$ pip install flask2postman

$ flask2postman example.app --name "Example Collection" --folders > example.json

$ flask2postman example.create_app --name "Example Collection" --folders > example.json

usage: flask2postman [-h] [-n NAME] [-b BASE_URL] [-a] [-i] [-f]
                     flask_instance

positional arguments:
  flask_instance

optional arguments:
  -h, --help            show this help message and exit
  -n NAME, --name NAME  Postman collection name (default: current directory
                        name)
  -b BASE_URL, --base_url BASE_URL
                        the base of every URL (default: {{base_url}})
  -a, --all             also generate OPTIONS/HEAD methods
  -s, --static          also generate /static/{{filename}} (Flask internal)
  -i, --indent          indent the output
  -f, --folders         add Postman folders for blueprints