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6 Best REST API Tools for Testing, Design, and Development

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The API system (Application Programming Interfaces), which has become one of the sine qua non of the internet world, is the name given to the structures that enable two software or databases to work seamlessly with each other and to communicate with each other in the most healthy way.

API has to satisfy users and visitors in every way. A well-designed API system will run smoothly, and it is the biggest role in retaining customers and visitors.

At this point, it is very important to test and design the APIs that have been developed. In this article, existing Test, Design and Development tools for Rest APIs will be mentioned.

API System


Postman combines lightning speed with world-class performance to synchronize with the request behavior of an API. It allows you to edit and customize your request headers, manage SSLs and domain-specific cookies.

With a simple and elegant user interface and experience, it allows you to easily debug and display response information graphically in an attractive environment. However, you can also create reusable request source code in various programming languages.

In addition to having a GraphQL data loader, Postman has the ability to query for APIs designed using the SOAP or REST architectural protocol. You can view in-depth information about an API architecture with versatile API schemes such as RAML, WADL, and OpenAPI.

For more information: https://www.postman.com/



TestRail is a Test Management Tool that we can access over the web, which generally helps administrators / leaders to monitor the progress of tests, and allows test engineers to create test scenarios regularly and quickly.

It is a tool where we can create projects, write test scenarios, find errors by running the scenarios we have written in a certain order and report the errors we find.

Along with these advantages of TestRail, you will have reviewed the behavior of the Rest APIs in your project.

For more information: https://www.gurock.com/testrail/



One of the most important needs in Rest API development is the need for documentation. Because what the Rest API methods do and how they are used should be clear in the documentation. Manually writing API documentation is both difficult and impossible to keep up to date. Somehow it is necessary to produce this documentation up-to-date. This is where swagger comes into play.

An important purpose of Swagger is to provide an interface for Rest APIs. This allows both people and computers to see, examine and understand the features of RestApis without accessing the source code.

For more information: https://swagger.io/



SOAPUI is a tool used for testing purposes in the web service integration process. It is used to call a web service or perform functional testing in a web service. Based on its name, it is possible to test not only Soap services but also Rest APIs.

SoapUI also supports all standard protocols and technologies, which means you can use it to test all kinds of APIs. Its design and interface are also quite simple, allowing both technical and non-technical users to use them without any problems.

For more information: https://www.soapui.org/



Fiddler is more than a Rest API testing tool. It offers a wide variety of features for debugging and testing web requests and API calls.

While the tool is versatile, you can access the Rest API testing feature from the Fiddler Everywhere plan. While a little scary, it has synchronization and real-time traffic monitoring for HTTPS requests made in your browsers. Still, this doesn’t seem like an important feature when testing a Rest API.

Still, the app has advanced Rest API testing capabilities to evaluate security, speed, performance, and structural functionality. You can share test updates between teams.

For more information: https://www.telerik.com/fiddler



ReadyAPI is a microservice and API testing tool from SmartBear. It has an enabling environment for complex validation of APIs built around multiple architectural frameworks, including REST, SOAP, and GraphQL.

ReadyAPI is easy to integrate into an application’s production line, so it’s a valuable tool to consider if you run an ecosystem committed to DevOps.

The application clearly defines sections for performance, security, and load testing.

For more information: https://smartbear.com/product/ready-api/overview/



Individual users or businesses can use any of the hundreds of API tools that will reduce the workload for the Rest APIs of the applications they develop.

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