API Penetration Testing
Deep testing of REST, GraphQL, and gRPC APIs against the OWASP API Security Top 10.
API penetration testing is deep, manual testing of REST, GraphQL, and gRPC endpoints against the OWASP API Security Top 10 — targeting authorization, data exposure, and abuse paths that only surface when a human chains requests.
Where attackers get in — and where we look.
Broken object-level authorization (BOLA)
Broken function-level authorization
Mass assignment
Rate limiting & resource abuse
Token & key handling
A proof-driven methodology.
Scope & recon
We agree objectives and rules of engagement, then map what you actually expose.
Map the attack surface
Enumerate entry points, roles, and trust boundaries a real attacker would target.
Manual exploitation
Certified testers exploit flaws by hand — chaining issues scanners never connect.
Prove impact
Every finding ships with a working, reproducible proof-of-exploit and business context.
Report & retest
Risk-ranked report with fixes, then a retest that confirms each issue is closed.
Proof you can act on.
Reproducible proof-of-exploit
Every finding ships with a working exploit and evidence.
Risk-ranked report
CVSS + business context, prioritized for your team.
Remediation guidance
Actionable fixes mapped to each finding.
Retest to verified fix
We confirm closure — proof it’s fixed, not assumed.
Make it continuous.
Pair this test with a program that keeps coverage live between engagements.
API Penetration Testing — questions buyers ask.
Which API types do you test?
REST, GraphQL, gRPC, and webhook-driven APIs — authenticated and unauthenticated, across web and mobile backends.
What is BOLA and why does it matter?
Broken Object-Level Authorization (BOLA/IDOR) lets one user access another’s data by changing an identifier. It is the top API risk and a primary focus of our testing.
Do you need our API documentation?
An OpenAPI/Postman spec speeds things up and improves coverage, but we can also test and map undocumented endpoints.
Prove what an attacker could actually do.
A short scoping call, no obligation.