jq is a great tool for processing JSON on the command line.
It’s easy to install (e.g.
apt-get intall jq) and easy to use.
When we started writing tests for our new REST API i wanted to have an easy way to query the returned JSON responses. The end result is a small wrapper around jq.
Since i have revisited our testing strategy and we moved on to using JSON Schema.
There are alternative projects which might be better suited for you.