The IntelliJ http client is absolutely brilliant. I love that using it is just editing a text file. Even if I didn't use everything else in IDEA, it would be worth it to fire up the IDE just for http scratch spaces.
Yeah I stumbled on this just the other day as well when reading about another IDE from JetBrains (I've been a paying IDEA customer for years). I'm looking forward to checking this out the next time I need to test HTTP endpoints. Postman has been decent for my needs but I always found some basic stuff to me way more difficult than it should be. The scripting in IDEA is something I'm very interested in. Postman had some of that but was more difficult that it should have been IMHO. Also I really like the idea of all my requests being text-based and something I can just commit alongside my code.
Devs at our company predominantly use IntelliJ's builtin HTTP client. I think I've only seen QA engineers use Postman because they don't have developer IDEs installed.
Vscode has an http_client module that's very similar to intellij's as well. Practically the only thing you've gotta change is how requests are saved to variables
https://www.jetbrains.com/help/idea/http-client-in-product-c...
https://www.jetbrains.com/help/idea/exploring-http-syntax.ht...