Displaying JSON files is easily done using a web server, such as NGINX. This API, once synchronized with the packages-filter output, can instead be useful to show a single package, choosing the branch, the architecture and of course the package name.
You can try this program by running it in its interpreter mode via go run main.go or build it with go build -o packages-api
Then just make a GET request to the following address, as in the example: http://localhost:8080/packages?branch=main&arch=amd64&package=nginx, or just use cURL or Postman.
The options for branch and arch (architecture) are:
branch = main, contrib, non-free
arch = amd64, arm64, armhf, i386