yes Cypress is a free Test Automation Framework. You can simply download via npm and use to developer ui or API test automation.
Cypress is a end-to-end testing framework that makes it simple to develop robust and flexible online application tests. It allows front-end developers and test automation engineers to build automated web tests in JavaScript, the most widely used programming language for online development. It also provides comprehensive testing capabilities for both unit and integration tests, including quick test configuration, timely reporting, and an intuitive dashboard experience, among other things. Cypress automation is particularly appealing to developers because of its usage of JavaScript.