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API Security Testing
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OWASP API TOP 10 · REST · GRAPHQL

API Security Testing

Comprehensive REST, GraphQL, SOAP, and gRPC API security assessments — covering authentication bypass, mass assignment, BOLA, BFLA, injection vulnerabilities, and business logic flaws.

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OWASP
API Top 10
REST+
GraphQL/gRPC
Full
Auth Testing
Free
Retest
API Testing Methodology

How We Test Your API Attack Surface

01
API Discovery & Mapping
Enumerate all endpoints, methods, parameters, and data flows — including undocumented and legacy endpoints often missed by scanners.
02
Authentication & Authorization Testing
Test all auth mechanisms: JWT vulnerabilities, OAuth misconfigurations, API key handling, session fixation, and privilege escalation paths.
03
BOLA/BFLA Testing
Broken Object Level and Broken Function Level Authorization — the #1 and #5 OWASP API risks. We test every object reference for horizontal and vertical privilege abuse.
04
Injection & Input Validation
SQL, NoSQL, command injection, GraphQL introspection abuse, parameter pollution, and XML/JSON deserialization vulnerabilities.
05
Business Logic Testing
Rate limiting bypass, workflow manipulation, mass assignment (API3:2023), excessive data exposure, and resource exhaustion attacks.
06
Reporting & Remediation
Full API Security Report with OWASP API Top 10 mapping, CVSS scores, PoC code for every finding, and developer-friendly remediation guidance.
Deliverables

What You Receive

→OWASP API Top 10 compliance report
→Full endpoint inventory (including undocumented endpoints)
→Authentication & authorization vulnerability report
→Proof-of-concept code for all critical findings
→Developer remediation guide (code-level where applicable)
→Postman/curl reproduction steps for every finding
→Free retest after remediation
→GraphQL introspection and schema analysis (where applicable)
Engagement Types

Choose Your Scope

REST APIs

Full OWASP API Top 10 coverage — authentication, authorization, injection, and business logic.

GraphQL

Introspection abuse, query depth attacks, batch query exploitation, and field suggestion attacks.

SOAP/XML

XML injection, XXE, WSDL enumeration, and WS-Security bypass testing.

gRPC

Protocol buffer analysis, service enumeration, and authorization testing for gRPC services.

Ready to get started?
Get a free scoping call — we'll assess your needs and provide a no-obligation proposal within 24 hours.
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Request a Free Consultation

Our team will review your infrastructure and recommend the right engagement — NDA signed before any disclosure.

NDA signed before every engagement
Response within 24 hours
Free retesting on all critical findings
Request Free Security Consultation

We respond within 24 hours. NDA signed before any disclosure.

FAQ

Common Questions

Need more info? Contact our team.

Do you need API documentation to start?+
API documentation (Swagger, OpenAPI, Postman) is helpful but not required. Our team will enumerate endpoints manually and via automated discovery — often finding undocumented endpoints that your own team isn't aware of.
Do you test mobile app APIs?+
Yes — we frequently test APIs consumed by mobile applications, including analyzing traffic captured from mobile clients, testing certificate pinning bypass, and identifying mobile-specific API exposures.
How is API testing different from web app testing?+
API testing focuses specifically on the backend data and logic layer — authorization flaws, data exposure, and business logic issues that aren't visible at the frontend layer. We test both the web app and its API when both are in scope.
What's BOLA and why is it #1 on OWASP API Top 10?+
Broken Object Level Authorization (BOLA) allows attackers to access other users' data by manipulating object identifiers in API calls. It's the most prevalent API vulnerability because it requires no exploits — just valid credentials and parameter manipulation.
Also Consider

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