API Security Testing
REST, GraphQL and internal APIs tested against the OWASP API Security Top 10 (2023).
What it is
APIs expose your core business logic directly — and broken object-level authorisation (BOLA) remains the most common API risk. We test your APIs with valid credentials and crafted requests, following the OWASP API Security Top 10 2023: broken object and function-level authorisation, broken authentication, excessive data exposure, mass assignment, injection, misconfiguration and inventory gaps.
Coverage
- REST and GraphQL endpoints
- Object and function-level authorisation (BOLA)
- Authentication, tokens and session handling
- Rate limiting and resource consumption
- Mass assignment and excessive data exposure
- Business-logic abuse and shadow APIs
How we deliver
- Scope — API inventory, documentation, keys and environments agreed in writing.
- Mapping — catalogue endpoints, roles and data classification.
- Testing — authenticated manual testing of authorisation and logic flaws.
- Validation — demonstrate real data access impact where safe.
- Reporting — risk-rated findings mapped to OWASP API categories.
- Retesting — confirm remediation.
Outcomes
- Complete API inventory validation
- Authorisation flaws with proof of impact
- Developer-ready remediation guidance
- Evidence for security reviews and auditors