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Zhanna Pelenska

QA, Manager

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Alexandra Nagy

QA Lead

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API Testing Services

We'll guide you through the key processes of API testing and show you how to implement software API testing in your company to enhance the development process and ensure product quality.

What Is API?

An application programming interface is a list of protocols, rules, and definitions developers use to create and integrate application software into existing systems and platforms. An API is a boundary between objects that interact. Developers use the interface by sending a request and receiving a response. We offer high-quality API testing services to ensure the reliability and security of your software. Our professional testers are skilled in API testing. We are ready to build a software API testing system on your project to ensure your application is reliable and stable.

What Is API Testing?

API testing is a process in which test requests are sent to a server, and the system responses are analyzed.
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API testing to smooth the development workflow

API testing allows us to test new features from the backend developers even before the UI is ready. Thus, API testing helps to identify and correct errors on the backend without the need to correct the consequences of these errors on the front end.
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Achieve Software Reliability & Security With API Testing

Our Approach

We perform API testing services on different devices, operating systems, and browsers. If any errors do happen, that might cause the program hacking. APIs are often complex, with many different parameters, endpoints, and possible responses that require special skills for testing. Luxe Quality helps companies build high-quality products by ensuring integrated APIs meet application functionality, reliability, performance, and security standards.
  • Usually, to check data accuracy, schema, data type, order, completeness, HTTP status codes, and error codes should be verified.
  • This helps to identify and correct possible errors before operating the product.
  • API software testing also aids in ensuring software security, allowing you to identify and fix potential errors while exchanging data between different system component.
  • This may include input validation, SQL injection protection, access rights checking, API security techniques, etc.
  • API testing services based on testing types

    We can offer a review of different types of API software testing to help you get more information and better understand how to test API effectively.

    API Performance Testing

    API performance testing, a core aspect of our API testing service, assesses the performance and consistency of an API under normal and high-load conditions, measuring its stability and speed through simulations. We use tools like Gatling, Jmeter, and K6 for this type of testing.

    API Security Testing

    Testers use API security testing methods to prevent potential attacks and malicious actions. QA performs unauthorized access to the server to ensure the protection of user information. For automation API testing, testers use tools such as Burp Suite, Acunetix, and Restler-Fuzzer.

    API Integration Testing

    API integration testing studies the relationship between different system modules. Productivity and the provision of quality services directly depend on effective integration. We use such tools as Postman, Runscope, Checkly, Karate, and others to implement these tasks.

    API Automation Testing

    In automated API testing, we use test scripts to check the reliability and high functionality of the API application in the project. This type helps to significantly speed up the search for errors and improve the quality of the final product. Popular automated API testing tools include Postman, SoapUI, and Rest-Assured.

    API Manual Testing

    Manual API testing is a process in which requests are sent manually by QA engineers, not scripts. Skilled testers write queries, integrate and test the API, and make necessary changes to address flaws.

    API Testing Benefits

    The benefits of API testing include identifying and rectifying interface errors that can adversely impact user experience and interactions with applications and services. Therefore, the following main advantages of using the software testing API should be listed.
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    Strong Protection

    It is vital to provide accurate data transfer in the appropriate format when interacting with external services through API. API testing ensures uninterrupted data communication, detects errors and enhances data security.
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    Core Access

    A convenient and exciting feature for API developers and testers is that API software testing allows access to the application without a user interface. That is, a permit is obtained from the kernel. This helps to save time as testing can be done simultaneously with development.
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    Time & Cost Effective

    API testing saves developers time since testing can be started before the UI is implemented. It not only speeds up development workflows but also allows you to avoid future errors, significantly reducing development costs.

    API Testing Tools

    In our work, we use a comprehensive set of tools for API testing because each provides a range of capabilities necessary for testers.
    • Postman icon

      Postman

    • SoapUI icon

      SoapUI

    • Runscope icon

      Runscope

    • Jmeter icon

      Jmeter

    • Checkly icon

      Checkly

    • BurpSuite icon

      BurpSuite

    API Automation testing frameworks

    Frameworks are used during many development and testing stages because they significantly speed up and help the developer or tester. When it comes to automation API testing, there are numerous frameworks available, such as: Supertest, Testcafe, Pact, Playwright, Rest-assured, Karate, and Cypress, among others.
    • SuperTest icon

      SuperTest

    • TestCafe icon

      TestCafe

    • Pact icon

      Pact

    • Playwright icon

      Playwright

    • Rest-Assured icon

      Rest-Assured

    • Karate icon

      Karate

    • Cypress icon

      Cypress

    Case Studies

    MORE PROJECTS
    E-Commerce

    Distflow

    Photo Distflow site

    MORE ABOUT PROJECT

    E-Commerce

    Distflow

    USA

    Web

    Implementation time:

    May 2022 - Nov 2022

    About project:

    Distflow is a web design and development company based in New York. They develop and design websites from scratch.

    Services:

    Manual Usability, Exploratory testing, Automation Functional Responsive testing  

    Result:

    450 bug reports were created. 25+ test cases were automated, which increased the efficiency of testing.

    FULL CASE STUDY

    Fintech
    Insurance

    CptoX

    Photo CptoX site

    MORE ABOUT PROJECT

    Fintech
    Insurance

    CptoX

    USA 

    Mobile 

    Implementation time:

    Oct 2023 – present

    About project:

    CptoX offers personalized insurance plans and easy digital management, supported by 24/7 expert help.

    Services:

    Manual, Automation, Functional, Unit, Integration, Security, E2E testing;

    Automated testing - Java + JUnit.

    Result:

    130 test cases were successfully automated. This indicates a high level of automation, which helps ensure the product's stability and reliability.

    FULL CASE STUDY

    E-Commerce

    Tempus WhatIf

    Photo Tempus WhatIf site

    MORE ABOUT PROJECT

    E-Commerce

    Tempus WhatIf

    Netherlands

    Web 

    Implementation time:

    Dec 2022 – Apr 2023

    About project:

    Tempus WhatIf is a full-cycle digital agency with offices in the Netherlands, Spain, and Eastern Europe. Their team has been in advanced e-commerce solutions for nearly 25 years.

    Services:

    Manual Functional, Regression, Smoke, Cross-Platform, Usability testing

    Result:

    110 test cases were written. The testing process identified and reported 20 bugs that were addressed and fixed.

    FULL CASE STUDY

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    Our workflow

    01
    Now: Just fill out our quick form with your project details. It’s easy and only takes a minute.
    02
    In a Few Hours: We’ll assess your information and quickly assign a dedicated team member to follow up, no matter where you are. We work across time zones to ensure prompt service.
    03
    In 1 Day: Schedule a detailed discussion to explore how our services can be tailored to fit your unique needs.
    04
    Following Days: Expect exceptional support as our skilled QA team gets involved, bringing precision and quality control to your project right from the start.

    FAQ

    Automated testing should be used for powerful APIs that are too complex for manual testing.
    Any automated testing is sensitive to hardware (RAM, CPU), test architecture, environment settings, etc. At the same time, the choice of QA engineers for API testing should be approached very seriously because the low qualification of specialists will sufficiently reduce the testing of API efficiency.
    Automated API testing is usually better than manual testing because it allows faster and more efficient functionality testing and reduces the risk of human error. It also requires fewer resources, as it takes much less time to perform, but it demands high-skilled specialists.
    The choice depends on your requirements and goals. Each case should be considered individually. We use the following tools: Postman, SoapUI, Rest-Assured, Runscope, Checkly, Karate, etc.
    Challenges can range from parameter validation, response handling, and managing endpoints to simulating different conditions and handling unexpected results. Moreover, when transitioning to automation API testing, it's crucial to ensure that tests are not only fast but also accurate, adding another layer of complexity to the process.