Facebook API - How to post a website link with a custom image?

Question

My goal is to post to my FB page (/{page-id}/feed) a link to a website, choosing the image to show instead of the picture scraped automatically from the web page. The image I'd like to show is not in the web page, so I cannot use the og:image tag.

I'm using the current API (v2.9) and this is what I've tried so far in the Graph API Explorer:

• the picture parameter, that does not work as expected (it doesn't replace the automatic image)
• picture and link parameters both pointing to the image url, with an action button, but it must have the same url used for the link parameter
• the child_attachments parameter, but I need at least 2 images and the final result is quite different, too
• additional fields of the link parameter, but thy were removed in the 2.9 API
• a lot of combinations between these parameters, with no luck

What am I missing?

Answer 1

For information regarding why it isn't working. I assume they removed it to force users to add it to their website like Twitter did with their Twitter cards and maybe to stop impersonating pages.

https://developers.facebook.com/docs/sharing/reference/feed-dialog#deprecated-params