API Penetration Testing
PENTRA enables structured API penetration testing for REST, SOAP, and GraphQL APIs against the OWASP API Security — with engineer-validated findings, proof of execution per test case, and on-demand reporting at any stage of the engagement.
PENTRA can be used by internal security teams as a platform or delivered as a fully managed service by Reacts — using the same structured methodology, technique library, and evidence-based execution model.
APIs Are Among the Most Under-Tested Attack Surfaces in the Enterprise
API penetration testing evaluates interfaces for authentication, authorization, and data exposure weaknesses.
APIs expose business logic directly. They handle authentication, authorization, and sensitive data transfers — often with fewer security controls than the web interfaces built on top of them. PENTRA identifies what is actually exploitable in your API layer — authorization flaws, authentication bypasses, data exposure, and business logic vulnerabilities that scanners do not reach.
PENTRA executes each OWASP API Security test case individually, under engineer control. Every finding is validated, evidenced, and recorded before the test case is marked complete.
Testing Methodology
PENTRA API assessments follow a structured methodology aligned with the OWASP API Security.
| Phase | Activities |
|---|---|
| Discovery & Documentation | Identify all API endpoints — including undocumented and shadow APIs · Map authentication and authorization mechanisms · Document API data flows and dependencies |
| Authentication Testing | Test JWT implementations, OAuth configurations, and API key management · Identify token validation weaknesses and authentication bypass paths |
| Authorization Testing | Evaluate object-level authorization (BOLA/IDOR), function-level authorization, and role-based access control implementation |
| Business Logic Testing | Test rate limiting enforcement, workflow integrity, and process bypass vulnerabilities |
| Input Validation & Injection | Test for injection vulnerabilities, mass assignment, and improper input handling across all identified endpoints |
How PENTRA Structures This Engagement
This capability is delivered through the PENTRA platform using structured technique execution, human validation, and evidence-based reporting.
Learn how this capability fits into the full PENTRA platform →
Complete OWASP API Security test case library — every test case tracked and executed individually.
Engineer validates exploitability per test case before recording finding — no automated pass/fail.
Screenshot evidence per test case — stored securely and embedded in reports.
100% scope coverage enforced before engagement close.
Structured identification of undocumented and shadow API endpoints — included as part of the assessment scope.
On-demand API pentest PDF report with preview mode — generated at any engagement stage.
PT++: API Assessment with SOC Detection Validation
PT++ API engagements pair structured API penetration testing with simultaneous Blue Team detection validation. As the engineer executes OWASP API test cases, the Blue Team Portal streams live execution data to your SOC — who mark detection per test case and receive a measured Detection Rate across all tested API categories. Particularly valuable for assessing API gateway monitoring, SIEM rule coverage for API abuse patterns, and SOC responsiveness to API-layer attacks.
| Capability | Description | Tags |
|---|---|---|
| Shadow API Discovery | Structured identification of undocumented, legacy, and shadow API endpoints not included in official API specifications. | Endpoint Discovery · Shadow API |
| Authentication Mechanism Testing | Structured testing of JWT vulnerabilities (algorithm confusion, weak signing), OAuth misconfiguration, and API key management weaknesses. | JWT Security · OAuth Testing |
| Business Logic Assessment | Structured testing of rate limiting, workflow enforcement, privilege escalation paths, and business process bypass. | Logic Flaws · Workflow Security |
| Data Exposure Testing | Structured validation of object-level and function-level authorization, mass assignment vulnerabilities, and sensitive data exposure. | BOLA · Mass Assignment · Data Exposure |
| SOC Detection Validation (PT++ component) | Live Blue Team Portal feed of executed API test cases · Manual detection marking · Detection Rate per OWASP API category | SOC Integration · Detection Measurement |
| Metric | What It Reflects |
|---|---|
| OWASP API Coverage | 100% of in-scope test cases executed and validated |
| Proof of Execution | Evidence (pass/fail screenshot) for every test case |
| Detection Rate (PT++ only) | Percentage of API test cases detected by the Blue Team — computed per OWASP API category |
What You Receive
| Deliverable | Description |
|---|---|
| Executive Summary | Security Score, severity distribution, and key API findings for CISO and CTO audiences. |
| Technical Report | All findings mapped to OWASP API Security · Evidence per finding · Attack scenario walk-through · Authentication and authorization vulnerability analysis · Remediation guidance |
| Delivery Discussion | Walkthrough of critical API findings with the Reacts engineering team. |
Prefer a Fully Managed Engagement?
Reacts delivers this capability as a managed service — executed by certified engineers and powered by the PENTRA platform.
Request a Managed Assessment