To get the likes count for each post that is a link, the following query:
https://graph.facebook.com/#{facebookId}/links?fields=likes.limit(1).summary(true)&access_token=TOKEN&limit=20
gives you a response like this:
{
"data": [
{
"id":
"created_time:"
"likes": {
...
"summary": {
"total_count": 23
}
}
},
{
...
}
]
}
The total_count
value is what you want.