The JSON pointer package also installs a jsonpointer commandline utility that can be used to resolve a JSON pointers on JSON files.

The program has the following usage

usage: jsonpointer [-h] [--indent INDENT] [-v] POINTER FILE [FILE ...]

Resolve a JSON pointer on JSON files

positional arguments:
  POINTER          File containing a JSON pointer expression
  FILE             Files for which the pointer should be resolved

optional arguments:
  -h, --help       show this help message and exit
  --indent INDENT  Indent output by n spaces
  -v, --version    show program's version number and exit

# inspect JSON files
$ cat a.json
{ "a": [1, 2, 3] }

$ cat b.json
{ "a": {"b": [1, 3, 4]}, "b": 1 }

# inspect JSON pointer
$ cat ptr.json
"/a"

# resolve JSON pointer
$ jsonpointer ptr.json a.json b.json
[1, 2, 3]
{"b": [1, 3, 4]}