API Penetration Testing Services

API Penetration Testing Services

Your APIs Are the Backbone of Your Business, Secure Them Accordingly

APIs power the integrations, services, and data flows that modern businesses depend on and they're an increasingly attractive target for attackers. Broken authorisation, excessive data exposure, and weak authentication in APIs have been behind some of the most significant breaches in recent years.

Our API security testing applies the OWASP API Top 10 framework alongside deep manual testing to identify the vulnerabilities that automated tools and standard web application testing regularly overlook.

The Process

Structured, Collaborative, and Focused on Your Outcomes

API security testing requires careful coordination between your development, security, and architecture teams. Our methodology ensures that coordination happens smoothly — with clear communication at every stage, a scoping process that captures the full complexity of your API landscape, and a reporting and post-test engagement designed to make remediation as straightforward as possible.

We don't simply hand over a findings report and disappear. We stay engaged throughout the process, from the first conversation to the final retest, to ensure that every vulnerability we identify is understood, prioritised, and resolved.

Why test your APIs?

APIs Connect Everything. Make Sure They're Secure.

APIs are the invisible backbone of modern business connecting your applications, your partners, and your data. But they're also one of the most commonly exploited attack vectors in use today. A poorly secured API can expose sensitive data, allow unauthorised access, or enable attackers to manipulate business processes entirely undetected.

Our API security testing gives you the assurance that your interfaces are as secure as they need to be, without disrupting the services your business depends on.

Why Us

API Testing That Reflects How Attackers Really Work

API security is a specialist discipline. Unlike traditional application testing, assessing APIs effectively requires a deep understanding of authentication patterns, data flows, and the specific ways that business logic can be abused when exposed through an interface.Our consultants are experienced in testing APIs across a wide range of styles, frameworks, and industries.

We go beyond simply checking that endpoints respond as documented, we test how they behave under unexpected conditions, how they handle authentication edge cases, and whether the business logic they expose can be manipulated in ways that documentation doesn't anticipate.We work closely with your development and architecture teams throughout the process, ensuring that findings are understood in context and that remediation guidance is practical and implementable.

Our reports are structured to serve both technical and non-technical audiences, with clear risk ratings and business impact statements that give leadership the visibility they need.When testing is complete, we support your remediation effort and retest to confirm that fixes have been correctly applied, giving you the documented evidence of assurance that auditors and compliance teams require.