Please see our status page for up-to-date information on our service uptime.
Check the following:
To check service availability, go to the service status page. There you can see if there are any current issues and you can subscribe to updates, so you're always informed about the API's uptime and downtime.
In order to use our services, you need to ensure that certain IP addresses and address ranges (listed below) are accessible to you (i.e. not blocked by your firewalls).