---
title: Event subscriptions
description: Subscribe to R2 bucket events and Super Slurper events using Cloudflare Queues.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# Event subscriptions

[Event subscriptions](https://developers.cloudflare.com/queues/event-subscriptions/) allow you to receive messages when events occur across your Cloudflare account. Cloudflare products (e.g., [KV](https://developers.cloudflare.com/kv/), [Workers AI](https://developers.cloudflare.com/workers-ai/), [Workers](https://developers.cloudflare.com/workers/)) can publish structured events to a [queue](https://developers.cloudflare.com/queues/), which you can then consume with Workers or [HTTP pull consumers](https://developers.cloudflare.com/queues/configuration/pull-consumers/) to build custom workflows, integrations, or logic.

For more information on [Event Subscriptions](https://developers.cloudflare.com/queues/event-subscriptions/), refer to the [management guide](https://developers.cloudflare.com/queues/event-subscriptions/manage-event-subscriptions/).

## Available R2 events

#### `bucket.created`

Triggered when a bucket is created.

**Example:**

```
{  "type": "cf.r2.bucket.created",  "source": {    "type": "r2"  },  "payload": {    "name": "my-bucket",    "jurisdiction": "default",    "location": "WNAM",    "storageClass": "Standard"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `bucket.deleted`

Triggered when a bucket is deleted.

**Example:**

```
{  "type": "cf.r2.bucket.deleted",  "source": {    "type": "r2"  },  "payload": {    "name": "my-bucket",    "jurisdiction": "default"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

## Available Super Slurper events

#### `job.started`

Triggered when a migration job starts.

**Example:**

```
{  "type": "cf.superSlurper.job.started",  "source": {    "type": "superSlurper"  },  "payload": {    "id": "job-12345678-90ab-cdef-1234-567890abcdef",    "createdAt": "2025-05-01T02:48:57.132Z",    "overwrite": true,    "pathPrefix": "migrations/",    "source": {      "provider": "s3",      "bucket": "source-bucket",      "region": "us-east-1",      "endpoint": "s3.amazonaws.com"    },    "destination": {      "provider": "r2",      "bucket": "destination-bucket",      "jurisdiction": "default"    }  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `job.paused`

Triggered when a migration job pauses.

**Example:**

```
{  "type": "cf.superSlurper.job.paused",  "source": {    "type": "superSlurper"  },  "payload": {    "id": "job-12345678-90ab-cdef-1234-567890abcdef"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `job.resumed`

Triggered when a migration job resumes.

**Example:**

```
{  "type": "cf.superSlurper.job.resumed",  "source": {    "type": "superSlurper"  },  "payload": {    "id": "job-12345678-90ab-cdef-1234-567890abcdef"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `job.completed`

Triggered when a migration job finishes.

**Example:**

```
{  "type": "cf.superSlurper.job.completed",  "source": {    "type": "superSlurper"  },  "payload": {    "id": "job-12345678-90ab-cdef-1234-567890abcdef",    "totalObjectsCount": 1000,    "skippedObjectsCount": 10,    "migratedObjectsCount": 980,    "failedObjectsCount": 10  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `job.aborted`

Triggered when a migration job is manually aborted.

**Example:**

```
{  "type": "cf.superSlurper.job.aborted",  "source": {    "type": "superSlurper"  },  "payload": {    "id": "job-12345678-90ab-cdef-1234-567890abcdef",    "totalObjectsCount": 1000,    "skippedObjectsCount": 100,    "migratedObjectsCount": 500,    "failedObjectsCount": 50  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `job.object.migrated`

Triggered when an object is migrated.

**Example:**

```
{  "type": "cf.superSlurper.job.object.migrated",  "source": {    "type": "superSlurper.job",    "jobId": "job-12345678-90ab-cdef-1234-567890abcdef"  },  "payload": {    "key": "migrations/file.txt"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

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