Graph API: Adding Captions To User Generated Photos

Question

I'm trying to get my application to post photos to a user's timeline using the user generated picture feature of Open Graph. Unfortunately, while I can easily get the picture to the user's timeline, I haven't found any documented way to pass along a caption.

Instagram seems to have figured it out: https://i.sstatic.net/TYsiX.png

Yet, if you go to the page of one of their posts, you'll notice that the caption isn't present in any of the Open Graph meta tags, so I'm guessing this is a value passed along with the POST.

Any suggestions?

Answer 1

There is an optional message attribute that you can pass to the action:

https://developers.facebook.com/docs/opengraph/define-actions/

Under optional arguments.

It takes special approval when you submit your action for approval