BitMEX systems were the victim of a DDoS that disrupted API connectivity for some users. BitMEX identified the attack at 16:57 UTC and we have fixed the issue by 17:10 UTC. All systems are now fully operational. We are continuing to monitor the situation.
We apologise for any inconvenience this may be causing. We are looking into the cause of this issue, and will be sharing an update as soon as possible. If you have any further questions, please contact us via https://www.bitmex.com/app/support/contact