Unable to read values coming from an API call

Hello,
I have an API call behind an Oauth session, with a number of values set on the server side (PHP).
I am unable to read any of these values from Appconnect, either directly, or by putting them on a var:
.
ticket_length, autoclose, EM_engaged, EM_requested, none of these return anything on the client side, despite being in the json response.

Would anyone have a clue of why this is?