API Testing Services

Almost every modern application uses application programming interfaces (APIs) to communicate between two software platforms. Whether you build software through which users make requests or create a computer program that responds to them, it is equally important to conduct API testing. Along with functionality, there are a lot of other aspects of API programming code, like reliability or compliance. Neglecting any of them may result in serious consequences. So before you make your product available to end-users, it should go through thorough testing. Learn more about why testing APIs is essential and how our experienced quality assurance (QA) team can help you.

API Testing: What It Is and Why It Is So Crucial

API testing is the process of testing software by sending calls to the API and validating its performance, functionality, reliability, and compliance. By conducting this type of software testing, QA engineers check whether the output received from the API lives up to the established requirements.

The main difference from user interface (UI) testing is that API tests don’t check whether the program’s appearance looks good or whether it is easy to navigate through the platform’s features. Its main focus is to validate the responses from the API endpoints for their accuracy.

Without API testing, you can risk not receiving the following benefits:

Improved API quality. The main benefit of running API tests is detecting code errors and bugs. Identifying what prevents the mechanisms from transmitting information smoothly can improve the API’s overall quality, particularly the results, which should meet the established standards.
Saved time. Testing of APIs doesn’t take a lot of time. It is quicker to conduct than, for example, performance testing and is easier in terms of the tools used. You can develop automated tests that will run without effort for API testing.
Reduced costs. By detecting the API imperfections in the development stage, you can save in the long run as you will not have to go over the errors in the future. While the product is already being used by the end users, it is way too complicated to fix something as it will interrupt the use of the software.
Consistent integrations. Robust integrations are key to delivering seamless software experiences. When your products integrate with third-party services or internal systems through APIs, comprehensive testing provides consistency across these connections.
Scalability. Scalability is key if you want your API to stand the test of time. Load testing lets you see how well your API holds up as user traffic and workload grow. Moreover, the insights you gain allow you to plan ahead. Smoothly scaling an API requires planning and preparation.
Agility. Stable APIs foster agility since your developers don’t have to waste time worrying whether they’ll break something. With a reliable API backbone, your team can iterate freely and deliver cutting-edge capabilities to users faster.
Ease of usage. Another benefit of API testing is that it is language and technology-independent. It is transferred in the XML and JSON formats in the data transmission processes. Thus, you can use any programming language for its development. Also, API testing doesn’t require a user interface to be accessed. So even if your application is not yet designed, you can run API tests simultaneously with development.

In terms of quality, API testing is an essential procedure. You can discover many aspects of software business logic by running API tests. Not only will it help you improve the functionality level, but also such important indicators as time and data and robustness. And when you are sure about your “internal kitchen”, it is easier to build the UI part.

Our Approach To API Testing

Even though this type of software testing is low-maintenance, it requires deep expertise and knowledge of the instruments to use. Having tested applications for years, our QA engineers have an exceptional approach to testing API. At our company, we know APIs are the backbone of modern software — they allow different systems to communicate and integrate seamlessly. With APIs becoming so critical, we take API testing very seriously to ensure no issues appear in the future.

Our testing strategy is based on gaining a deep understanding of the API first. First of all, we check the API documentation. Knowing what business processes you build and what role your software plays in them is essential. We analyze the results and outputs you expect to get from testing the API and focus on what you want to achieve. Armed with this knowledge, we can test APIs effectively and comprehensively.

Depending on the API peculiarities, we adjust our environment for testing. We chose the relevant free and paid tools. During the text execution, our QA team uses a combination of black-box, white-box, and grey-box testing techniques since, for comprehensible results, it is not enough to rely on methods of one type.

By working with us, you can get yourself long-term test maintenance. While making changes or releasing new features, you might also want to check the API’s performance.

API Testing Types We Conduct

As an experienced API testing company, we offer many API testing types.

Automated API Testing
Because testing APIs is different from interface testing, requiring particular knowledge in that field. Our specialists can use additional tools and run automated API testing. The procedure is to create test suites that will run automatically, and the task will be to analyze the results. While this type of software testing is quick, it might not be as effective in error detection as it runs on prewritten scenarios, dismissing the possibility of other variations.
Manual API Testing
A human eye in testing can identify the slightest detail that needs improving. This is what our QA team does during manual API testing. They manually send requests to the API and investigate the responses according to the API specifications. This testing method lasts longer than the automated one but helps to receive more precise results.
API Functional Testing
If you want to be sure about the quality aspect of your software’s API, API functional testing should be your choice. This type of testing goes beyond the surface-level validation of whether the API works or not. Instead, it examines the API’s behavior in great detail to make sure it perfectly matches the intended functionality. By checking the functionality of the API, we verify that its performance is of the highest quality and produces the expected output.
API Reliability Testing
If testing aims to determine whether the API works without complications and interruptions, our QA engineers will offer API reliability testing. This method’s main focus is testing the API’s ability to deliver correct results consistently. We will also check how well it performs when integrating different devices. However, you might not base the overall API testing only on this method, as it lacks other details to be checked.
API Integration Testing
Inside the software, several APIs or multiple elements of one API might exist. Their communication and data exchanges ensure continuous work, synchronization, and accurate results. That is why our QA team also offers this type of software testing. During API integration testing, we will discover whether different components and APIs communicate seamlessly and don’t interrupt each other.
API Regression Testing
By conducting API regression testing, we ensure your API will work efficiently no matter what changes you implement. Our team will do everything possible so that the existing features don’t lose their functionality if you improve them. Regression testing is useful for building a future perspective on the product. However, it will not replace any other types of testing that provide results for the core functions of software.
End-to-End API Testing
During end-to-end (E2E) testing, our QA specialists go through the interaction with the software from the beginning to the end. That means that they act like real users: go to the browser, insert the URL, and start making calls. End-to-end API testing can be performed either in an automated or manual way. Along with all its benefits, E2E testing is quite expensive and time-consuming.

How We Conduct API Testing

For every client, we build an API testing procedure following these steps:

Requirements discussion

By gathering together, we identify the scope of work, your budget, and goals.

Plan creation

As soon as we know what you expect to receive, we build a plan to ensure every team member is aware of the tasks to perform.

Test execution

We conduct API testing using different approaches and methods.

Report preparation

We document every step and detail to provide a comprehensive test overview.

Making recommendations

Our team also advises on how to fix the bugs so your development team can start immediately.

Tools that White Test Lab uses to test

What our customer are saying

White Test Labs has earned new end customers for the client and saved them money and time; they’ve enhanced the client’s QA process, and their work has resulted in a quicker onboarding process. The innovative team exceeds expectations, meets deadlines, and communicates well remotely.

The company has been able to speed up their development cycle, thanks to White Test Lab’s effective QA services. The team’s workflow is great. They’ve integrated into the client’s team and communicated well with them and other stakeholders. They also show a positive attitude toward the project.

White Test Lab has supported the client’s ability to develop iterative value and consistent and regular releases to production. White Test Lab is part of the client’s Agile development team, meets the project’s deadlines, and is responsible, adaptable, and proactive. Their supportiveness stands out.

White Test Lab’s QA work improved the quality of the client’s marketing apps and ensured stable work for their instances. The team exhibited a high level of communication and project management. White Test Lab’s responsiveness and flexibility to the client’s changing requirements were excellent.

Thanks to White Test Lab’s QA efforts, the client noticed fewer iterations on builds, meeting expectations. The team managed the project well and communicated via email and a messaging app. Overall, their response approach and work ethic impressed the client.

Thanks to White Test Lab’s efforts, the client has seen improvements in their website’s UX; they’ve also noticed a reduction in downtime. The team ensures a smooth workflow by being highly responsive to the client’s needs. What stands out about the team is their receptiveness to feedback.

Platforms

Expert testing on diverse platforms for seamless performance assurance

iOS
Android
Mac OS X
Windows
Linux

Tools We Use

Mastering a Range of Tools for Comprehensive QA Testing and Optimization

Why Choose Our API Testing Services

Here are the benefits of cooperating with our professional QA team.

Improved Software Quality

API testing in software testing can predict many errors and help reduce them before users use your program. Our team provides excellent testing services and adjusts the techniques according to the client’s needs.

Saved Time and Costs

Our web API testing engineers have tested multiple platforms. We have created numerous testing strategies, so you don’t have to dedicate extra time to investigating the testing process yourself. As we can detect errors in the early stages, you won’t have to rework your API’s features in the future, saving you a lot of money.

Enhanced User Experience

By testing the software’s API, we investigate important aspects such as load time, functionality, and reliability that directly influence user satisfaction. Thus, by making sure the API of the software works seamlessly and flawlessly, we can boost your user experience to the next level.

frequently asked questions

Stuck on something? We're here to help with all your questions and answers in one place.

What is API testing?

API testing refers to the process of researching an API’s usability, responsiveness, reliability, and overall performance. This type of software testing can be part of integration testing or a separate testing procedure.

What are the benefits of API testing?

By running an API test, as the software owner, you can gain the following benefits: improved product quality, enhanced user satisfaction, saved time and money, increased safety, and many others.

What types of testing of APIs do you provide?

Our experienced QA team conducts all types of API testing. We can investigate your software manually or using automated tools. Also, we test API’s functionality, reliability, and integration and provide regression and end-to-end testing.

Why choose White Test Lab?

By turning to our service, you choose an experienced QA team that knows how to handle any type of API testing according to the requirements and deadlines. We offer mobile, desktop, and website testing for any operating system and device type.

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