Account Locked or Developer Over Rate

It seems that my account has reached some sort of rate.  I've tried to find a place where it shows me the rate limit and I only found it in one forum post from 2009.  Where a moderator stated the rate limit is 400 calls/sec, and 20 POST calls/sec.  I'm not sure how accurate that still is, but I would like to know why I got this message:

Constant Contact HTTP Request Exception:

Developer Over Rate

I am certainly not hitting that rate and if I am then there is something seriously wrong with my code.  Is there anyway for you to track how many API calls are being made?