project at supabase.com/dashboard for URL + anon key. JS SDK: const supabase = createClient(url, key); const { data } = await supabase.from("users").select();

06

FAQ

Supabase vs. Firebase?+

SQL/complex queries/RLS: Supabase. NoSQL/Google ecosystem/mature mobile SDK: Firebase.

Self-host or cloud?+

Cloud (supabase.com) is hassle-free. Self-host requires docker + configuring a dozen services, suits compliance requirements.

07

Technical details

CORS: ?HTTPS: YesSignup: ?Open source: No
Auth type
jwt
Pricing
freemium
Rate limit
免费 50000 月活；Pro $25/月起
Protocols
REST, WebSocket, PostgreSQL
SDKs
javascript, typescript, python, go, dart, swift, kotlin
08

Tags

supabasebaaspostgresopen-sourcefirebase-alternative