---
title: "Send event data (single)"
method: POST
path: "/integrators/timeline/2026-03/events"
tags: ["Advanced"]
---

# Send event data (single)

`POST /integrators/timeline/2026-03/events`

Send a single instance of event data to a specified event type.

## Request body

- CrmTimelineAppEventOccurrence
  - `domain` string
  - `email` string
  - `eventTypeName` string, required
  - `extraData` object
  - `id` string, required
  - `objectId` string
  - `objectTypeFullyQualifiedName` string
  - `properties` object, required
  - `timelineIFrame` CrmTimelineTimelineEventIFrame
    - `headerLabel` string, required — The label of the modal window that displays the iframe contents.
    - `height` integer, required — The height of the modal window in pixels.
    - `linkLabel` string, required — The text displaying the link that will display the iframe.
    - `url` string, required — The URI of the iframe contents.
    - `width` integer, required — The width of the modal window in pixels.
  - `timestamp` string, date-time
  - `utk` string

## Response `200`

App Event Occurrence was accepted and persisted successfully. Mirrored to UnifiedEvents async.

## Other responses

- `201` — successful operation
- `400` — The occurrence has a validation error that prevented us from accepting it for persistence. The response body will contain details about the validation error. Occurrence insert request rejected.
- `409` — An occurrence for this event type and occurrence ID already exists. Occurrences are immutable. Occurrence insert request rejected.
- `default` — An error occurred.

---

[API](https://skmtc.net/hubspot/apis/hubspot-api-specification.md) · [All operations](https://skmtc.net/hubspot/apis/hubspot-api-specification/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/hubspot/hubspot-api-specification/revisions/f9c7181056c5/schema)