The Supabase anon (publishable) key is safe in clients only when Row Level Security is enabled on every exposed table. The service_role (secret) key bypasses RLS entirely and must stay on a server or edge proxy, never in a mobile app, FlutterFlow project, or browser bundle.
Safe only when RLS policies restrict what each user can read and write.
Bypasses all RLS policies with full database access.
Signs user tokens. Leaking it lets attackers mint any identity.
Write policies using auth.uid() so each user can only touch their own rows, and test them with the anon key.
Admin reads, cross-user joins, and webhook writes belong in an edge function or proxy holding the secret key.
Users can edit their own user_metadata. Store roles in app_metadata or a protected table.
Anyone who extracts it gets unrestricted read and write access to your whole database.
With RLS off, the anon key can read and modify every row through the REST API.
Policies like user_id = request parameter are spoofable. Compare against auth.uid().
Keep SUPABASE_SERVICE_ROLE_KEY in the vault and expose narrow, read-only pipelines (profiles, plan status) that return slimmed JSON. Clients keep using the anon key with RLS for user-scoped data, and never see the secret key.
Yes, if every exposed table has RLS enabled with correct policies. Without RLS, the anon key grants open access to those tables.
Only in trusted server or edge code, such as admin jobs, webhooks, and aggregation pipelines that must read across users.
The Supabase service_role key bypasses all Row Level Security (RLS) rules. If leaked, an attacker has unrestricted admin access to your database. RealComposer keeps your service role key in the Secret Vault and exposes locked-down endpoints with strict output filtering.
Instead of having your frontend make 2 separate requests over high-latency cellular networks, RealComposer fetches your Supabase user record and Stripe subscription details concurrently using Promise.all on Cloudflare Workers, returning a unified JSON payload in a single round-trip.
To combine firebase auth user with supabase profile endpoint, use one RealComposer pipeline with parallel steps. Firebase ID token lookup and Supabase profile row merged at edge. Your React / Flutter / Mobile app makes one request instead of several sequential upstream calls.
To solve combine supabase auth user with custom billing api, never execute unauthenticated requests or embed private tokens directly in client bundles. RealComposer acts as a sub-10ms edge gateway running on Cloudflare Workers that securely injects credentials from your Secret Vault, normalizes responses, and prevents unauthorized API usage. Route calls through your RealComposer edge URL to guarantee complete privacy, robust origin validation, and low mobile latency.
To solve combine openai embeddings and supabase vector search in one call, never execute unauthenticated requests or embed private tokens directly in client bundles. RealComposer acts as a sub-10ms edge gateway running on Cloudflare Workers that securely injects credentials from your Secret Vault, normalizes responses, and prevents unauthorized API usage. Route calls through your RealComposer edge URL to guarantee complete privacy, robust origin validation, and low mobile latency.
To solve combine algolia search results with supabase user favorites, never execute unauthenticated requests or embed private tokens directly in client bundles. RealComposer acts as a sub-10ms edge gateway running on Cloudflare Workers that securely injects credentials from your Secret Vault, normalizes responses, and prevents unauthorized API usage. Route calls through your RealComposer edge URL to guarantee complete privacy, robust origin validation, and low mobile latency.
The principle of least privilege states that every user, service, and credential should have only the minimum permissions required to perform its task. For APIs, this means using restricted keys, narrow OAuth scopes, and client tokens limited to specific endpoints.
Service Account CredentialsService account credentials are non-human identities, such as Firebase Admin service account JSON or a Supabase service role key, used by backend systems to access APIs with elevated privileges. They often bypass user-level security rules, so exposure grants full administrative access.
Credential LeakageCredential leakage is the unintended exposure of secrets such as API keys, tokens, and passwords. Common sources include JavaScript bundles, decompiled mobile apps, public Git repositories, browser network logs, and low-code platform configurations visible to users.