API Security Testing & Penetration Testing | OWASP API Top 10
Your API may be exposing sensitive data—even when your frontend looks perfectly secure.
A single authorization flaw can allow an attacker to access another user's data, bypass restricted functionality, or abuse sensitive API endpoints.
I help businesses identify these weaknesses through manual API security testing, real-world attack scenario validation, and risk-focused penetration testing—before they become costly security incidents.
🔍 What I Can Test
Broken Access Control: BOLA/IDOR, BFLA, privilege escalation, and unauthorized data access.
Authentication & Session Security: JWT weaknesses, OAuth implementation flaws, token validation, and authentication bypass.
Injection Vulnerabilities: SQL injection, NoSQL injection, and command injection.
Business Logic Flaws: Workflow bypasses, parameter tampering, mass assignment, and unauthorized operations.
API Abuse & Resource Security: Rate-limit weaknesses, unrestricted resource consumption, and brute-force exposure.
SSRF & API Configuration: Server-side request forgery, security misconfigurations, and improper API asset management.
REST & GraphQL Security: Endpoint authorization, sensitive data exposure, and access-control weaknesses.
Testing is aligned with the OWASP API Security Top 10, with checks tailored to your API's architecture, functionality, and authorized scope.
📄 What You'll Receive
A professional penetration testing report in PDF format.
An executive summary explaining the most important risks in plain language.
Validated findings with severity ratings and business impact.
Reproducible proof of concept (PoC), including request/response evidence and screenshots where appropriate.
Clear, actionable remediation recommendations.
A retest of reported findings if included in the agreed scope.
🛠️ My Testing Approach
I use Burp Suite Professional, Postman, OWASP ZAP, and custom scripts where appropriate. Automated tools can help identify potential issues, but manual verification is essential to distinguish genuine vulnerabilities from false positives.
My focus is on evidence-backed findings, practical security improvements, and clear communication—not simply generating scanner output.
📩 Before We Begin
Please contact me before placing an order so we can confirm:
API type: REST, GraphQL, or SOAP.
Authorized targets and testing scope.
Available Swagger/OpenAPI documentation or Postman collections.
Testing requirements, timeline, and deliverables.
Important: Testing is performed only against systems you own or are explicitly authorized to assess. No destructive testing or out-of-scope activity will be performed without prior written approval.
