Postman - The Collaboration Platform for API Development
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Ping-API - Automated API testing and monitoring.
Hoppscotch - Open source API development ecosystem
Reqsave - Execute web requests with your browser.
soapUI - SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.