EDIT: As of April 12th, 2016 Facebook has published a reactions endpoint for posts as part of their v2.6 release of the GraphAPI
GET /v2.6/{object-id}/reactions
More information can be found here: https://developers.facebook.com/docs/graph-api/reference/post/reactions
END EDIT
I’m not sure if Facebook has published this yet, but the reaction information is currently available in the Graph API v2.5. I pasted the response below. I achieved this result by hitting the insights endpoint. For each object listed in the response below, take a look at the ‘id’ property, it has more granular query endpoints.
GET /v2.5/{object-id}/insights
RESPONSE:
{
"name": "post_reactions_like_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Like Reactions",
"description": "Lifetime: The total number of like reactions to your post.",
"id": "{node_id}/insights/post_reactions_like_total/lifetime"
},
{
"name": "post_reactions_love_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Love Reactions",
"description": "Lifetime: The total number of love reactions to your post.",
"id": "{node_id}/insights/post_reactions_love_total/lifetime"
},
{
"name": "post_reactions_wow_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Wow Reactions",
"description": "Lifetime: The total number of wow reactions to your post.",
"id": "{node_id}/insights/post_reactions_wow_total/lifetime"
},
{
"name": "post_reactions_haha_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Haha Reactions",
"description": "Lifetime: The total number of haha reactions to your post.",
"id": "{node_id}/insights/post_reactions_haha_total/lifetime"
},
{
"name": "post_reactions_sorry_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Sorry Reactions",
"description": "Lifetime: The total number of sorry reactions to your post.",
"id": "{node_id}/insights/post_reactions_sorry_total/lifetime"
},
{
"name": "post_reactions_anger_total",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Lifetime Anger Reactions",
"description": "Lifetime: The total number of anger reactions to your post.",
"id": "{node_id}/insights/post_reactions_anger_total/lifetime"
},
{
"name": "post_reactions_by_type_total",
"period": "lifetime",
"values": [
{
"value": {
"like": 0,
"love": 0,
"wow": 0,
"haha": 0,
"sorry": 0,
"anger": 0
}
}
],
"title": "Lifetime Reactions by type",
"description": "Lifetime: The total number of reactions to your post by type.",
"id": "{node_id}/insights/post_reactions_by_type_total/lifetime"
}