Postman without Snap
You don't need Snap/Flatpak to install Postman on Linux.
Developers can use Postman to practice CRUD operations. For Suckless users, it's important to be able to install Postman without Snap/Flatpak.
INFO
Suckless users are minimalistic Linux/BSD/Haiku software users. The suckless.org community produce software with a focus on minimalism, simplicity and clarity.
Go to the Postman app download page at www.getpostman.com/apps. You can download a tar.gz for Linux 64 bit. Extract the archive:
tar -xzf postman-linux-x64.tar.gz
Then move the extracted folder to the /opt directory. /opt is the folder intended for third party software that is not part of the core system.
doas mv Postman/ /opt/
doas ln -sf /opt/Postman/app/Postman /usr/bin
sudo mv Postman/ /opt/
sudo ln -sf /opt/Postman/app/Postman /usr/bin