Identify API Blind Spots Before Attackers See Them
API penetration test is a crucial security exercise that goes beyond automated scanning to thoroughly examine the application programming interfaces underpinning your digital services.
At CypherLeap, our testing team meticulously enumerates your APIs for exploitable flaws, looking for weaknesses like improper authentication, insecure data exposure, and broken authorisation. The goal of this assessment is to identify API blind spots before attackers see them, providing your business with actionable insights to patch these vulnerabilities and secure the critical data flows powering your modern applications.
Our Offensive Security Services team conducts testing following test cases derived from the OWASP API Security Top 10, focusing on common API-specific risks.
Methodologies
Assessment may be conducted using either a Black-Box approach, or Grey-Box approach
- Black-Box Assessment
- Grey-Box Assessment
Assessment in which the testing team will have no prior knowledge about the targeted environment, systems and endpoints.
Assessment in which the testing team will have very limited knowledge about the targeted environment, systems, endpoints, and may require walkthrough or guidance from one of your technical team.
- Authenticated
- Un-Authenticated
CypherLeap may request access to targeted user roles within the organisation to identify vulnerabilities from an authenticated user’s point of view. This allows your business to better understand associated risks and identify potential privilege escalation pathways.
The unauthenticated testing approach provides your business with visibility into what a potential threat actor could access and/or compromise with only access to the agreed testing scope.
Why Choose Us
- Methodologies aligned with OWASP API Top 10 & industry frameworks
- Manual deep-dive testing that goes far beyond basic scanners
- Realistic attacker simulation using Black-Box, Grey-Box, Auth/Unauth access
- Risk-prioritised, developer-friendly reports
Bridging the Gap Between Development Speed and Security
In today’s agile environments, APIs evolve rapidly often faster than security controls can keep up. Our API Penetration Testing helps your business:
• Identify security blind spots early in the development lifecycle
• Reduce risk exposure across third-party integrations and data endpoints
• Meet compliance requirements (PCI-DSS, GDPR, HIPAA, etc.)
• Build customer trust through proactive security validation
Frequently Asked Questions
What types of APIs do you test?
We assess REST, SOAP, GraphQL, and other web services. Whether internal, third-party integrated, or public-facing, we adapt our methodology to suit your API architecture.
How does this differ from a Web Application Penetration Test?
Web App testing focuses on browser-based interactions, while API testing dives into backend endpoints that power apps, mobile clients, and microservices often bypassing traditional security controls.
How often should API testing be done?
At minimum, annually or after significant changes like version updates, new endpoints, or third-party integration changes.
