Field equivalence

Which native platform field feeds each unified field, for the metrics people compare most across platforms.

Each platform names the same number its own way: TikTok says play_count, YouTube says viewCount, Twitter/X says views.count. In a response, all three arrive as post.engagement.views. The tables below show, per platform, which native fields a unified field is filled from.

Build comparisons on the unified field once and they work across every platform listed. Several native names per platform means different endpoints on that platform expose the value under different names.

The paths on this page are schema 2, which every key gets from October 4, 2026.

Fields that moved in schema 2

Some values used to sit in ext on a few platforms. Schema 2 gives them one place on every platform:

Value	Previous place	Schema 2
Author ID on a post	`ext.author_id` (Facebook, Instagram lists, LinkedIn, TikTok), `ext.channel_id` (YouTube)	`post.author.id`
Author ID on a comment	`ext.author_id`, `ext.author_channel_id` (YouTube), Reddit's `t2_` ID in `author.display_name`, Facebook's `pfbid…` ID in `author.username`	`comment.author.id`. Reddit's stays `t2_…`, prefix kept.
Reddit account ID on a post or profile	`author.display_name` (posts), `display_name` (profiles)	`post.author.id` and the profile's `id`, as `t2_…` with the prefix kept, so posts, comments and profiles join on one value. `display_name` is then `null`.
Language of a post or comment	`ext.content_language`, `ext.default_language`	`post.language`, `comment.language`
Rounded follower count	`ext.followers_approximate`	`author.followers_approximate` (profiles)
Bio link	`ext.bio_link` (TikTok, X), `url` (Instagram)	`author.external_url`. `author.url` is always the profile.
Original Unix timestamp	`ext.published_at_epoch`	Removed. `published_at` is always ISO 8601 UTC.
Post format	`ext.media_type`, `ext.content_type`, `ext.post_type`	`post.kind`. The `ext` keys stay where the platform sends them.
YouTube `ext` keys	camelCase	snake_case, such as `made_for_kids`, `category_id`, `default_audio_language`

author.id is null where the source gives no ID (usually Threads, Twitter/X and Pinterest posts), and the response lists it in unavailable.

Engagement

`post.engagement.views`

Platform	Native field
Facebook	`interested_count`, `reachEstimate`, `reach_estimate`, `social_context.interested_count`, `videoViewCount`, `view_count`
Instagram	`data.xdt_shortcode_media.video_play_count`, `items.0.play_count`, `media.play_count`, `play_count`
Threads	`post.view_counts`, `view_counts`
TikTok	`aweme_info.statistics.play_count`, `ch_info.view_count`, `impression`, `lifetime_views`, `statistics.play_count`, `stats.playCount`, `userCount`, `vv_count`
Twitter/X	`view_count`, `views.count`
YouTube	`viewCount`, `viewCountInt`

The Facebook interested_count entries are events, where views carries the interested count; see Metric substitutions.

`post.engagement.likes`

Platform	Native field
Facebook	`going_count`, `like_count`, `reactionCount`, `reactions_count`, `social_context.going_count`
Instagram	`data.xdt_shortcode_media.edge_media_preview_like.count`, `items.0.like_count`, `like_count`, `media.like_count`
LinkedIn	`activity.num_likes`, `data.activity.num_likes`, `stats.total_reactions`
Pinterest	`pin_count`, `reaction_counts.1`, `totalReactionCount`
Reddit	`score`, `ups` (a score below zero gives `null` here and `ext.score`)
Threads	`like_count`, `post.like_count`
TikTok	`aweme_info.statistics.digg_count`, `like`, `likes`, `statistics.digg_count`, `stats.diggCount`
Twitter/X	`favorite_count`, `legacy.favorite_count`
YouTube	`likeCount`, `likeCountInt`

`post.engagement.comments`

Platform	Native field
Facebook	`commentCount`, `comment_count`, `comments_count`
Instagram	`comment_count`, `data.xdt_shortcode_media.edge_media_to_parent_comment.count`, `items.0.comment_count`, `media.comment_count`
LinkedIn	`activity.num_comments`, `data.activity.num_comments`, `stats.comments`
Pinterest	`aggregatedPinData.commentCount`, `aggregated_pin_data.did_it_data.responses_count`
Reddit	`comments`, `num_comments`
Threads	`post.text_post_app_info.direct_reply_count`, `text_post_app_info.direct_reply_count`
TikTok	`aweme_info.statistics.comment_count`, `comment`, `statistics.comment_count`, `stats.commentCount`
Twitter/X	`legacy.reply_count`, `reply_count`
YouTube	`commentCount`, `commentCountInt`

`post.engagement.shares`

Platform	Native field
Facebook	`share_count`
Instagram	`items.0.reshare_count`
LinkedIn	`activity.num_shares`, `data.activity.num_shares`, `stats.reposts`
Pinterest	`repin_count`, `shareCount`
Threads	`post.text_post_app_info.repost_count`, `text_post_app_info.repost_count`
TikTok	`aweme_info.statistics.share_count`, `share`, `statistics.share_count`, `stats.shareCount`
Twitter/X	`legacy.retweet_count`, `retweet_count`

`post.engagement.saves`

Platform	Native field
Instagram	`items.0.save_count`
Pinterest	`aggregatedPinData.aggregatedStats.saves`, `aggregated_pin_data.aggregated_stats.saves`
TikTok	`aweme_info.statistics.collect_count`, `statistics.collect_count`, `stats.collectCount`
Twitter/X	`bookmark_count`, `legacy.bookmark_count`

A platform listed here may still return null on most surfaces; Metric substitutions says where. A platform missing from a table never fills that field: see Never shown publicly.

Never shown publicly

These post counts are not shown publicly on most of the platform. They are null on most endpoints, and a response never lists them in unavailable:

Platform	Post fields
Instagram	`engagement.shares`, `engagement.saves` (Sends and saves come only from the stats endpoints named on Post)
Facebook	`engagement.saves`, `author.username`
Threads	`engagement.saves`
YouTube	`engagement.shares`, `engagement.saves`
Reddit	`engagement.views`, `engagement.shares`, `engagement.saves`, `author.display_name`
LinkedIn	`engagement.views`, `engagement.saves`
Pinterest	`engagement.views`

Post content

`post.content.text`

Platform	Native field
Facebook	`accessibility_caption`, `description`, `message`, `name`, `snapshot.body`, `snapshot.body.text`, `text`, `title`
Instagram	`caption`, `caption.text`, `data.xdt_shortcode_media.edge_media_to_caption.edges.0.node.text`, `items.0.caption.text`, `media.caption.text`, `title`
LinkedIn	`data.text`, `description`, `text`, `title`
Pinterest	`description`, `name`, `title`
Reddit	`title`
Threads	`caption.text`, `post.caption.text`
TikTok	`adTitle`, `ad_title`, `aweme_info.desc`, `ch_info.cha_name`, `desc`, `hashtag`, `name`, `title`
Twitter/X	`note_tweet.note_tweet_results.result.text`
YouTube	`content`, `title`

`post.published_at`

Platform	Native field
Facebook	`creation_time`, `publishTime`, `startDateString`, `start_date_string`, `start_timestamp`, `timestamp`
Instagram	`data.xdt_shortcode_media.taken_at_timestamp`, `items.0.taken_at`, `media.taken_at`, `taken_at`
LinkedIn	`created_at`, `data.created_at`, `posted_at.timestamp`, `startDate`
Pinterest	`createdAt`, `created_at`
Reddit	`created_utc`, `creationDate`
Threads	`post.taken_at`, `taken_at`
TikTok	`aweme_info.create_time`, `createTime`, `create_time`, `created_at`, `first_shown_date`, `publish_time`
Twitter/X	`created_at`, `legacy.created_at`
YouTube	`publishDate`, `publishedAt`, `publishedTime`, `videoPublishedAt`

Whatever the native format (ISO string, Unix seconds or milliseconds, X's own date text), published_at is ISO 8601 in UTC, ending in Z.

Author

`author.followers`

Platform	Native field
Facebook	`followerCount`, `likes`, `member_count`
Instagram	`data.user.edge_followed_by.count`, `follower_count`, `user.follower_count`
LinkedIn	`data.follower_and_connection.follower_count`, `data.follower_count`, `follower_count`, `follower_count_display`
Reddit	`subscribers`
Threads	`follower_count`
TikTok	`follower_count`, `user.follower_count`, `user_info.follower_count`
Twitter/X	`legacy.followers_count`, `member_count`
YouTube	`SubscriberCount`, `subscriberCount`

`author.following`

Platform	Native field
Instagram	`data.user.edge_follow.count`, `following_count`, `user.following_count`
LinkedIn	`data.follower_and_connection.connection_count`
TikTok	`following_count`, `user.following_count`, `user_info.following_count`
Twitter/X	`legacy.friends_count`

`author.posts_count`

Platform	Native field
Instagram	`data.user.edge_owner_to_timeline_media.count`, `media_count`, `user.media_count`
TikTok	`aweme_count`, `user.aweme_count`, `user_info.aweme_count`
Twitter/X	`legacy.statuses_count`
YouTube	`TotalVideosCount`, `videoCount`

`author.likes_count`

Platform	Native field
Facebook	`likeCount`
TikTok	`total_favorited`, `user.total_favorited`, `user_info.total_favorited`

Reddit and Threads profiles never carry following, posts_count or likes_count; Reddit karma is in ext.post_karma and ext.comment_karma. For every field, its nullability and per-platform coverage, see the Post, Author and Comment pages.

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