Open-Source Tools for API Automation

In this lesson, we will learn about popular open-source tools available for API automation.

Popular REST API automation tools

Some of the most popular open-source REST API automation tools are:

Rest Assured

This is one of the most popular libraries for REST API test automation with extensive community support. We have used this automation library in this course.


Unirest is a set of lightweight HTTP libraries available in multiple languages. It also uses DSL for writing automation tests.


It is an open-source project and an efficient HTTP client. It supports HTTP 2.0 and allows all requests to the same host to share a socket. OkHttp’s request/response API is designed with fluent builders and immutability. It supports both synchronous blocking calls and async calls.

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