I recommend https://paw.cloud for just the Postman clone - it has native UI, not an Electron shell.
For doing proxies, there is https://proxyman.io, which I think is also native (haven't used it a lot, not sure)
For doing proxies, there is https://proxyman.io, which I think is also native (haven't used it a lot, not sure)
... and as a result works only on Mac, so not usable for close to 90% of people. Every coin has 2 sides.
* https://blog.paw.cloud/paw-joins-forces-with-rapidapi/
* https://twitter.com/luckymarmot/status/1359541539161190401