In the gdax-java library there's a note that the sandbox was shutdown. The GDAX API still mentions it, though, so I tried it and can get lists of orders, make a web socket connection, etc.
However, trying to place an order on the sandbox simply returns {"message":"forbidden"}
Does anyone know the current status of the sandbox? Should I be able to place orders on it?
GDAX Sandbox appears to be up.
Submitted order moments ago:
Received this output of buy:
Ensure you are using currency pairing BTC/USD as I did above. It will work.
Also, make sure your API is allowed to "Trade." In the past, I had API's built that were only in the view type. This would forbid you from Trading using the API.