In recent years, APIs have become one of the most significant trends in transforming organizations into truly digital enterprises. Therefore, it’s no wonder that more and more companies whose target is to unify software development and testing tend to favor API Testing.
The rise of APIs also has been met by an increase in tools for testing, managing them. While new tools emerge and others go out of demands day by day, here are some helpful reviews and comparisons to help speed up the process of choosing the right API testing solution. Let’s get an insight into the highlighted tools!
Katalon Studio is a free automation test tool that provides a familiar environment to create and execute UI functional, API, Web, Desktop /Web services, and mobile testing.
The capability to combine UI and Business levels (API/Web services) for different environments (Windows, Mac OS, Linux) has been considered an advantage of Katalon Studio.
Katalon Studio supports either SOAP and RESTful requests with various commands (GET, POST, PUT, DELETE) with parameterized capability.
- Support combination test between UI and API verification.
- Support testing both SOAP and RESTful requests.
- Hundreds of built-in keywords for creating test cases.
- Support one of the most powerful assertion libraries – AssertJ to create fluent assertions with BDD style.
- Support the data-driven approach.
- We can use it for both automated and exploratory testing.
Pricing: Free – $69/license/month
SoapUI is a headless functional testing tool dedicated to API testing, allowing users to test REST, SOAP APIs, and Web Services quickly. Since February 2019, the latest version SoapUI 5.5 was released with the Endpoint Explorer dialog for users to send exploratory requests and analyze responses without creating a project. Besides, extended HTTP methods such as PROPFIND, LOCK, UNLOCK, COPY, and PURGE are provided.
- Create custom code using Groovy
- Load test scripts and security scans can easily reuse for functional testing
- Robust data-driven testing for files, databases, and Excel files to simulate how consumers interact with the APIs
- Native CI/CD integrations
- Advanced features, like an assertion wizard for Xpath, a form editor, and an SQL query builder
Pricing: Free – $659/year
Being initially a Chrome browser plugin, Postman now extends its solution with the native version for both Mac and Windows.
Postman is a great choice for API testing for those who don’t want to deal with coding in an integrated development environment using the same language as the developers.
- Easy-to-use REST client
- A rich interface which makes it easy to use
- It is useable for both automated and exploratory testing
- Can run on Mac, Windows, Linux & Chrome Apps
- Has a couple of integrations like support for Swagger & RAML formats
- Has Run, Test, Document, and Monitoring Features
- Doesn’t require learning a new language
- Enable users to easily share the knowledge with the team as they can package up all the requests and expected responses, then send it to their colleagues.
Pricing: Free – $12/user/month
Tricentis Tosca is a continuous testing platform for Agile and DevOps. The latest version 13.1, updated in March 2020, started to support web service security configuration in the API Connection Manager. Users can also use the signature security option so that they can sign multiple parts of a message. Additionally, it allows testers to read and write files dynamically with a file connection in the API Engine.
- Supports many arrays of protocols: HTTP(s) JMS, AMQP, Rabbit MQ, TIBCO EMS, SOAP, REST, IBM MQ, NET TCP
- Additionally, it integrates into the Agile and DevOps Cycle.
- Maximize reuse and maintainability with model-based test automation
- In addition to this, we can use API tests across mobile, cross-browser, packaged apps, etc.
- Achieve sustainable automation with new technology
- Additionally, it reduces the time of regression testing.
Pricing: Free Trial – Contact Sales
Apigee is a cross-cloud API testing tool, allowing users to measure and test API performance, support, and build API using other editors like Swagger. Starting from February 2019, the latest version of Apigee gives users even more flexibility to manage their APIs with features such as Open API 3.0 support, TLS security, self-healing with apigee-monit, virtual host management improvements, and more software support. Recognized as one of the leaders in the Gartner Magic Quadrant 2019 for Full Lifecycle API Management in the fourth consecutive time, Apigee offers these benefits:
- Allows the design monitor, deploy, and scale APIs
- Recognizes performance issues by tracking API traffic, error rates, and response times.
- Smoothly creates API proxies from the Open API Specification and deploy them in the cloud.
- Cloud, on-premise, or hybrid deployment model on a single code base
- PCI, HIPAA, SOC2, and PII for apps and APIs
- Apigee is purpose-built for digital business, and the data-rich mobile-driven APIs and apps that power it.
Pricing: Free Trial – $2,500/month
So, what are yours?
Above is the list of both open-source and commercial tools that help QA engineers from entry to expert level to ease the job of testing APIs. There are many other API testing tools available out there; each of them is perfect in certain areas and struggle in others. View the full list of API Testing Tools for 2020
Hence, the testing team needs to define their particular demand before diving into finding a tool. For example, with CI/CD integration, the ability to perform a single test quickly, and collecting statistics about performance are more critical than others.
Overall, there is no perfect tool for all areas, but these are the top five highlighted tools. If you miss your favorite one, please feel free to share your suggestion below.