mendeley changed the endpoint to https://api.mendeley.com/catalog/ as request parameter iam sending now doi=doi&view=stats to retrieve the same data
here is the API Documentation http://dev.mendeley.com/methods/#retrieving-catalog-documents
furthermore as response you will get an array of objects and only the stats as object. maybe i could make a pull request but my ruby skills are very low
updated Mendeley source to use v.1 API. Closes #239.
Thanks for the heads up - I thought I had more time to upgrade the source to use the latest Mendeley API version. The source is now updated.