If you prefer a GUI application for trying out API calls, then that seems pretty reasonable to me! There are lots of options but for this example I'll be using my personal favourite, Postman. It's available as a cross-platform desktop app, or it can be used from the browser. - Source: dev.to / about 1 month ago
Charles - HTTP proxy / HTTP monitor / Reverse Proxy
DreamFactory - DreamFactory is an API management platform used to generate, secure, document, and extend APIs.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Paw.cloud - Paw is a REST client for Mac.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.