API Penetration Testing

API Penetration Testing is a controlled security assessment of API endpoints, authentication, authorisation, parameters,headers, tokens and business workflows to identify vulnerabilities that could expose data or functionality.

Blacklock can test REST APIs, web services, mobile app APIs, internal APIs, public APIs and APIs documented through Swagger, Open API or Postman collections.

Testing covers broken object level authorisation,broken function level authorisation, authentication bypass, privilege escalation, excessive data exposure, injection, parameter manipulation, ratelimiting weaknesses and business logic flaws.

Blacklock uses both automated scanning and manual penetration testing. Automated results are manually reviewed and validated,while complex API workflows are tested manually from an attacker’s perspective.

Access may include API documentation, Swagger or Open API files, Postman collections, test credentials, user roles, API keys, tokens, test data and architecture information.

Yes. Blacklock can test authenticated APIs across multiple user roles to identify authorisation weaknesses, privilege escalation and access control issues.

Yes. API endpoints used by mobile applications can betested as part of API or mobile application penetration testing, depending on the agreed scope.

The duration depends on the number of endpoints, userroles, authentication flows, business workflows and testing depth. A standard API assessment typically takes several days to two weeks.