htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
HTTPie : HTTPie—aitch-tee-tee-pie—is a command line HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, and more
httpbin : Testing an HTTP Library can become difficult sometimes. PostBin.org is fantastic for testing POST requests, but not much else. This exists to cover al...
Hoppscotch : A free, online, open source API request builder
Wuzz command line arguments are similar to cURL's arguments, so it can be used to inspect/modify requests copied from the browser's network inspector with the "copy as cURL" feature.