---
title: Event subscriptions
description: Subscribe to Workers AI events using Cloudflare Queues for asynchronous processing.
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/workers-ai/llms.txt  
> Use this file to discover all available pages before exploring further. 

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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 Workers AI events

#### `batch.queued`

Triggered when a batch request is queued.

**Example:**

```
{  "type": "cf.workersAi.model.batch.queued",  "source": {    "type": "workersAi.model",    "modelName": "@cf/baai/bge-base-en-v1.5"  },  "payload": {    "requestId": "req-12345678-90ab-cdef-1234-567890abcdef"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `batch.succeeded`

Triggered when a batch request has completed.

**Example:**

```
{  "type": "cf.workersAi.model.batch.succeeded",  "source": {    "type": "workersAi.model",    "modelName": "@cf/baai/bge-base-en-v1.5"  },  "payload": {    "requestId": "req-12345678-90ab-cdef-1234-567890abcdef"  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

#### `batch.failed`

Triggered when a batch request has failed.

**Example:**

```
{  "type": "cf.workersAi.model.batch.failed",  "source": {    "type": "workersAi.model",    "modelName": "@cf/baai/bge-base-en-v1.5"  },  "payload": {    "requestId": "req-12345678-90ab-cdef-1234-567890abcdef",    "message": "Model execution failed",    "internalCode": 5001,    "httpCode": 500  },  "metadata": {    "accountId": "f9f79265f388666de8122cfb508d7776",    "eventSubscriptionId": "1830c4bb612e43c3af7f4cada31fbf3f",    "eventSchemaVersion": 1,    "eventTimestamp": "2025-05-01T02:48:57.132Z"  }}
```

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