Cyber Compliance
API Application Penetration Test
API Application Penetration Test
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APIs (Application Programming Interfaces) are the connective tissue of modern applications, enabling communication between mobile apps, web platforms, cloud services, and third-party integrations. However, poorly secured APIs can expose sensitive data, functionality, or authentication mechanisms to attackers. Our API Penetration Testing Service provides a deep technical assessment of your API endpoints, helping to identify and remediate vulnerabilities before they can be exploited.
This service simulates a skilled attacker attempting to abuse your API to compromise data integrity, confidentiality, or availability. By testing both authenticated and unauthenticated access paths, we deliver actionable insight into your API's exposure and resilience against real-world threats.
The assessment includes:
Endpoint discovery and enumeration, including undocumented or hidden routes
Authentication and authorisation testing, including token analysis, privilege escalation attempts, and user context switching
Input validation and injection testing, covering SQL injection, command injection, XXE, and deserialisation vulnerabilities
Rate limiting and abuse checks, to identify denial-of-service risks or brute-force attack vectors
Transport layer and session security assessment, focusing on HTTPS enforcement, token expiration, and secure cookie flags
Business logic and workflow testing, ensuring that improper state transitions, insecure sequencing, or logic bypasses are identified
Data exposure and error handling analysis, including verbose responses, stack traces, or leaked internal references
Our testing follows OWASP API Security Top 10 and NIST 800-115 methodologies, and is suitable for RESTful, GraphQL, SOAP, and gRPC APIs.
This service is ideal for:
Organisations developing or maintaining API-driven web or mobile platforms
Businesses integrating with third-party systems, payment processors, or partner APIs
Development teams preparing to release new versions of their API into production
Companies seeking to achieve compliance with ISO 27001, PCI DSS, GDPR, and other data security standards
Each engagement includes a detailed technical report highlighting identified vulnerabilities, associated risks, proof-of-concept exploitation steps, and precise remediation recommendations. A free retest is included following the implementation of fixes to validate closure.
Strengthen Your Defenses Against Cyber Threats
Your business is constantly exposed to cyber threats, and external network vulnerabilities can be exploited by malicious hackers to gain unauthorized access to your systems. Our Penetration Testing Services identifies weaknesses before attackers do, ensuring your business remains secure and compliant.
Why Choose Our Penetration Testing Service?
We are trusted by businesses of all sizes for our highly skilled penetration testers, who hold industry-leading certifications, including:
- Cyberscheme Certified
- CREST Certified Testers
- CHECK Team Leaders in Web Apps & Infrastructure
- Offensive Security Certified Professional (OSCP)
- Offensive Security Web Expert (OSWE)
- Offensive Security Certified Expert (OSCE)
- Certified Red Team Operator (CRTO)
With these qualifications, our team delivers the highest standard of security testing, simulating real-world attack scenarios to uncover vulnerabilities before cybercriminals do.
What’s Included in Our Penetration Testing Service?
- Comprehensive Reconnaissance – We begin with an in-depth reconnaissance phase to map out your attack surface. Using a combination of open-source intelligence (OSINT) and active scanning techniques, we identify publicly exposed assets, entry points, and underlying technologies. This step provides critical insight into potential weaknesses before moving on to deeper analysis.
- Vulnerability Assessment – Once we have a complete picture of your environment, we conduct an extensive vulnerability assessment. This involves identifying misconfigurations, outdated components, security flaws, and weak authentication mechanisms. Our experts use both automated tools and manual techniques to ensure accuracy, eliminating false positives and uncovering vulnerabilities that automated scans often miss.
- Exploitation Testing – To measure the real-world impact of identified vulnerabilities, we perform controlled exploitation in a safe and responsible manner. This process simulates the tactics of real attackers, including attempts to bypass authentication, escalate privileges, exploit misconfigurations, and gain unauthorized access. Every test is conducted carefully to avoid service disruptions while demonstrating the true risk of potential breaches.
- Post-Exploitation Analysis – If a vulnerability is successfully exploited, we assess how far an attacker could move within the system, what data could be accessed, and whether additional security controls prevent lateral movement. This phase highlights the full impact of a potential breach and provides insight into necessary security improvements.
- Detailed Reporting & Remediation Guidance – At the conclusion of the test, we provide a comprehensive report detailing all findings, including vulnerability descriptions, proof-of-concept exploitation, risk ratings, and clear remediation steps. Our actionable recommendations help you strengthen your defenses and prevent future attacks. We also offer post-assessment consultations to support your team in addressing any security gaps effectively.
Why Act Now?
Cyber threats are evolving daily, with attackers continuously searching for vulnerabilities to exploit. Businesses face increasing risks from cybercriminals using sophisticated tactics to breach systems, steal sensitive data, and disrupt operations. Whether you operate an external network, web application, or mobile platform, security weaknesses can be exploited if left undetected.
Our penetration testing service provides a proactive approach to security, helping you stay ahead of cyber threats before they become costly breaches. By simulating real-world attack scenarios, we uncover vulnerabilities that could be exploited by malicious actors and provide clear, actionable remediation guidance to eliminate these risks.
Beyond protecting your business from potential attacks, our penetration testing services help you meet industry compliance requirements, including Cyber Essentials, Cyber Essentials Plus, ISO 27001, PCI-DSS, and other regulatory frameworks. Compliance alone is not enough—understanding and mitigating security gaps ensures that your business remains resilient against evolving threats.
With a team of highly certified security professionals, including Cyberscheme-certified testers, CREST-certified experts, and CHECK Team Leaders specializing in web applications and infrastructure, we deliver in-depth, methodical penetration testing tailored to your unique security needs. Our assessments go beyond automated scans, utilizing manual testing techniques to identify complex vulnerabilities that standard security tools often overlook.
Investing in penetration testing is not just about securing your systems—it’s about ensuring the trust of your customers, protecting sensitive data, and safeguarding your reputation. Whether you need to assess an external network, internal network, API, a critical web application, or a mobile platform, our expert security team is ready to help you strengthen your defenses and reduce your exposure to cyber threats.
Questions?
Please feel free to email any questions to us at info@cybercompliance.org.uk or via the Live Chat.