Here is an example of a JSON response, from the "Advanced Method" API, for an invalid request.

Use json_decode() (PHP) in order to pull out the relevant values.

See the "STW API Documentation" for details on what the values can be and what they mean (though some are self-explanatory).

{"exists":"false","image":"http:\/\/www.shrinktheweb.com\/images\/baddom-sm.jpg","verified":"false","actionmsg":"noretry","responsecode":"INVALID_REQUEST","thumbnailsize":1,"responsestatus":"BLANK_DETECTED","responsetimestamp":"1460439126","quota_remaining":168,"bandwidth_remaining":994239}