I happened to have

status: 200
{sentences:[
“Meet some problems when get the URL Text”,
“Deeply sorry for this problme, try it later”]}

as return for a url that cannot be processed.
(http://venturebeat.com/2014/11/19/google-acquires-ios-prototyping-company-relativewave-makes-flow-for-mac-free/)

In this case, don’t you guys think that the api should return something different than: [status: 200]?