Exposed secrets and API key testing
Leaked secrets — API keys, tokens, database URLs, private keys — turn up in JavaScript bundles, API responses, source maps and misconfigured endpoints. The danger isn't that a string looks like a key; it's whether it's still live. Sintropyc finds exposed secrets and proves which ones are actually active, safely.
Where secrets leak
- Frontend JS bundles — keys bundled into client code (Stripe secret keys, cloud creds, third-party tokens)
- Source maps —
.mapfiles that expose your original source and inline secrets - API responses — tokens or internal fields returned where they shouldn't be
- Config and repo exposure — a reachable
.env,.gitor backup file - Verbose errors — stack traces leaking connection strings and keys
A key is only a finding if it's live
A random-looking string isn't a vulnerability — a working credential is. Test keys, revoked keys and placeholders are noise; reporting them as criticals is how scanners lose trust. The real question is whether the key still authenticates.
Sintropyc validates a discovered secret with the smallest safe, read-only check against the right provider — confirming it's active without moving money, changing data or touching real user records. A finding means a working key, not a lookalike.
How Sintropyc tests it
Sintropyc is an autonomous AI penetration testing agent. It signs in as real users across different roles, drives your product the way a customer would, and proves every finding with a working exploit — never a scanner guess. Each finding is checked by a human before it reaches you, comes with the exact fix, and is attacked again after you ship it to confirm it held.
For secrets, Sintropyc harvests candidate credentials from bundles, source maps, responses and reachable config, filters lookalikes, and — where safe — validates each against its provider with a benign read-only call to prove it's live. Every reported secret comes with where it was found and evidence it still authenticates.
What you get
- Bundles, source maps, responses and reachable config swept for secrets
- Each secret triaged live-vs-dead — only working credentials reported as findings
- Impact per key (what it grants) and the exact rotation / removal fix
- A retest after you rotate and redeploy
Common questions
Do you actually use the keys you find?
Only the smallest safe, read-only validation to confirm a key is live — never a call that moves money, writes data or reads real customer records. Nothing destructive.
Isn't the Stripe / Supabase anon key in our frontend supposed to be public?
Publishable and anon keys are meant to be public — Sintropyc knows the difference and won't flag them. It's the secret keys and over-privileged tokens that end up in bundles by mistake that matter.
How is this different from a secret scanner like Gitleaks?
A regex scanner tells you a string looks like a secret. Sintropyc tells you it's live — turning a wall of noise into the handful of keys that are actually a breach.