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.
