Top 10 API Testing Tools

1. Postman: Postman is a popular API testing tool used for designing, testing, and documenting APIs. It offers a user-friendly interface to send various types of HTTP requests, view responses, and create automated test scripts. Postman supports collaboration features, making it an excellent choice for teams working on API development and testing.

2. Insomnia: Insomnia is a powerful API testing tool that provides an intuitive interface for creating and testing API requests. It supports features like environment variables, request history, and automated testing. Insomnia is well-suited for developers who want a modern and efficient tool for API testing.

3. REST Assured: REST Assured is a Java library that simplifies API testing and automation. It allows you to write tests in a natural language style and supports various authentication methods and response validations. REST Assured is particularly useful for Java developers who want to integrate API testing into their existing projects.

4. SoapUI: SoapUI is a comprehensive testing tool for both SOAP and REST APIs. It offers a graphical interface to create, execute, and automate test cases. SoapUI supports various authentication methods, data-driven testing, and assertions to validate responses.

5. JMeter: Apache JMeter is primarily known for load testing, but it can also be used for API testing. It simulates user traffic to test an API's performance and scalability under different conditions. JMeter supports various protocols and offers extensive reporting.

6. Karate: Karate is a scripting tool that combines API testing, performance testing, and API mocking. It uses a natural language syntax and integrates with Cucumber, making it suitable for those who prefer a BDD (Behavior-Driven Development) approach.

7. Paw: Paw is a Mac-native API tool that provides a GUI for designing, testing, and documenting APIs. It offers features like dynamic values, scripting, and collaborative API design. Paw is well-suited for Mac users who want an intuitive and visually-oriented testing experience.

Remember to visit the official websites of these tools for the most up-to-date information and download links.