Due to API changes with tumblr, we are not able to support them with ScribeFire.
Obtaining and Maintaining an API Key. In order to use the Tumblr API or Tumblr Firehose, you must obtain appropriate API credentials (an “API Key”) via registration on the Developer Website. You will not share your API Key, will keep your API Key secure, and will use it as your sole means of accessing the Tumblr API or Tumblr Firehose.
We are sorry for any inconvenience this causes.