API penetration testing

Research-led API pentest, BOLA, BFLA, and the chains underneath.

CREST-accredited researchers test REST, GraphQL, and gRPC APIs for broken object auth, broken function auth, mass assignment, and chained business-logic abuse. Two weeks from kickoff to a report your auditor accepts.

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Trusted by security teams across Fintech, SaaS & Education, Enterprise & Telecom, Security & Critical Infrastructure

Airbase
Quiltt
Pacvue
Imagine Learning

Why this matters

Most API pentests stop at status codes. The bugs live in chained calls.

  • Checklist API tests miss BOLA, BFLA, mass-assignment, and chained-call abuse. That's the class of bugs that breach.

  • OpenAPI specs lie. Manual testing on actual auth flows surfaces what spec-only firms skip.

  • Reports listing status codes, not exploit chains, get ignored by both auditors and engineers.

Here is what we do differently.

Why teams pick us

Bugs that breach, found before they ship.

  • Business-logic depth

    BOLA, BFLA, mass-assignment, IDOR, broken auth across roles, tenant boundaries, and webhook flows.

  • Spec plus discovered surface

    Test what your docs say AND what your traffic shows. Shadow endpoints included.

  • Chained cURL reproducers

    Each finding ships as a cURL chain that recreates the exploit, not a status code.

How it works

From spec to report in two weeks.

  1. Scope and auth

    Share the spec (OpenAPI or Postman) and an auth flow per role. Fixed-price scope on the call.

  2. Pentesters chain calls

    Manual testing across roles, tenant boundaries, and admin paths. Discovered endpoints included.

  3. Findings hit your tracker

    cURL chain, severity, business impact, fix path. Re-test when you ship.

Research ledger,

What our researchers find in production APIs.

Coordinated-disclosure advisories published by SecureLayer7 research.

Full advisories index

What founders say

“Thank you for being our pentest partners. Our user base is safer because of y'all.”
Vinay Hiremath

Vinay Hiremath

Co-founder, Loom

View tweet

Common questions

What buyers ask before they sign.

Which protocols?
REST, GraphQL, gRPC, WebSocket. Auth via OAuth, JWT, session, custom headers.
Do you need an OpenAPI spec?
Helpful, not required. We discover the surface from traffic and reverse engineer auth flows.
Will you find business-logic bugs?
That's the point. BOLA, BFLA, mass-assignment, race conditions, chained abuse.
How does this compare to a checklist pentest?
Checklist firms run a pass-fail list against the spec. We chain calls across roles and tenants until something exploits. Reports are not the same artifact.
Is the report auditor-ready?
Yes. Findings shaped for SOC 2, ISO 27001, and PCI DSS evidence with reproducer and remediation.

Ready to find the API bugs that breach?

20-minute scoping call with the lead API pentester. REST, GraphQL, gRPC, and the auth flows that hide the bugs.

CREST · CERT-In · SOC 2 · ISO 27001