API Penetration Testing
Secure your REST, GraphQL, and SOAP APIs
What this engagement covers
The service
Modern applications rely heavily on APIs, making them critical attack vectors. Our API penetration testing service identifies authentication flaws, authorization bypasses, injection vulnerabilities, and business logic issues specific to API implementations.
What we test
We test REST APIs, GraphQL endpoints, SOAP services, microservices architectures, and third-party API integrations. Our assessment covers authentication mechanisms (OAuth, JWT, API keys), rate limiting, input validation, error handling, and API-specific vulnerabilities that traditional web testing misses.
How we run it
Using specialized API testing tools and custom scripts, we map your API surface, analyze authentication flows, test authorization boundaries, and identify data exposure risks. We test for OWASP API Security Top 10 vulnerabilities and examine your API documentation for security gaps.
API discovery and endpoint mapping
Authentication mechanism analysis
Authorization and access control testing
Input validation and injection testing
Rate limiting and abuse testing
Mass assignment and excessive data exposure
Business logic and workflow exploitation
API versioning security review
What you receive
Findings land in your tracker as you go, not only in a PDF at the end. Retest is in scope, not a change order.
- Complete API security assessment report
- Authentication and authorization vulnerability analysis
- Business logic flaw documentation
- Rate limiting and abuse scenario testing results
- Data exposure and excessive data return findings
- API specification security review
- Automated security test suite for CI/CD
- Developer remediation workshop (optional)
What we usually find
The issues this engagement surfaces most often. Yours will differ, but this is the shape of it.
Who this is for
Findings are mapped to OWASP API Top 10, PCI-DSS, GDPR, SOC 2, HIPAA, so the report drops into an audit package rather than needing to be translated first. If you need the readiness work behind one of those, that is a separate engagement.
Scope it in one call
Tell us what is in scope and we come back with a fixed price and a start date. No discovery-call maze, no hourly estimate that moves.
