API Penetration Testing
Every API endpoint, exploited not just flagged
Human-led, AI-accelerated penetration testing for your REST, GraphQL, and gRPC APIs, with every finding proven by a working exploit and signed off by a certified tester.
Your API is where the real business logic and the real data live, and it is the part attackers reach first. We test authentication, object- and function-level access control, and the logic behind every endpoint the way a determined adversary would, then hand your team an exploit for each issue we find. Fixed price, fixed timeline, and a free retest once you ship the fixes.
What we test
Where we focus.
Broken Object Level Authorization (BOLA/IDOR)
Swapping IDs, UUIDs, and tokens across accounts to read or change data that is not yours.
Broken Function Level Authorization (BFLA)
Reaching admin-only and privileged operations by calling them directly and forging roles.
Broken authentication and token handling
JWT algorithm and signature abuse, weak session/API keys, OAuth flow flaws, and login rate-limiting.
Mass assignment and excessive data exposure
Injecting hidden fields to escalate privilege, and endpoints that leak more than the client should see.
Injection and server-side request forgery
SQL/NoSQL/command injection and SSRF that pivots into internal services and cloud metadata.
GraphQL introspection and abuse
Schema harvesting, deeply nested query DoS, batching attacks, and resolver-level authorization gaps.
Rate limiting and resource consumption
Enumeration, credential stuffing, and unthrottled endpoints that enable abuse and denial of service.
Business logic and workflow abuse
Race conditions, replay, negative quantities, and sequence bypasses that scanners never catch.
How it works
From scope to retest.
Scope on a short call
We map your endpoints from OpenAPI/Swagger, GraphQL schema, or Postman collections, confirm roles and environments, and lock a fixed price and timeline before any testing starts.
Test like an attacker
Certified testers work every endpoint and role by hand, backed by our AI engine for breadth, chaining auth, access-control, injection, and logic flaws into real, provable attack paths.
Report with proof
Each finding ships with a working proof-of-concept, exact reproduction steps, severity, remediation, and a mapping to OWASP API Top 10 and your SOC 2, ISO 27001, PCI DSS, or HIPAA controls.
Retest for free
Once your team fixes the findings, we re-exploit each one to confirm it is closed and issue an updated, auditor-ready attestation, at no extra cost.
What you get
In your report.
- ✓Exploit-backed findings report mapped to the OWASP API Security Top 10
- ✓Working proof-of-concept and step-by-step reproduction for every vulnerability
- ✓Severity ratings with business impact and prioritized, developer-ready remediation
- ✓Compliance mapping and an attestation letter for SOC 2, ISO 27001, PCI DSS, or HIPAA
- ✓Free retest and updated report after your fixes ship
Questions
Answers, up front.
Do you test REST, GraphQL, and gRPC APIs?
Yes. We cover REST and JSON APIs, GraphQL (introspection, nested-query DoS, batching, resolver authorization), and gRPC/protobuf services, testing authentication, access control, and business logic on each.
What do you need from us to start?
Access to a staging or production-like environment, an OpenAPI/Swagger spec, GraphQL schema, or Postman collection, and test accounts for each user role. We finalize scope, price, and timeline on one short call.
How is this different from an automated API scanner?
Scanners flag patterns; we prove exploitation. Certified testers chain BOLA, auth bypass, and logic flaws into real attacks a tool cannot find, and a human validates and signs off on every finding, so you get near-zero false positives.
Ready to put it to the test?
Scope your apis engagement on a short call. Fixed price, fixed timeline, and an auditor-ready report in days.
Book a scoping call →