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API Testing Tools

An Application Programming Interface (API) is essentially a collection of functions and procedures that can be executed by external applications.

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An Application Programming Interface (API) is essentially a collection of functions and procedures that can be executed by external applications. A vital part of using APIs is making sure that their behind-the-scenes calls are seamless to the end-user. Additionally, security is a high concern since you either allowing your own API to be used by others, or you are using an API developed by someone else. Testing API functionality, integration, and security is very important and often requires specialized automated tools to make the process more efficient. Our QA Automation experts are familiar with all of the following tools and can help implement them for your QA organization.


SoapUI is the worldsoapui’s leading Functional Testing tool for SOA and Web Service testing. With its easy-to-use graphical interface, and enterprise-class features, SoapUI provides complete test coverage – from SOAP and REST-based Web services, to JMS enterprise messaging layers, databases, Rich Internet Applications, and much more. SoapUI performs and validates a login procedure while testing your enterprise messaging and capturing client-server SOAP traffic. With its breakthrough Web Services Coverage, SoapUI lets you dynamically analyze how well your SOAP or REST Service contract is covered by your Functional Tests. SoapUI MockServices let you mimic and create robust tests against Web Services before they are implemented. They eliminate the expense of building full-scale replicas of your production systems and enable consumers to access the services without having to wait for them to be built or available. You can simulate any desired behaviour, no matter how complex, and completely configure service responses.


Another GUI based performance benchmarking tool. It’s really easy to use for simple API testing but a little bit troublesome to do more complex chaining of requests when a workflow is necessary.


Postman is a powerful HTTP client to help test web services easily and efficiently. Postman lets you craft simple as well as complex HTTP requests quickly. It also saves requests for future use so that you never have to repeat your keystrokes again. This tool creates and sends any HTTP request using the Postman request builder. The clean user interface keeps in focus only those elements which you need. Postman also encodes data for you, uploads files, or sends binary data. Every request you send using Postman gets stored in the history and can be loaded into the builder later. You can store requests for an API together in collections. Along with storing request data you can also store request specific documentation. Collections can be shared within your team or with other users of your API.

Runscope Radar

Runscope Radar is a tool which automates testing for APIs and backend services. Using Runsope Radar, spot API problems before they break your application. View live status for your app’s backend services in one place. Email and notifications make sure your team knows about problems before your customers do.

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