The link for rfc4627_jsonrpc on the plugins page is currently: http://www.rabbitmq.com/releases/plugins/v2.5.1/rfc4627_jsonrpc-2.5.1-git00caae5.ez should be: http://www.rabbitmq.com/releases/plugins/v2.5.1/rfc4627_jsonrpc-2.5.1-git30c8498.ez Regards, Gavin