Originally Posted by
_NightWare
Please clarify what you mean, what kind of api this is, and what you mean with " no need for an API key"
Correct me if i'm wrong, but
You have a calling(?) api that needs an key to be used. but you don't have said key and still want to use it.
If so, you could try to brute force the key (if you want to spend the rest of your life on getting the key, assuming it's a long, random key like just about every api uses.)
Or you could setup some sort of phishing program to get the key of others.