Sublime has requester which works quite well if you’re familiar with the Python requests syntax. You write the query in the equivalent Python line and then use some hotkeys to execute/send it. Variables can be used/stored in the file for common, verbose variables such as auth tokens. The response comes back in a new tab and it’s fairly easy to search through.
I suspect that Vim, Sublime, or Notepad++ should likely already have a good equivalent of it, too.