Are You Using the Right Tools to Secure Your APIs?

Siddarth Das
Published 10/04/2022
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API Security TestingAPI security testing has become an important aspect of software assurance in recent years. It’s vital to the function of any website or application, but how does it work? Which tool is mostly used for API testing? To respond to these concerns, please read the following article. We will also explore the importance of API security testing and the benefits it offers. To conclude, we will provide some insights on how to select an API testing tool.


Understanding What API Security Testing Is

API testing is a process of ensuring that application programming interfaces are functioning as they should. This can include anything from manual to automatic testing and is often used in combination with other types of testing like functional or regression.

API testing is a crucial component of the software development process, since it aids in ensuring that APIs are functioning as intended and can withstand the load placed on them when the program is launched. It may also check for security flaws before the product is delivered.


API Security Testing: Understanding How It Works

API security testing works by verifying that the API is functioning as it should and that it is secure from potential attacks. This sort of testing can be done manually or automatically, but the most common technique is to use a mix of both.



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Manual API security testing involves an experienced tester examining the code and looking for potential vulnerabilities. This method is frequently used to supplement automated tests since it can provide a more in-depth code analysis.

Automated API security testing, on the other hand, uses tools to scan the code and look for known vulnerabilities. Not only can these tools prevent future attacks, but they can also be used to test how the system would respond in case of an emergency.


Which Tool Is Mostly Used For API Testing?

Astra’s Pentest

Several features make Astra stand out from other vendors: More than 1,025 tests, adherence to international security standards, a user-friendly dashboard with real-time vulnerability and severity assessment, security verification and simultaneous repair assistance, and recursive scans.

Key features:

  • Gap Analysis: organizations can use Astra Pentest’s gap analysis to identify security gaps in their system before choosing a particular test or evaluation.
  • Comprehensive Vulnerability Scanning: wide security scanner may find vulnerabilities based on public CVEs, the OWASP Top 10, and recent ones from Intel.
  • Regular Penetration tests: locate and repair API flaws regularly, preventing cybercriminals from taking advantage of them.
  • Re-scanning: re-evaluate API for vulnerabilities free of charge after you’ve patched the weaknesses discovered in the initial assessment. This additional scan will help ensure no new holes have opened up due to repair work.
  • Zero False Positives: Experienced professionals are used to double-check automated findings. This ensures all detected vulnerabilities are valid.
  • Intuitive Dashboard: find and fix vulnerabilities with a user-friendly dashboard, real-time vulnerability alerts, and POC videos.
  • Simultaneous Repair Assistance: Astra’s team of experts will help you repair any vulnerabilities that are found while also guiding how to prevent future attacks.

Additional API security tools for you to consider:


Karate DSL

Scenarios for API-based BDD tests have never been easier to create. Karate DSL makes it simple for users to generate step definitions without writing them down. It has also generated those definitions, allowing testers to get started with API testing right away.


Rest Assured

Rest Assured is an API tool that makes it simple to test REST resources. It’s a Java domain-specific language and an open-source tool that makes testing REST easier. Furthermore, the most up-to-date version has addressed OSGi compatibility problems. When it comes to using Apache Johnzon, it also provides greater assistance.



Postman is a platform used to build secure APIs. In addition, it provides features for pentesting APIs. These features include a user-friendly interface and the ability to integrate with other tools. Postman is available as a chrome plugin for Windows and Linux.


Benefits of API Security Testing

API security testing is an important part of the software development process because it helps ensure that APIs are functioning as intended and can withstand the load that will be placed on them when the program is launched. It may also aid in detecting possible security flaws before the product is shipped.

Some benefits of API security testing include:

  • Efficient detection of vulnerabilities: Automated tools can quickly scan code and identify potential weaknesses. This can save time and resources by allowing testers to focus their efforts on areas that are most likely to be vulnerable.
  • Improved software quality: By identifying and repairing security flaws before release, API security testing can help improve the overall quality of the software.
  • Increased customer satisfaction: By ensuring that APIs are secure and functioning properly, businesses can provide a better customer experience.
  • Reduced costs: By identifying and repairing security flaws early in the development process, businesses can avoid the costly consequences of releasing insecure software.


Challenges of API Security Testing


Data Exposure

Excessive data may be exposed to the public if end-to-end encryption is insufficient. It’s also possible that developers focus on simple protection rather than individualized filtering because they just implement generic security.


Injection Attacks

This sort of security risk is created by using harmful code in the API, which is usually in SQL or XSS format. Customers are redirected to different websites that are not secure in order for their data to be stolen. In contrast, SQL injections enable hackers to access sensitive information from the servers directly.


Broken Authentication

Broken or weak authentication allows unauthorized individuals access to certain objects. Weak passwords, API keys, and other methods may be used to gain access.



When security configurations are configured in default or left unfinished, they become vulnerable spots. Attackers may use careless mistakes to gain access to sensitive information.


Insecure Endpoints

Unsecured endpoints are a major problem for APIs since they expose them to broken authorization. This implies that even people with limited access can view other secret data.


How to Select an API Testing Tool?

Now that we’ve gone over some of the most popular API testing tools, as well as their features and benefits, you may be wondering how to select the right one for your needs. Here are a few factors to consider when making your decision:

  • The size of your team: If you have a large team, you’ll need a tool that can accommodate multiple users.
  • The language your API is written in: Some tools only work with certain languages, so be sure to choose one that is compatible with your API.
  • Your budget: There are both free and paid options available, so be sure to select one that fits within your budget.
  • Your level of expertise: If you’re new to API testing, you may want to choose a tool that is easy to use and has a good user interface.

No matter which API testing tool you ultimately decide on, the most important thing is that you invest in one that will help ensure the quality and security of your API.



API security testing is a critical part of the software development process. By investing in a quality API testing tool, businesses can ensure the quality and security of their API. While some challenges are associated with API security testing, the benefits far outweigh the risks.