JMeter is an open-source software designed for load testing and application performance measurement. It supports API testing in Java but was originally designed to test web applications.
Features:
- This software supports HTTP/HTTPS, FTP, SOAP, REST, and other protocols to perform detailed testing across different application layers.
- Command-line mode loads API tests from any OS.
- Scripting is supported using Groovy and BeanShell languages to implement complex test logic and workflows in API performance tests.
- Continuous integration is supported through third-party open-source libraries to catch API performance issues early.
- Caching and replaying of API test results are supported.