Mon May 11 2015 14:58:00 GMT-0700 (Mountain Standard Time)
While trying to access MyeBay in sandbox, it is throwing 'Http/1.1 Service Unavailable ' error.
We are aware of this issue, and the engineering team is actively working to resolve the issue.
If you are still blocked due to this issue, please file a support request here : http://developer.ebay.com/support/developersupport/default.aspx , or
report the issue in the forum : https://forums.developer.ebay.com/spaces/15/ebay-apis-getting-tokens-not...
We sincerely apologize for the inconvenience this issue may have caused.