I can't help you with REST, but I can show you how to make a SOAP request

https://imgur.com/3u75Ldf

Posting is my personal favourite https://github.com/darrenburns/posting

Hi, you may like Hurl [1] it's a cli based on curl to make REST call, add asserts on results, chains requests etc... I'm one of the maintainer

[1]: https://hurl.dev

xh is Nice: https://github.com/ducaale/xh

There's also curlie: https://github.com/rs/curlie

Httpie: https://httpie.io/cli/run

If you rephrase that to tools which deals with what the endpoints emits there is a boatload. Most emits JSON but XML can be found as well.

Personally I use jaq. Gojq is nice as well. Both. Inspired by the original ja. You can find many lists[1].

I would especially point out jid[2] which often comes in handy to explore apis.

Or if we stay at the http calling level and the command line: wget or fetch.

If you include scripting languages then most http libraries will do. With Python a simple approach would be "python -m json.tool".

[1] https://ilya-sher.org/2018/04/10/list-of-json-tools-for-comm...

[2] https://github.com/simeji/jid