The posts api currently return data from your twitter cards,
- twitter_image: null,
- twitter_title: null,
- twitter_description: null,
There is nothing about what you have set the facebook cards to, if something has been set for these values, I think they should be returned similarly to the twitter information.
facebook_image: null,
facebook_title: null,
facebook_description: null,
maybe I am looking in the wrong place for this.