Command

while true; do curl -X GET \
  -H "Content-Type: application/json" \
  -H "authorizationHader: $TOKEN" \
  $ENDPOINT_URL | python -m json.tool && sleep 60; done

Explication

Variables:

• ENDPOINT_URL https://api.ecma.com/v1/endpoint
• TOKEN s0meAuthenticationTokenJustHereToSetAnExampleHeader

infinite loop

while true;
do
  # do stuff.
done

Curl

• -X <command>, --request <command> http verb. GET, POST, PUT, PATCH, DELETE, …
• -H <header>, --header <header>: set custom header

python

• -m module-name Searches sys.path for the named module and runs the corresponding .py file as a script
• json.tool validate and pretty print python

delay

• sleep _seconds_ suspend execution for seconds

Documentation

• https://docs.python.org/2/library/json.html
• OSX python 2.7.12 man page
• OSX curl 7.43.0 man page
• OSX builtin man page