20 Best API Testing Tools in 2022

In version 7.3 of 2020, Postman uses new advanced preferences to help users smartly organize the collections and API elements generated from API schemas. Also, you could manage your team’s public data and share links to all items in the workspace, such as collections, requests, APIs from Postman app. To help you overcome the challenges listed above, we created a REST API testing guide with insights on commonly used REST API testing best practices and tools.

Apigee, a Google Cloud service, has API administration capabilities. Apigee customers can use other editors like Swagger to support and build APIs and measure and evaluate API performance. SoapUI Pro is a sophisticated tool for creating, running and analyzing complicated tests on web services for development and testing teams. SoapUI has several unique features, such as test reports and SOAP API testing. Your API testing tools should be simple to use, which means that even a beginner user can pick it up and start using it with little training and achieve fantastic results. API testing is a sort of software testing that looks to see if APIs are up to par.

The platform enables simple and secure data exchange between applications thereby simplifying software development and innovation. API testing has become absolutely vital with the rise of cloud applications and interconnected platforms. Many of the services we use daily rely on multiple interconnected APIs, so even if just one of them is malfunctioning, then the entire service is at risk.

Similar to soak testing, here you subject your API to the heaviest load while reducing the time of the attack. Contrary to stress testing, here an https://globalcloudteam.com/ API undergoes a sudden spike of users. Spike testing checks whether the API is able to stabilize and return to normal functioning after that.

After that, you’ll have to contact a Google Cloud sales specialist to find a pricing plan that works for you. Rest Assured is another free and open-source testing resource for developers. It’s a Java library that streamlines HTTP requests to REST APIs.

Soap UI

Some QAs, however, still ignore this layer of the test pyramid, and proceed right to UI testing – at their peril. In this article, we explain why you should do API testing and how to approach it. Paw can help you compose HTTP queries, evaluate a server’s response, and even generate client code, whether you’re an API creator or a consumer. RapidAPI is the world’s largest API marketplace, with over a million developers using a single account to search, test, and connect to thousands of APIs.

REST API testing tools

The tool is very flexible and allows testers to customize it according to their requirements. By integrating JMeter with Jenkins, users can include API tests within CI pipelines. Simulate how consumers interact with your APIs by loading data from Excel, files, and databases.

However, for additional features, it costs $12 for each user per month. Karate DSL allows testers to write meaningful tests for web service using a domain-specific language. It is available in the central Maven repository so that you can add Citrus as a Maven dependency to your project. It’s a free, open-source tool with custom scripting functionalities that you can utilize your programming skills to fit project requirements. Also, Karate UI allows you to write tests in any language that can handle HTTP, JSON, or XML. Choosing among the tools we described, keep in mind that some of them are better for writing an automation framework , while other tools can be utilized as they are.

Rest Assured with Gradle Kotlin DSL & JUnit 5

You can find out more about SOAP and how it differs from REST in our dedicated article. Please use ide.geeksforgeeks.org, generate link and share the link here. These were my top API tools, but yours may differ significantly.

Load tests that run over a long period of time can reveal system instabilities like API memory leaks. So when you have a weekend ahead, leave automated soak tests running. On Monday, it will show you whether any unwanted behavior has emerged. In the Agile processes, where instant feedback is needed, unit and API testing are preferred over GUI testing as they are quicker to create and easier to maintain. While the latter requires considerable rework to keep pace with frequent change. Following the pattern of the testing pyramid, first is the unit test layer – code testing often performed by developers while writing it.

The 9 Best Online API Testing Tools – MUO – MakeUseOf

The 9 Best Online API Testing Tools.

Posted: Fri, 29 Oct 2021 07:00:00 GMT [source]

API testing, in essence, detects bugs, inconsistencies, or deviations from an API’s expected behavior. SoapUIis the world’s most widely-used automated testing tool for SOAP and REST APIs. You can use SoapUI to write, run, integrate, and automate advanced API Tests easily in your project. This tool backs the automation of API tests right at each stage of the explicit continuous integration and precise delivery pipeline. It offers support for operating the API tests after deployment and integration with familiar tools like Slack and Zapier. We are introducing you to the next automated testing tool on the list called Citrus.

List of 21 Best API Automation Testing Tools [with Pros & Cons]

We’ve been helping API development and testing teams build exceptional APIs for over 10 years. It’s important to choose an API testing tool or a combination of tools on par with your specific requirements. Finding the ideal tool that can accomplish everything is tough, but it’s important to adopt a tool set that fulfills your organization’s needs and boosts revenue. Users can access its features using different editors, such as Swagger. Obviously, the killer feature here is a framework that learns with each test suite execution and maintenance activity. But, on top of that, you can create API actions and validations for standard testing activities.

REST API testing tools

However, both performance and memory management must be enhanced. Debugging code is difficult, as there are no compile-time error checks. As a result, it verifies the documentation’s accuracy and puts the API to the test. For example, PHP, Node.js, Python, Rust, Ruby, Perl, and Go are supported.

Citrus Framework

Software applications rarely exist in isolation — instead, they use application programming interfaces to communicate with other software systems. Therefore, you need API testing tools to ensure your API performs as expected when faced with various requests. Karate DSL is a unified framework for API automation testing, mocks, performance testing, and load testing. Test scenarios for API-based BDD have never been easy to create. Karate, on the other hand, has all the step definitions written for developers so we don’t have to worry about writing them.

Knowing the answers to such questions would enable you to select the best tool for your team and your organization. Facilitates the building, execution, and automation of performance and functional testing. Subsequently, it’s the most powerful monitoring tool for SOAP and REST.


Let’s go over the fundamentals of API testing before we look at the top 15 API testing tools in 2022. Httpieis another command-line tool that you can use to test your REST APIs. It’s nothing but an HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, which makes testing REST APIs easier and fun. Besides that, the tool should be able to group the API requests and organize them into collections. It works quite well enough with the rack applications like Grape.

  • When calling an API, a client application sends multiple requests, which must be called in the correct order.
  • It has crafted one workspace for numerous public APIs, which is really tough to find in any other testing tool.
  • SOAPSonar is an API testing and diagnostics platform for SOAP, XML, REST-based web services.
  • SoapUIalso supports all the standard protocols and technologies which means you can use it to test all kinds of APIs.
  • If the requests are handled in the wrong order, the program will return an error.

When considering functional test automation solutions, there are five essential elements that you should check off. API testing is unquestionably important for detecting faults across several application layers and providing a consistent customer experience. When a client sends a REST request to a server, information is retrieved and sent back to the client. Communication was very easy, and knowledge of work was excellent.

Postman client: testing of RESTful APIs using a JavaScript library

There are parallel execution capabilities for functional tests, as well as for job queues. This tool can create bulk assertions against hundreds of API quickly with its Smart Assertion feature. Ensure a seamless api testing best practices integration between business processes and corresponding APIs. Support all types of services including REST, SOAP, and GraphQL. Integrations are possible with tools such as GitHub, Slack, and Zapier, etc.

API testing framework vs ready-made API testing tool

Download the REST API testing guide below to find the right testing approach for your projects. One of the best ways to ensure the security of a REST API is to test all of its parameter combinations. However, with each added parameter, the amount of possible combinations increases exponentially. Going through these parameter combinations manually is highly time-consuming and challenging. The point of load testing is to measure where the limit of system performance under high load lies. That’s why we measure response times, throughput, server conditions, etc., while increasing the number of calls.

Postman REST Client

In API Testing you use software to send calls to the API, get output and log the system’s response. For Agile development, Api Testing becomes important as shorter development cycles put more pressure on automated testing. Hoppscotch is a tool in the API tool category of the technology stack. It is a free and fast API request generator with a minimalistic UI design, allowing you to send requests and get/copy responses in real-time. Therefore, you can create requests faster, saving valuable development time.

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