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Our tools Swagger is a set of open-source tools that help developers build, document, and consume RESTful web As a QA engineer, leveraging the right tools can make a significant difference in your testing process. Download and run Swagger's open source Editor. Free REST API for testing and prototyping with real responses, no signup needed. SoapUI is the world’s most widely-used automated testing tool for SOAP and REST APIs. API testing is crucial in today’s software development lifecycle. ️ Test endpoints, validate responses, and connect to your server easily. It provides an interactive web-based interface that makes it easy for developers to understand and explore APIs. 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