API Security Testing
Authorization, injection, and abuse-case testing tailored to REST and GraphQL APIs, including broken object-level authorization and excessive data exposure.
Understanding This Service
What It Is
A focused security assessment of your REST or GraphQL APIs, testing authentication, authorization, input handling, and business logic the way an attacker with access to your endpoints would.
Who It's For
Engineering teams shipping public or partner-facing APIs, SaaS platforms with token-based access, and organizations exposing mobile or third-party integrations through programmatic interfaces.
When It's Needed
Before opening an API to external partners, after introducing new endpoints or auth flows, or as part of a broader application security program.
Why Clients Request This Service
Broken Object-Level Authorization
Weak Authentication Flows
Excessive Data Exposure
Undocumented or Shadow Endpoints
Scope of Testing
Scope is tailored per engagement, but most API assessments draw from the following.
Authentication Testing
Token handling, session management, and credential-based attack paths.
Authorization Testing
Object- and function-level access control checks across user roles.
Injection & Input Handling
SQL, NoSQL, command, and GraphQL-specific injection vectors.
Business Logic Abuse
Rate limiting, workflow bypass, and abuse-case scenarios specific to your API.
Reporting
Detailed findings with risk ratings, evidence, and remediation guidance.
How We Run This Engagement
Planning
API documentation review, scope definition, and authorization sign-off.
Testing
Manual exploitation of authentication, authorization, and logic flaws.
Validation
Confirming exploitability and ruling out false positives.
Reporting
Executive and technical findings delivered with clear risk ratings.
Remediation Review
Retesting fixed issues to confirm they're fully resolved.
What You Walk Away With
Executive Summary
A board-ready overview of API risk posture and key findings.
Technical Findings
Detailed, reproducible findings for your engineering team.
Risk Ratings
CVSS-aligned severity scoring to help you prioritize fixes.
Proof of Concept
Evidence and request/response examples for each validated finding.
Remediation Guidance
Specific, actionable fixes mapped to your API's architecture.
Retest Validation
Confirmation testing once fixes are deployed, included at no extra cost.
This service commonly supports requirements under:
What Makes Our Testing Different
Questions About API Security Testing
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