> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://contentful.com/developers/docs/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://contentful.com/_mcp/server.

# Update or subscribe to events

PUT https://api.contentful.com/organizations/{organization_id}/app_definitions/{app_definition_id}/event_subscription
Content-Type: application/vnd.contentful.management.v1+json

Reference: https://contentful.com/developers/docs/references/content-management-api/app-event-subscriptions/update-or-subscribe-to-events

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Path parameters

- `organization_id` (string, required) — organization_id identifier
- `app_definition_id` (string, required) — app_definition_id identifier

### Body (application/vnd.contentful.management.v1+json)

This endpoint expects a map from string to any.

- `map from string to any`

## Response

### 200

OK - Request successful

- `map from string to any`

## Examples

**Request**

```json
{
  "targetUrl": "https://example.com/",
  "topics": [
    "Entry.create"
  ]
}
```

**Response**

```json
{
  "sys": {
    "appDefinition": {
      "sys": {
        "id": "<app_definition_id>",
        "linkType": "AppDefinition",
        "type": "Link"
      }
    },
    "createdAt": "2026-01-15T10:53:37.000Z",
    "createdBy": {
      "sys": {
        "id": "7BslKh9TdKGOK41VmLDjFZ",
        "linkType": "User",
        "type": "Link"
      }
    },
    "organization": {
      "sys": {
        "id": "0D9ZC8rLWiw6x5qizZGiRs",
        "linkType": "Organization",
        "type": "Link"
      }
    },
    "type": "AppEventSubscription",
    "updatedAt": "2026-01-15T10:53:37.000Z",
    "updatedBy": {
      "sys": {
        "id": "7BslKh9TdKGOK41VmLDjFZ",
        "linkType": "User",
        "type": "Link"
      }
    }
  },
  "targetUrl": "https://example.com/",
  "topics": [
    "Entry.create"
  ]
}
```

**SDK Code**

```android Android
SDK currently doesn't implement this endpoint.
```

```java Java
SDK currently doesn't implement this endpoint.
```

```kotlin Kotlin
SDK currently doesn't implement this endpoint.
```

```swift Swift
We currently don't provide a CMA SDK for this platform.
```

```js-legacy JavaScript (legacy)
import { createClient } from 'contentful-management'

const client = createClient({
  accessToken: '<content_management_api_key>'
}, { type: 'legacy' })

client.getOrganization('<org_id>')
.then((org) => org.upsertAppEventSubscription('<app_definition_id>', { targetUrl: '<target_url>', topics: ['<topic>'] }))
.then((appEventSubscription) => console.log(appEventSubscription))
.catch(console.error)
```

```javascript JavaScript
import { createClient } from 'contentful-management'

// Client init
const client = contentful.createClient({
  accessToken: '<content_management_api_key>'
})

const eventSubscription = await client.appEventSubscription.upsert({
  organizationId: '<organization_id>',
  appDefinitionId: '<app_definition_id>',
}, {
  targetUrl: `<target_url>`,
  topics: ['<Topic>'],
})
```

```php PHP
SDK currently doesn't implement this endpoint.
```

```ruby Ruby
SDK currently doesn't implement this endpoint.
```

```python Python
SDK currently doesn't implement this endpoint.
```

```.net .NET
SDK currently doesn't implement this endpoint.
```