RubyMine, and I assume its cousin JetBrains IDEs, has a great HTTP client (Tools -> HTTP Client) that I've used when I need this sort of functionality. I've been off of Postman for quite some time, since it got so complicated, and all I wanted was something to help me make simple web requests. (No disrespect intended to those who like Postman, it's just too overwhelming for my needs.)
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