> ## Documentation Index
> Fetch the complete documentation index at: https://docs.automate.ax/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Automate.ax automations are TypeScript programs.
> Use Bun for installation and command examples.
> Use Automate.ax for the product name and automate.ax for the package, CLI, and domain.
> Treat documented public APIs as current; do not invent transitional or deprecated names.

# On Notion data source schema updated

> Start an automation when a data-source property schema changes.

`notion.onDataSourceSchemaUpdated` start an automation when a data-source property schema changes.

## Example

```ts automations/notion-on-data-source-schema-updated.automation.ts theme={null}
import { automation } from "automate.ax"
import { notion } from "automate.ax/notion"

export default automation("On Notion data source schema updated", () => {
  const event = notion.onDataSourceSchemaUpdated()

  event.transform(({ entity }) => entity.id)
})
```

## Configuration

The trigger takes no event filters. Its optional static `account` selects a named OAuth binding and defaults to the project's Notion binding. Personal access tokens cannot own webhook subscriptions.

## Event

Returns the typed schema-update payload. Optional `data.updatedProperties` identifies created, updated, or deleted property IDs and names.

The event is narrowed to `data_source.schema_updated`; consumers do not need to inspect the raw type.

Automate.ax verifies the Notion signature, routes only to an eligible workspace principal, and deduplicates provider retries by event ID.