How to pass the key to SOMETHING in website?

I got this information from a website:

{"status": "success!", "key": "KEY", "hint-1": "Pass the key to <SOMETHING>!", "hint-2": "It is on SITE.ORG!", "hint-3": "ok then, press F12 "}

If i want to get answer i need to pass they KEY,how i should do that and with which program language?