---
title: Cartesia
description: Route Cartesia text-to-speech requests through AI Gateway for observability and control.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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

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# Cartesia

[Cartesia ↗](https://docs.cartesia.ai/) provides advanced text-to-speech services with customizable voice models.

## Endpoint

```
https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/cartesia
```

## URL Structure

When making requests to Cartesia, replace `https://api.cartesia.ai/v1` in the URL you are currently using with `https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/cartesia`.

## Prerequisites

When making requests to Cartesia, ensure you have the following:

* Your AI Gateway Account ID.
* Your AI Gateway gateway name.
* An active Cartesia API token.
* The model ID and voice ID for the Cartesia voice model you want to use.

## Example

### cURL

Request

```
curl https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/cartesia/tts/bytes \  --header 'Content-Type: application/json' \  --header 'Cartesia-Version: 2024-06-10' \  --header 'X-API-Key: {cartesia_api_token}' \  --data '{    "transcript": "Welcome to Cloudflare - AI Gateway!",    "model_id": "sonic-english",    "voice": {        "mode": "id",        "id": "694f9389-aac1-45b6-b726-9d9369183238"    },    "output_format": {        "container": "wav",        "encoding": "pcm_f32le",        "sample_rate": 44100    }}
```

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```