API Testing Services

Smooth API integration with no security or performance concerns is possible — our API testing service is what you need to get there.

API Software Testing

These days, APIs are as much of a mainstay in the software development industry as UI, responsive design, or Agile. The reason why APIs are so indispensable is that they give you a shortcut to add all kinds of functionality to your product, saving you both time and money on developing a proprietary solution. From booking tickets and hotel rooms to estimating the pizza delivery time, APIs are everywhere around us. Thousands of services around the world rely on APIs for a significant part of their functionality.

Unlike a less-than-perfect UI, a faulty API is not something you or your customers can see right away when opening the website or launching the app. However, the consequences of a faulty API can be unexpectedly serious. From the inability of the customers to obtain the data they need to security concerns, there are many things that can go wrong with an untested API solution. This is why API testing is required whenever you want to enrich your software solution with an API, and why are so focused on providing API testing services with maximum attention.

Our API testing service will give you a clear idea of how the API is affecting the back-end and front-end parts of your product. To do this, we use multiple types of API testing and never close the project without carefully testing every single component and its impact on the solution. When you order API software testing from us, you can expect complete commitment to the success of your project and our QA team being there for you from start to finish.

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Reasons to Choose API Testing

  • Comprehensive testing
    When the success of your project and its reception by the audience are on the line, you cannot take any chances. Our approach to API software testing is all-encompassing and takes every single aspect and feature into account.
  • API testing expertise
    We have been delivering all types of API testing for years and we are constantly perfecting our craft. We are determined to stay on top of API testing trends while also staying true to our core software testing principles.
  • Robust functionality
    Adding one or more APIs to your software solution allows you to significantly increase the functionality of your product, which, in turn, increases customer satisfaction. Our API testing services will help you make sure that every component is working as intended.
  • Stability and security
    Customers will not stick around with a product that has stability issues or has been involved in a security controversy. Timely API testing performed by highly qualified QA engineers helps you minimize the risk of that happening.

Advantages of API testing service


    Our 21+ years of software testing experience ensures we’ve encountered nearly every type of software testing. For years of working with a number of cases we carved our testing techniques to perfection, and are ready to provide you with high-end API testing.
  • Wide testing coverage

    To us, the only acceptable outcome of our cooperation is when our clients are fully informed about the state of their API integration. And the only way to achieve that is by having the most comprehensive test coverage an API testing company is capable of.

    No matter where your business is located — our team is ready to perform API testing and ensure the transparency of the process to build a long lasting and trustworthy relationship.

    Any methodology you are used to work by — is at your hand. Agile, Kanban, Scrum, Waterfall, etc. We work with a number of businesses from different industries and can find approach to each of them.

    We adjust our way of working to your business priorities to ensure you benefit from our collaboration. You can be sure of reasonable pricing, high quality of the service, and total commitment of TestFort team to your project.

    We care about the way we do our job because we believe that responsible attitude leads to incredible results. Your testing documentation will be clear, all bugs will be fixed, the code will be clean, the software will work just as you wanted it to.

API Testing Process

  • Project Setup

    • Business analysis
    • Requirement analysis
    • Assessing the scope
    • Start of the documentation
  • Test Planning

    • Estimating the efforts
    • Requirement Traceability Matrix
    • Risks definition
    • Test plan development
  • Environment Setup

    • Hardware configuration
    • Software configuration
    • Creating test scenarios
    • Test data preparation
  • Test Execution

    • Running the tests
    • Capturing the results
    • Defects tracking
    • Analysis of the findings
  • Project Closure

    • Report summary
    • Completing the documentation
    • Improvement suggestions
    • Project acceptance & maintenance

API Software Testing Results

  • Early bug discovery
    You don’t need a finished UI to perform API testing, which is why it can happen early in the software development life cycle. As a result, potential issues can be discovered earlier and will take less time and money to be resolved.
  • Product integrity
    Whether it’s your first or tenth software solution released to the public, you want it to only have a positive impact on your image and position on the market. With good API performance across all of your products, it’s 100% possible.
  • User retention
    With the variety of solutions in the market, a typical user will only go for a product that delivers stable performance and has rich, easily accessible functionality. API software testing helps you reach higher customer satisfaction.
  • Revenue growth
    When the goal of your product is to generate revenue for the stakeholders, API use is integral for meeting your goals. A well-tested API solution will let you do more with your product, which, in turn, positively influences your revenue.

We Work With

Having one outside team deal with every aspect of quality assurance on your software project saves you time and money on creating an in-house QA department. We have dedicated testing engineers with years of experience, and here is what they can help you with.

Software is everywhere around us, and it’s essential for your testing team to be familiar with all the various types and platforms software can come with. In 21+ years, our QA team has tested every type of software there is, and here are some of their specialties.

There are dozens of different types of testing, but it takes a team of experts to know which ones are relevant to your software project and how to include them in the testing strategy the right way. These are just some of the testing types our QA engineers excel in.

The success of a software project depends, among other things, on whether it’s the right fit for the industry it’s in. And that is true not just for the development stage, but also for QA. Different industry have different software requirements, and our team knows all about them.

Icon Manual Testing

Maximum precision and attention to detail for a spotless result.

Icon Testing Automation

We’ll automate thousands of tests for all-encompassing coverage.

Icon Testing Outsourcing

Outsource your testing needs to a team of experts with relevant skills.

Icon Testing Consulting

Overhaul your QA processes to achieve even more testing efficiency.

Icon QA

Thorough Quality Assurance for a project of any scale or complexity.

Icon API Testing

Verify the correct operation of as many APIs as your project needs.

Icon IoT Testing

Stay ahead of the growing Internet of Things market with timely testing.

Icon Web Testing

Reach out to even more customers with a high-quality web application.

Icon Mobile App Testing

Help users fall in love with your mobile app with our texting expertise.


Make sure your CRM/ERP system meets the needs of the stakeholders.

Icon Desktop Application Testing

We’ll check the stability, compatibility, and more of your desktop solution.

Icon Functional Testing

Is your app doing everything it’s supposed to? We’ll help you find out!

Icon Compatibility

Check how your solution works on different devices, platforms, and more.

Icon Usability

Find out if your software solution provides an engaging user experience.

Icon UI

Make sure your application’s UI logic works for all categories of users.

Icon Regression

We’ll verify the integrity of your application after recent code changes.

Icon Online Streaming & Entertainment

Stay on top of the media industry with a technically flawless solution.

Icon eCommerce & Retail

Does your store meet customer needs? We’ll help you know for sure!

Icon HR & Recruiting

Streamline HR processes with a solution that works like a clock

Icon Healthcare

Test the functionality, stability, scalability of your app and more.

Icon Fintech & Banking

Give your users what they want: a powerful, secure fintech product.


Clients Reviews

"TestFort has been a great asset in helping us securing the quality of our Toolbars. When we needed quick help they were there for us and gave us access to a full team of testers within a matter of a few days. Over the course of our two years of partnership I have come to rely on TestFort for providing quality resources both in testing and development at a reasonable rate..."

Peter Kalmstrom, Product Manager, Skype

"A financial services company hired TestFort to provide QA testing for their app. The team performed functional testing, reported all bugs and defects to the client's team, and collaborated to fix those issues. The most impressive thing about this company is their promptness, speed, and efficiency in testing."

Head of E-Channels & Product Management , Kuwait City, Financial Services Company

"TestFort QA Lab's work was productive and highly critical for the client's success. The team communicated regularly with the client, allowing them to provide their feedback about the progress. They've met the company's expectations and they were always willing to help the client."

Eric Bade, CTO, Ricma

"TestFort QA Lab’s work has helped reduce app bugs. Thanks to them, the quality of the client’s software releases has significantly improved. The remote team excels at communication, as they’re able to overcome geographical and cultural barriers. They’ll continue to be a trusted partner".

Brad Marks, VP of Product, Freckle IoT

"TestFort has consistently delivered quality product for us and have been very accommodating when we were on tight schedules to complete our projects on time. We look forward to our continued development efforts with their team..."

Nick Brachet, CTO, Skyhook

"After working with numerous companies around the world and resulting in differing experiences for our holding, we came across TestFort and started to work with them on a single project and limited resources. Thanks to very professional technical strategy, well-managed approach and methods in implementation and taking our solution to market and the team’s exceptional dedication, since that time our cooperation significantly evolved, we extended our team with more professional resources..."

Jon Sugihara, President & Co-Founder, Perx

"Our development experience with TestFort Software has been fantastic. They have adapted to each of our projects. When we decide to take a project in a different direction they efficiently change direction with us and provide guidance and new milestones. We have been working with TestFort Software for almost three years and our relationship with them has been great. We would highly recommend TestFort Software for every type of project - simple or complex!.."

Simple Devices, Universal Electronics, Inc.

"Our cooperation with TestFort team (QA division of QArea) has a long history, multiple projects, dating back to early 2005. Compared to other companies, TestFort team provides top notch quality of testing services. They widely and, what is important, correctly applied automated testing throughout our projects. Their non-trivial approach to tasks solving and deep understanding of the subject combined with stable and highly professional team allows them to reach excellent results. When we started our new project, which is under way now, we engaged several outsourcing companies – but after a few months into testing cycle we decided to move all of the QA activities to TestFort, since we weren't getting the same high quality results from another company as we are getting from TestFort..."

Marc Cenedella, Founder & CEO, Knozen, Inc.

"During the past year TestFort has become one of our trusted development partners for Windows Phone 7 and I have no hesitation recommending them as an excellent company and software development provider to do business with."

Max Zilberman, Senior Architect, Microsoft

"During the past 4 years, TestFort has proven to be an excellent company and a great asset by providing exemplary Quality Assurance services for all Dashlane platforms (Windows, Mac, iOS, Android, Web). TestFort is playing a critical role in our quality strategy, thanks to the devotion of their testing teams to the project. I can definitely recommend working with them."

Raphael Rodrigues, Director of Quality Assurance and Localization, Dashlane

"TestFort has played a critical role in the development of HuffingtonPost.com. They have been able to become a part of the core team very quickly and develop amazing features that perform under the highest performance and demand requirements possible. They possess the highest level of business cooperation, an outstanding sense of responsibility and delivery of quality work..."

Paul Berry, CTO, Huffington Post

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