---
title: "External post created event"
method: POST
path: "post.external.created"
tags: ["Webhook Events"]
---

# External post created event

`POST post.external.created` (webhook)

Fired when Zernio's background sync detects a natively-authored post
(created outside Zernio, e.g. a Google Business Profile localPost made in
the Google UI) for the first time. Poll-driven (~hourly), not real-time.
`post.source` is always "external".

## Payload

- WebhookPayloadExternalPost — Webhook payload for post.external.created / post.external.updated / post.external.deleted. Fired by Zernio's background sync when it detects a natively-authored post (e.g. a Google Business Profile localPost created in the Google UI), NOT a post published through Zernio. Poll-driven (~hourly), not real-time. On post.external.deleted, post.deletedAt is populated.
  - `id` string, required — Stable webhook event ID
  - `event` 'post.external.created' | 'post.external.updated' | 'post.external.deleted', required
  - `post` ExternalPostWebhookPost, required — Native (external) post data shared by all post.external.* payloads.
    - `id` string, required — Platform-native post ID (NOT a Zernio post ID).
    - `platform` string, required — Platform the post lives on (e.g. "googlebusiness").
    - `accountId` string, required — Zernio social account ID the post belongs to.
    - `url` string, nullable, required — Direct URL to the post on the platform, when available.
    - `content` string, required — Post text. May be empty.
    - `mediaType` string, required — One of image, video, gif, document, text, carousel.
    - `mediaItems` ExternalPostMediaItem[], required
      - `type` 'image' | 'video', required
      - `url` string, required
      - `thumbnail` string
    - `thumbnailUrl` string, nullable, required
    - `publishedAt` string, date-time, required
    - `source` 'external', required — Always "external" — distinguishes these from Zernio-originated post.* events.
    - `deletedAt` string, date-time, nullable — Detection time of deletion. Present on post.external.deleted; null/absent otherwise.
  - `account` object, required
    - `id` string, required
    - `accountId` string — Social account ID (same as id); canonical field for account filtering.
    - `platform` string, required
    - `username` string, 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.net/zernio/apis/zernio-api.md) · [All operations](https://skmtc.net/zernio/apis/zernio-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/zernio/zernio-api/revisions/e0cd92070858/schema)