If you use IntelliJ based products, the builtin HTTP Client is awesome. https://www.jetbrains.com/help/idea/http-client-in-product-c...

If you use computers, Curl is awesome. https://curl.se/

If you use a router, manually connecting wires to send data is awesome

For JSON based REST APIs httpie is somewhat easier to use.

In the same sense that no one needs a graphics editor when imagemagick is available via the command line.

Yeah, this is what I moved to after Insomnia started down the same path as Postman. Very portable text files that can work anywhere.

Came here to recommend this.

It does just about everything you can think of, and since it’s just “a text file”, easy to store in git.

The ability to easily use the output from previous responses in subsequent requests makes for great story demos and/or test cases.

And it’s all done in VS Code, using tools/keystrokes/colors you already know and love. :)