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Salus Cyber

Application Testing

API Testing

Evaluate your API's security posture.

Discover and address potential security weaknesses in your API with our expert penetration testing services, ensuring your API is both secure and functional.

Testing APIs for security issues is a critical step in ensuring the security of any application that relies on them. The process of testing APIs for security issues can be broken down into several steps, including:


  • Discovery: Once the APIs to be tested have been identified, it is important to understand their functionality. This includes understanding how the APIs are used, what data they process, and what security measures are in place to protect them.


  • Access Control: Salus Cyber consultants will identify security boundaries and privilege restrictions in the API by assessing functionality and asking questions to the client. API functionality will be tested from the perspective of all privilege levels available, trying to find gaps in privilege restrictions that could allow a user to see the data of other users or conduct API calls meant to require higher privilege.


  • Fuzzing: The next step is to identify potential security vulnerabilities in the APIs. This can be done by systematically introducing unexpected input into the API and observing the output for indications of security vulnerabilities.


  • Exploitation: Once potential security vulnerabilities have been identified, it is important to test the APIs to see if they can be exploited. This can be done by using tools such as penetration testing, vulnerability scanning, and fuzz testing.


  • Workflow subversion: by using the information gathered in the analysis phase, the consultants will attempt to exploit weaknesses in the privileges granted to each user and the flow of application logic, allowing an attacker to exploit weaknesses in the API.


Throughout the testing process, it is important to ensure that all technical aspects of the APIs are fully discussed. This includes understanding the APIs' architecture, protocols, authentication mechanisms, and data formats, as well as any other technical details that may impact their security. By fully understanding the technical aspects of the APIs, testers can more effectively identify potential security vulnerabilities and ensure that the APIs are secure and reliable.

First Line Dark


Our experienced team of CREST and CyberScheme certified consultants, with knowledge across all cybersecurity domains, can provide comprehensive penetration testing of your APIs to identify any vulnerabilities and ensure that they are secure from potential cyber threats.


Our focus on custom objectives and continual feedback on deliverables ensures that our penetration testing services are tailored to your specific needs and provide clear, concise remediation advice, allowing you to confidently secure your APIs and protect your business from potential cyber-attacks.


By conducting regular penetration testing against APIs in development, you are able to assure the project that the development approaches are consistent with good security practices. This is especially important when the speed of development in agile environments is high, which potentially leads to a lack of priority on security in the environment.


Extensive testing of APIs uncovers hidden vulnerabilities and coding flaws in modern web applications, enhancing overall security and preventing potential exploits. It also identifies misconfigurations and weaknesses in security controls, enabling timely remediation.

How we work

Customer Journey

  1. Identify

    First, we take time to familiarise ourselves with your business. This allows us to clearly understand your requirements, your business risks, your key pain-points, and the outcomes you’re looking for.

  2. Understand

    We turn those requirements into crystal-clear scoping and test plan documents, so you know precisely what we’ll be doing, when we will be doing it, and how we will do it.

  3. Test

    We deliver what we promised.

  4. Inform

    Every report we create is unique based on your business, we don’t use cookie cutter data for our summaries or our remediation plans. Our precise and concise findings brief will advise what steps your business needs to take next to reduce cyber risk.

  5. Remediate

    We can ensure that the remediation process is tracked and coordinated within your business, we will allocate resources to point you in the right directions or if you need our help directly with remediation, we’ve got you covered.

  6. Feedback

    Your opinion is important to us, so we send a questionnaire to every one of our customers after each project – so you can let us know how we did.

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