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

# CloudflareWorkersAI integration

> Integrate with the CloudflareWorkersAI LLM using LangChain JavaScript.

This will help you get started with Cloudflare Workers AI text completion models (LLMs) using LangChain. For detailed documentation on `CloudflareWorkersAI` features and configuration options, please refer to the [API reference](https://reference.langchain.com/javascript/langchain-cloudflare/CloudflareWorkersAI).

## Overview

### Integration details

| Class                                                                                                        | Package                                                            | Local | Serializable | PY support |                                               Downloads                                               |                                               Version                                              |
| :----------------------------------------------------------------------------------------------------------- | :----------------------------------------------------------------- | :---: | :----------: | :--------: | :---------------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------------------------: |
| [`CloudflareWorkersAI`](https://reference.langchain.com/javascript/langchain-cloudflare/CloudflareWorkersAI) | [`@langchain/cloudflare`](https://npmjs.com/@langchain/cloudflare) |   ❌   |       ✅      |      ❌     | ![NPM - Downloads](https://img.shields.io/npm/dm/@langchain/cloudflare?style=flat-square\&label=%20&) | ![NPM - Version](https://img.shields.io/npm/v/@langchain/cloudflare?style=flat-square\&label=%20&) |

## Setup

To access Cloudflare Workers AI models you'll need to create a Cloudflare account, get an API key, and install the `@langchain/cloudflare` integration package.

### Credentials

Head [to this page](https://developers.cloudflare.com/workers-ai/) to sign up to Cloudflare and generate an API key. Once you've done this, set your credentials in the environment:

```bash theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
export CLOUDFLARE_ACCOUNT_ID="your-account-id"
export CLOUDFLARE_API_TOKEN="your-api-token"
```

### Installation

The LangChain Cloudflare integration lives in the `@langchain/cloudflare` package:

<CodeGroup>
  ```bash npm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  npm install @langchain/cloudflare @langchain/core
  ```

  ```bash yarn theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  yarn add @langchain/cloudflare @langchain/core
  ```

  ```bash pnpm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
  pnpm add @langchain/cloudflare @langchain/core
  ```
</CodeGroup>

## Instantiation

Now we can instantiate our model object and generate chat completions:

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
// @lc-docs-hide-cell

// @ts-expect-error Deno is not recognized
const CLOUDFLARE_ACCOUNT_ID = Deno.env.get("CLOUDFLARE_ACCOUNT_ID");
// @ts-expect-error Deno is not recognized
const CLOUDFLARE_API_TOKEN = Deno.env.get("CLOUDFLARE_API_TOKEN");
```

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { CloudflareWorkersAI } from "@langchain/cloudflare";

const llm = new CloudflareWorkersAI({
  model: "@cf/meta/llama-3.1-8b-instruct", // Default value
  cloudflareAccountId: CLOUDFLARE_ACCOUNT_ID,
  cloudflareApiToken: CLOUDFLARE_API_TOKEN,
  // Pass a custom base URL to use Cloudflare AI Gateway
  // baseUrl: `https://gateway.ai.cloudflare.com/v1/{YOUR_ACCOUNT_ID}/{GATEWAY_NAME}/workers-ai/`,
});
```

## Invocation

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const inputText = "Cloudflare is an AI company that "

const completion = await llm.invoke(inputText);
completion
```

```text theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
"Cloudflare is not an AI company, but rather a content delivery network (CDN) and security company. T"... 876 more characters
```

***

## API reference

For detailed documentation of all `CloudflareWorkersAI` features and configurations head to the [API reference](https://reference.langchain.com/javascript/langchain-cloudflare/CloudflareWorkersAI).

***

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