Hi @jcothran
A negative point balance is what we use to void billing on API accounts. I haven’t checked, but I think it is likely that your API keys predate the billing system. If this is true, your account would have been grandfathered in without billing enabled. Since then, you have been accruing a negative balance every time you make a call.
In the future, we will be releasing a system that automatically allocates points to sensor owners which you can find out more about here: API Points for Sensor Owners. When that system releases, your keys will be transitioned back over to the billing system and we will zero-out your negative balance.