backend
Supabase Errors
Supabase errors: 401 invalid JWT, 403 RLS policy violation, 406 invalid query, 409 unique constraint, 503 capacity. Most issues are RLS policy mistakes or PostgREST query errors.
Supabase wraps Postgres + PostgREST + Auth. RLS policy errors return 403 with hint in response body. JWT issues return 401. PostgREST returns 406 for malformed queries (wrong filters, embed syntax). Always test policies with the SQL editor first. Connection pooler exhaustion shows as 503.
Official docs
https://supabase.com/docs/guides/api/rest/error-codes
Status page
https://status.supabase.com/
Support
https://supabase.com/support