Postman - The Collaboration Platform for API Development
HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Hoppscotch - Open source API development ecosystem
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.
Request inspector - Debug web hooks, http clients