---
title: "Post authenticity changed event"
method: POST
path: "post.authenticity_changed"
tags: ["Webhook Events"]
---

# Post authenticity changed event

`POST post.authenticity_changed` (webhook)

Fired when a tracked post's authenticity score crosses 40 in either direction.
Carries the new and previous score, confidence and reasons. A first score never fires it.

## Payload

- WebhookPayloadPostAuthenticityChanged: Webhook payload for `post.authenticity_changed`. Fired when a tracked post's authenticity score crosses 40 in either direction while its window is open. A post's first score never fires it.
  - `id` string, required: Stable webhook event ID: the dedupe key, also sent as the X-Zernio-Event-Id header and identical on every retry and redelivery. It identifies the event only, never an account or other resource.
  - `profiles` object[]: The profiles this event belongs to, each with the externalId you set on it (null when none is set). Use it to route the event to your tenant without storing Zernio profile ids. Present on every event tied to a profile, absent on events that belong to none. Events spanning several profiles (a post published to accounts of different profiles) list each once.
    - `id` string, required
    - `externalId` string, nullable, required
  - `test` boolean: Always true when present: only a sample sent by POST /v1/webhooks/test with an event carries it. Real deliveries never do.
  - `event` 'post.authenticity_changed', required
  - `post` object, required
    - `id` string, required: Zernio's id for the tracked post
    - `platform` string, required
    - `platformPostId` string, required: The post's id on the platform
    - `accountId` string, required: The connected account the post belongs to
    - `profileId` string, required: The profile that account belongs to
  - `authenticity` object, required
    - `score` integer, required: 0 to 100, higher is more authentic
    - `previousScore` integer, required
    - `confidence` number, required: 0 to 1, how much data the score rests on
    - `reasons` object[], required
      - `code` string, required
      - `weight` number, required
    - `version` string, required: Scoring model version
    - `computedAt` string, date-time, required
  - `timestamp` string, date-time, required: UTC time at which Zernio generated this event (set once when the event payload is built, before delivery is queued). Retries and redeliveries keep the original value, so it reflects the event, not the delivery attempt.

## Acknowledgement `200`

Webhook received successfully

---

[API](https://skmtc.dev/zernio/apis/zernio-api.md) - [All operations](https://skmtc.dev/zernio/apis/zernio-api/llms.txt) - [OpenAPI document](https://skmtc.dev/zernio/apis/zernio-api/revisions/c319eb5d95b6?raw)