> ## Documentation Index > Fetch the complete documentation index at: https://docs.overlap.ai/llms.txt > Use this file to discover all available pages before exploring further. # Analytics Model > Field reference for the Post and Analytics objects returned by the analytics endpoints Reference for the objects returned by [`GET /posts`](/api-reference/posts) and [`GET /post-analytics`](/api-reference/post-analytics). Fields are included when available — a response may omit values that have not been generated yet (for example, `engagementScore` before the first analytics refresh). ## Post object | Field | Type | Description | | --------------------- | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `id` | string | The post id. Use as `postId` for `GET /post-analytics`. | | `platform` | string | Platform the post was published to (`youtube`, `tiktok`, `instagram`, `twitter`, `linkedin`, `facebook`, `threads`, `snapchat`, `bluesky`). | | `text` | string | The caption/description that was published. | | `postUrl` | string \| null | Public URL of the live post on the platform. | | `nativeId` | string \| null | The platform's own id for the post (e.g. the YouTube video id). | | `clipId` | string \| null | The Overlap clip the post was created from. Use with `GET /clip`. | | `status` | string | Publish status (`success`, `error`, ...). | | `mediaUrl` | string \| null | The rendered video/image that was published. | | `thumbnailUrl` | string \| null | Thumbnail used for the post. | | `createdAt` | string (ISO-8601) | When the post was published. | | `analytics` | object | Current rolled-up counters — see below. In `GET /posts` responses this object sits on each post; in `GET /post-analytics` it is returned as the top-level `analytics` object instead. | | `engagementScore` | number | See [Engagement score](#engagement-score). | | `growthRate` | number | Percentage growth of the engagement score between the two most recent refreshes. | | `lastAnalyticsUpdate` | string (ISO-8601) | When the rollup was last refreshed from the platform. | ## Analytics rollup object | Field | Type | Description | | --------------------- | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `views` | number | Current view count. Impressions are used on platforms without a native view metric. Always `0` on Bluesky (no per-post views). | | `likes` | number | Current likes/favorites. | | `comments` | number | Current comments/replies. | | `shares` | number | Current shares/reposts/retweets. | | `engagementScore` | number | See [Engagement score](#engagement-score). | | `growthRate` | number | Engagement score growth (%) between the last two refreshes. | | `lastAnalyticsUpdate` | string (ISO-8601) | Last refresh time. | | `platformMetrics` | object | The platform's own advanced metrics from the most recent refresh, keyed by platform (e.g. `{"youtube": {"analytics": {"averageViewDuration": 21, ...}}}`). Includes whatever the platform reports — watch time, retention, impressions, subscriber deltas. Shapes mirror the platforms' APIs and may change without notice. Only on `GET /post-analytics`. | ## Engagement score A single number Overlap computes to compare posts across platforms: ``` engagementScore = (likes × 2) + (comments × 3) + (shares × 4) + max(5, views / 100) ``` Weighted toward high-intent actions (shares > comments > likes), with a views term so view-heavy posts still register. Use it for relative ranking; it has no absolute unit. Browse posts and rolled-up metrics. All current analytics for one post.