High-risk API areas
Kintsubyte focuses on broken object access, role bypass, excessive data exposure, weak rate limiting, token handling, and sensitive business workflows.
API security
API Security Testing for Fintech, SaaS, and Startup Backends
Review the backend behavior that powers mobile apps, dashboards, integrations, accounts, payments, and customer data.
Share a website, API, or cloud asset you own or are authorized to test. Kintsubyte will review the public exposure and respond with next steps.
Direct answer
What is API security testing?
API security testing reviews endpoints, authentication, authorization, object access, data handling, rate limits, and business logic. It helps teams find issues that may not be visible in the user interface but can affect customer data or critical workflows.
What this covers
API Security Testing
Inputs that help
API documentation, endpoint collections, test accounts, role descriptions, and sensitive workflow notes make testing safer and more useful.
Next step
Need this reviewed for your startup?
Start with the free external security assessment, then scope the right service: vulnerability review, web or API testing, cloud assessment, remediation planning, or penetration testing when manual validation is needed.
Contact Kintsubyte
Request a free external security assessment.
Share a website, API, or cloud asset you own or are authorized to test. Kintsubyte will review the public exposure and respond with next steps.
bolarinwa@kintsubyte.comNigeria-based, remote-first across AfricaWe only test systems you own or are authorized to test