This screams scam.

One should never trust a 3rd party their api key to give full control regarding trading away.

The fact that the person providing this 'service' is not reputable at all, makes it even more risky.


For anyone considering this:
OP can steal your funds by pumping a shitcoin selling his own stack to you. You will be left with a worthless coin worth a few dollars, while he will own all of your BTC.

Be cautious.