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API Penetration Testing

API endpoints tested for broken authorization, injection, data exposure and business-logic abuse — the flaws automated scanners miss.

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Coverage

What we test

API security assessment

A comprehensive assessment of your APIs to identify vulnerabilities and ensure secure data exchange.

  • OWASP API Security Top 10 testing
  • Authentication & authorization analysis
  • Endpoint security review
  • Input validation & data sanitisation

API penetration testing

Our ethical hackers simulate real-world attacks to test your API’s resilience.

  • Broken Object Level Authorization (BOLA) testing
  • Rate-limiting & throttling bypass
  • Injection attacks (SQL, XML, command)
  • Endpoint fuzzing & exploitation

Authentication & authorization

We test how well your API keeps unauthorised users out.

  • Token-based auth (JWT, OAuth, API keys)
  • RBAC & privilege escalation testing
  • Session management & token expiry
  • Multi-factor authentication (MFA) testing

Data security & encryption

We evaluate encryption and data handling to protect sensitive information.

  • TLS/SSL verification
  • Sensitive data exposure (PII, credentials, payment data)
  • Response tampering & replay attacks
  • Man-in-the-middle (MITM) simulation

Third-party & cloud APIs

Secure interactions with the services you integrate.

  • Dependency & supply-chain risk
  • Cloud API security (AWS, Azure, Google Cloud)
  • API gateway & proxy evaluation
  • CORS misconfiguration testing

Fuzzing & business logic

Automated and manual fuzzing with unexpected, malformed or malicious data.

  • Request manipulation
  • Logic flaws & business-logic bypass
  • Brute-force protection testing
  • Continuous monitoring recommendations
Deliverables

What you receive

Endpoint coverage mapEvery endpoint and role we tested
Technical reportFindings with severity, request/response evidence and impact
Remediation guidanceFixes mapped to your framework and gateway
RetestVerification once fixes are deployed
FAQ

Common questions

What do you need from us?
API documentation (OpenAPI/Swagger or a Postman collection) and test credentials for each role help us cover more ground in less time.
Can you test APIs behind a mobile app?
Yes. We often combine API testing with mobile app testing to follow data end to end.
Do you test in production?
We prefer a staging environment. If production is the only option, we agree safe limits in the rules of engagement.
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Web Application Penetration Testing

Identify vulnerabilities before attackers do. Real-world attacks against your websites and web apps uncover the weaknesses that matter.

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Network Penetration Testing

Strengthen your network’s defences. Simulated attacks on your infrastructure uncover weaknesses before real adversaries find them.

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Not sure where to start? Let's scope it together.

Tell us what you need to protect. We will reply within one business day with a clear scope, timeline and quote.

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