API PENETRATION TESTING
API penetration testing for the APIs your business runs on
We test how attackers abuse your APIs to reach data they should never see.
REST, GraphQL, SOAPOWASP API Top 10Free re-test
What is API penetration testing?
API penetration testing is a manual security test of your application programming interfaces. Testers check authentication, authorisation, input handling and data exposure across REST, GraphQL or SOAP endpoints, and try to access other users' data or functions, mapped to the OWASP API Security Top 10.
APIs expose data directly.
One missing access check can leak every customer record. We test each endpoint the way an attacker would.
What we cover
Broken object level authorisation (BOLA)
Authentication and token handling
Excessive data exposure
Rate limiting and resource abuse
Injection and mass assignment
How it works
01
Scope
Collect API docs, roles and test accounts.
02
Map
Discover every endpoint and parameter.
03
Test
Manual attacks per role and object.
04
Report
Findings with proof and fixes on Penarc.
05
Re-test
Verify fixes.
What you get
✓
Report mapped to OWASP API Top 10✓
Proof of concept for each finding✓
Developer fix guidance✓
Re-test reportWho needs it?
✓
Fintech and payment APIs
✓
SaaS platforms with public APIs
✓
Mobile apps backed by APIs
✓
Teams exposing APIs to partners
Why HostX
Manual testing
Logic flaws scanners miss.
Role-by-role
Every user type tested.
Clear fixes
Ready for your developers.
Related services
Frequently asked questions
API documentation such as Swagger/OpenAPI or a Postman collection, plus test accounts for each user role.