API Security Testing
APIs now carry the majority of application traffic — and the majority of application breaches. Broken object-level authorization, the most common API flaw, lets attackers read other users’ data by simply changing an ID. No scanner reliably catches it.
We test REST and GraphQL APIs against the OWASP API Security Top 10 with heavy focus on authorization logic, the class of vulnerability automated tools miss most. Every endpoint, every role, every object type.
What We Test
Our Approach
- 01
Ingest API documentation, specs, and collections (OpenAPI, Postman)
- 02
Map every endpoint and role combination
- 03
Systematically test authorization across all object references
- 04
Report with per-endpoint findings and fix patterns
What You Receive
Covers API testing expectations under PCI DSS, SOC 2, HIPAA, and partner security assessments.
Frequently Asked Questions
We already scan our APIs. Why do we need manual testing?
Scanners cannot know that user A should not see user B’s invoice — authorization is business logic, and it is the number one source of API breaches. Manual testers build a permission model of your API and systematically break it.
Can you test GraphQL APIs?
Yes. GraphQL introduces its own attack surface — introspection leaks, query depth attacks, batching abuse, and field-level authorization gaps — and we test all of it alongside the standard OWASP API Top 10.
What do you need from us to start?
API documentation (OpenAPI spec or Postman collection), test accounts for each role, and a target environment. With those in hand most API engagements start within a week.
Related Services
Ready to get started?
Tell us about your environment and timeline. We respond within one business day with scoping questions and a clear quote.
Request a Quote