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

2. 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.

3. 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.

4. An API acts as a go-between, facilitating data
exchange between two different applications.
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.
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
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.

5. 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
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.

6. TOP API TESTING TOOLS
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.
A user-friendly REST client.
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
1. POSTMAN

7. 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.
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
2.SoapUI

8. 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.
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
3.Apigee

9. 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.
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 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
4.Tricentis Tosca

10. 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.
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 plugins in a single package,
making deployment a breeze. It provides an API testing platform that
is simple to use for anyone.
Feature
5.Katalon Studio

11. 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.
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
6.JMeter

12. 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.
Supports the Serenity automation framework’s seamless
integration.
It supports Given/When/Then test notation, which immediately
makes your tests human-readable.
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
7.Rest-Assured

13. 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.
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
8.Assertible

14. 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.
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
9.Karate DSL

15. 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.
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 quickly create, manage, and execute API tests. Swagger
assists you throughout the API lifecycle.
Feature
10.Swagger

16. 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.
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
11. ReadyAPI

17. 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.
Conclusion
1. https://www.interviewbit.com/blog/api-testing-tools/
2. https://rajat-testprepkart.medium.com/top-api-testing-tools-in-2022-
1fc455c2b65e
3. https://newsdata.io/
References