API Security
We test the APIs that connect your applications, partners and mobile clients, finding the authorisation, logic and exposure flaws that let attackers reach your data directly, then help your team lock them down.
We test the endpoints that expose your data
APIs carry the traffic between your systems, your apps and the outside world, which makes them a direct route to your data. We test each endpoint against the OWASP API Security Top 10 and beyond, focusing on the authorisation and logic flaws that scanners rarely find.
Broken Object Authorisation
Endpoints that let one user request another user’s records simply by changing an ID.
Broken Authentication
Weak tokens, flawed login flows and poor session handling that let attackers impersonate users.
Function-Level Access
Missing checks that let ordinary users reach admin actions and privileged endpoints.
Business Logic Abuse
Flaws in workflows, rate limits and process order that let requests be replayed or gamed.
Excessive Data Exposure
Responses that return far more data than the client needs, leaking sensitive fields.
Injection & Input Flaws
Unvalidated parameters that allow injection, mass assignment and unexpected server behaviour.
Your APIs Are A Direct Line To Your Data. We Make Sure Only The Right People Get Through.
APIs now run the connections between your services, your mobile apps and the partners you work with. That reach is exactly what makes them a target. Many of the worst breaches start not with a broken firewall but with an endpoint that trusts the wrong request, hands back too much data or forgets to check who is asking. These flaws rarely show up in a scan.
We test your APIs by hand as well as with tooling, mapping every endpoint and working through the authorisation, logic and exposure issues that matter. We cover REST and GraphQL, authenticated and anonymous access, and the trust between services. You get clear findings tied to real request examples, prioritised fixes and a retest once your team has made the changes.
Standards and Frameworks We Test Against
- Every engagement is aligned to the OWASP API Security Top 10 (2023) and the OWASP Application Security Verification Standard (ASVS) for consistent, thorough coverage.
- We follow the OWASP testing guidelines and PTES methodology, examining authentication, authorisation, rate limiting and data handling across every endpoint.
- Where your APIs move payment or personal data, we relate findings to the standards you answer to, such as PCI DSS, so remediation also supports audit readiness.
Aligned to the frameworks that matter
Our testing follows the methodologies that set the global standard for application security.