API testing tools are technological solutions designed to efficiently test the application programming interface of your software product. API performance testing tools assist in the API testing process by determining whether APIs respond correctly to requests, maintain high security standards, and perform as expected.
API testing examines the user interface (UI) behavior of your software without interacting or loading the UI. With API integration tools, your team can get accurate data and faster test results throughout the testing process, so bugs and glitches are caught and resolved before production deployment.
The Best API Testing Tools
Having the right API testing tools is now more important than ever. We recommend that you consider these solutions in the API testing tools comparison below.
Postman
Need API testing tools that don’t require your QA team to use the same language as your developers? Postman can provide these experiences as well as support different levels of API testing. Once a Chrome browser plugin, this solution now expands with a native version for both Windows and Mac. Unlike other API integration tools in this API testing tool comparison guide, Postman offers three plans:
- Free version for individuals and small teams
- For a plan for teams of up to 50 people
- A business plan for teams of any size
Function
- It does not require learning a new language
- Designed to easily share knowledge between teams by packaging all requests and expected responses for dispatch.
- Easy to use rich interface
- Easy to use REST client
- Supports automated and exploratory testing
- It has run, test, document and monitor functions
- Dozens of integrations such as support for Swagger and RAML formats
- It runs on Mac, Windows, Linux and Chrome Apps
API Tester
Add API tester to your API testing tools when your team needs a functional testing tool for API. It’s a great choice when your team doesn’t want to create a complex API Tester from scratch in a single test environment.
Function
- Easy to use graphical interface
- Create a drag-and-drop test
- Ability to create a complex test scenario
- Enables asynchronous testing
- Supports custom workflows or features
- Mock service for imitating web services before final implementation
REST Certainty
REST service testing is simplified with REST-assured. Add this solution to your API testing tools if your team is comfortable working in an open-source Java library that provides a domain-specific language (DSL) for writing strong, reusable tests and validating complex responses.
Function
- No HTTP expertise required
- Dozens of features to set up so your team doesn’t have to code from scratch
- BDD Given/When/Then syntax support
- Easily integrates with the Serenity automation framework