API testing has established a trend for automated testing as software development teams become more technologically oriented. More tools will be developed to meet these requirements. Regardless of how difficult it is to find a tool that can do everything, adopting a toolset that meets a company’s needs while increasing revenue is critical. Before choosing one, consider how each API testing tool may be better suited for specific purposes and what features are essential for your software development workflows.

1. Top 11 API Testing Tools For 2022
My team is created a RESTful API that is Newsdata.io news API to fetch
and download news data and we have used a few of these API testing tools
to test our APIs that is why I am sharing a list of the top 11 API testing tools
in 2022.
With the rise of cloud applications and interconnected platforms, API
testing has become critical. Many of the services we use on a daily basis rely
on multiple interconnected APIs, so if even one of them fails, the entire
service is jeopardized. API testing has become essential for software
developers in order to ensure that APIs perform as expected.

2. The number of API testing tools available today can be overwhelming, so
how do you choose the best one? Don’t worry, we’ve compiled a list of the
best API testing tools to help you get your work done faster. Let’s go over the
fundamentals of API testing before we look at the top 15 API testing tools in
2022.
What is an API?
API is an abbreviation for Application Programming Interface. It is a
software interface that allows two applications to communicate with one
another without the need for user intervention.
APIs enable a product or service to communicate with other products and
services without requiring knowledge of how they are implemented.
It facilitates communication between the provider and the client. It is a type
of software interface that provides a service to other programs. An API
specification is a document or standard that describes how to build or use
such a connection or interface.
An API is said to be implemented or exposed by a computer system that
meets this standard. API can refer to either the specification or the
implementation.
Features of API
• An API acts as a go-between, facilitating data exchange between two
different applications.

3. • An API makes it easier to embed content from any website or
application.
• It allows a company or user to personalize the content and services they
use the most.
• APIs anticipate future software changes (updates).
• APIs are simple, adaptable, and simple to use.
• It offers excellent developer support.
APIs that do not function efficiently and effectively, regardless of whether
they are free to use, will never be adopted. As a result, API testing is critical
because API testing improves the overall effectiveness of a testing strategy,
resulting in faster software development.
What is API Testing?
API (Application Programming Interface) testing directly tests APIs to
determine whether or not the API developed meets certain requirements in
terms of application functionality, performance, security, and reliability.
API testing, in essence, detects bugs, inconsistencies, or deviations from an
API’s expected behavior.
Unlike GUI (Graphical User Interface) tests, API tests are primarily
concerned with the Business logic layer of the software architecture rather
than the look and feel of the application.
It is critical for software companies to have a product that meets
expectations. In this regard, API testing is critical for integration testing

4. because it determines whether or not the business logic is followed
correctly. Because API testing is a complicated subject, we cannot test it
manually and must instead rely on API testing tools. As a result, you should
use the best API testing tools available.
Top API Testing Tools
1. Postman
Postman, which began as a Google Chrome plug-in, has evolved into one of
the most popular API testing tools. With the primary goal of testing API
services, it has expanded its services to include native Windows and Mac
versions. In either case, it’s an excellent choice for exploratory or manual
testing. You can use Postman to monitor APIs, automate tests, debug, and
run requests. It has a lot of features, it’s free, and it’s highly rated by users.
Feature
• Postman supports the creation of Boolean tests without the use of a
command line.
• Postman’s interface can be used to extract API data.
• This platform includes built-in tools that allow you to interact with an
API, collections that allow you to automate tests, debug, monitor APIs,
and run requests, and workspaces that allow you to collaborate.
• APIs can be designed using the Swagger and RAML (RESTful API
Modeling Language) formats.

5. • A user-friendly REST client.
2. SoapUI
SoapUI is a functional testing tool that is the world’s leading SOAP and
REST testing solution. It essentially functions as a headless API testing tool.
With SoapUI’s user-friendly graphical interface and enterprise-class
features, you can quickly and easily create and execute automated
functional, regression, and load tests. SOAPUI supports a variety of
protocols and technologies for testing all types of APIs. The SOAPUI
interface is simple to use, so both technical and non-technical users can
benefit from it.
Feature
• Its point-and-click and drag-and-drop functionality simplifies complex
tasks (such as working with JSON and XML) and allows for the rapid
creation of tests.
• Loading data from Excel, files, and databases allows you to simulate how
customers interact with your APIs.
• The free package provides access to the complete source code of SoapUI.
• Data-driven testing is effective because it loads data from databases,
Excel spreadsheets, and files to simulate user interaction with APIs.
• Data-driven testing is supported by SoapUI.
• REST (Representational State Transfer), SOAP (Simple Object Access
Protocol), JMS (Java Messaging Protocol), JDBC (Java Database
Connectivity), and numerous other protocols are supported.

6. 3. Apigee
Apigee is a cross-cloud API development and management tool provided by
Google. Apigee allows its users to access its features through other editors
such as Swagger. Users can use Swagger to measure, test, build, and support
APIs. It also added TLS (Transport Layer Security) security, Open API 3.0
support, virtual host management improvements, and more software
support to provide users with even more flexibility when managing their
APIs. The application allows you to create and configure API packages,
revenue models, reports, payment gateways, and integrations with
developer portals.
Feature
• To identify performance issues, monitor API traffic, error rates, and
response times.
• Allows you to create and deploy API proxies in the cloud using the Open
API Specification.
• On-premises (in a private cloud) or in the cloud, with a hybrid
deployment model used occasionally.
• There is a customizable developer portal as well as Node.js support.
• Apigee is capable of handling APIs with a large amount of data.
4. Tricentis Tosca
Tricentis Tosca makes it simple to incorporate continuous testing into Agile
and DevOps. It is a software testing tool that supports HTTP, AMQP
(Advanced Message Queuing Protocol), SOAP (Simple Object Access

7. Protocol), and many other protocols. Multiple aspects of software testing
(test case design, automation, data generation, and analytics) are used in
this approach to analyze GUIs and APIs from a business standpoint. It
provides comprehensive test case functionality to ensure an efficient test
management process. It enables no-code, script-free end-to-end test
automation.
Feature
• With model-based test automation, maximizes reuse and simplifies scrip
maintenance.
• Allows API tests to be run across mobile, cross-browser, and packaged
apps to provide end-to-end testing.
• Ensures that regression tests are completed in a timely and efficient
manner.
• Test managers can use this tool to perform manual testing without
having to set up Tosca environments.
• Through the use of new technology, it is possible to achieve long-term
automation.
5. Katalon Studio
Katalon Studio is a free tool for automating web service, application, and
mobile app testing. It is quickly becoming the go-to tool for API/Web
services testing because it offers the comprehensive solution that developers
and testers require. It includes all frameworks, ALM integrations, and

8. plugins in a single package, making deployment a breeze. It provides an API
testing platform that is simple to use for anyone.
Feature
• It supports commands and parameterizes functions in addition to SOAP
(Simple Object Access Protocol) and REST (Representational State
Transfer) requests.
• It enables the integration of UI and API/Web services across multiple
platforms, including Windows, Mac OS, and Linux.
• AssertJ, one of the most powerful assertion libraries, should be
supported so that you can create fluent assertions in a BDD style.
• This can be used for both automated and exploratory testing.
• The approach based on data is encouraged.
6. JMeter
JMeter is an open-source tool developed by Apache that is used to analyze
and test the performance of software applications, products, and services.
Originally designed for load testing, this tool is now widely used for
functional API testing. There is a plethora of API testing functionality
available, as well as additional features to enhance the process. This tool can
be used to test JDBC database connections as a unit-testing tool. JMeter
version 5.4 was released in December 2020, with bug fixes and core
enhancements.
Feature

9. • Users can include API tests in CI pipelines by integrating JMeter with
Jenkins.
• The tool is extremely adaptable, allowing testers to tailor it to their
specific needs.
• It can be used to test performance with both dynamic and static
resources.
• It is ideal for working with CSV files and enables teams to create unique
parameter values for testing.
• It runs load and performance tests on a wide range of server platforms.
7. Rest-Assured
If you want to test RESTful services in Java, you should look into Rest-
assured. It is an open-source platform that provides Java domain-specific
languages to make testing REST services easier. It is frequently used to test
JSON and XML-based applications.
Feature
• Users do not need to write code from scratch because of its built-in
functionality.
• It provides a number of authentication methods for testing and
validating a secure API.
• It supports all HTTP methods, but it also explicitly supports several
command types, including POST, GET, PUT, DELETE, OPTIONS, and
PATCH.

10. • Supports the Serenity automation framework’s seamless integration.
• It supports Given/When/Then test notation, which immediately makes
your tests human-readable.
8. Assertible
Assertible offers simple and dependable API uptime and performance
monitoring. It continuously tests web services and places a premium on
automation and dependability. Assertible announced Encrypted variables in
October 2019, a new feature that provides a new option for storing tokens,
passwords, and secret fields required for API testing. It has long been
recognized as a dependable API tool.
Feature
• Assertible supports the automation of API tests at every stage, from
continuous integration to the delivery pipeline.
• API tests can also be run after the application has been deployed.
• Integrations with tools such as GitHub, Slack, and Zapier, among others,
are possible.
• Support HTTP response validation with turn-key assertions such as
JSON Schema validation and JSON Path integrity checks.
• Users no longer have to manually update their tests after adding new
parameters or changing the API response as a result of the Sync feature.
• Assertible makes API testing simple and effective.
9. Karate DSL

11. Karate DSL is a unified framework for testing API automation, mocks,
performance, and load. It has never been easy to create test scenarios for
API-based BDD. Karate, on the other hand, already has all of the step
definitions written for developers, so we don’t have to worry about writing
them ourselves. This tool, created by Intuit, is specifically designed for
automated API testing. This tool does not require users to have any
programming skills. However, having a basic understanding of HTTP,
JSON, XML, XPath, and JsonPath is advantageous.
Feature
• Tests can be written in virtually any language that supports HTTP,
JSON, or XML.
• It has strong assertion capabilities.
• Configuration switching and staging, as well as parallel multi-threading
execution, are all supported.
• Testing and report generation are supported in the same way that other
Java projects are.
• With this tool, users can reuse payload data and user-defined functions
across tests.
• This tool does not necessitate any programming knowledge.
10. Swagger
Swagger is a web-based API testing tool that allows users to test
functionality, security, and performance directly from the open API
specification. Swagger tooling and the Ready API platform make it easier to

12. quickly create, manage, and execute API tests. Swagger assists you
throughout the API lifecycle.
Feature
• Swagger Inspector allows you to inspect API response requests and
ensure they function properly.
• Import user API definitions to validate schema rules.
• Automatically generating assertions against endpoints and injecting
synthetic data into parameters.
• Creating complex load scenarios in order to evaluate API performance.
• All types of services are supported, including REST, SOAP, and
GraphQL.
11. ReadyAPI
ReadyAPI is a no-code API testing platform that is designed to simplify your
testing workflows. You can test RESTful, SOAP, GraphQL, and other web
services for functionality, security, and load using SmartBear’s ReadyAPI
platform. API functional testing, API performance testing, API security
testing, and API & Web virtualization are just a few of the tools available
with this user-friendly platform. By utilizing this platform, you can ensure
the quality of all web services from beginning to end. You will also be able to
create data-driven and comprehensive API tests.
Feature

13. • With its Smart Assertion feature, this tool can quickly generate bulk
assertions against hundreds of APIs.
• It natively supports Git, Jenkins, Docker, Azure, and other services.
• There is also command-line support for automated testing.
• Parallel execution is available for both functional tests and job queues.
• Furthermore, it includes features and functionalities that enable the
reuse of functional tests as well as the generation of realistic load
scenarios.
• During testing and development, ReadyAPI also allows you to remove
dependencies.
Conclusion
API testing has established a trend for automated testing as software
development teams become more technologically oriented. More tools will
be developed to meet these requirements. Regardless of how difficult it is to
find a tool that can do everything, adopting a toolset that meets a company’s
needs while increasing revenue is critical. Before choosing one, consider
how each API testing tool may be better suited for specific purposes and
what features are essential for your software development workflows.
References
1. https://www.interviewbit.com/blog/api-testing-tools/
2. https://rajat-testprepkart.medium.com/top-api-testing-tools-in-2022-
1fc455c2b65e

14. 3. https://newsdata.io/