title: Check if PayPal API/Service is available/up
body: <p>I am integrating PayPal into a Java payment service and was wondering if there is easy way to tell if PayPal API is up and running. I checked the documentation and found the error code <code>10101 - This API Temporarily Unavailable</code>  but couldn't find a method that should be used to poll the service. The idea is if the API is down I won't show PayPal as available payment option. The actual integration is Express checkout.</p>