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

# Alt Text Generator API

> Generate alt text programmatically using the AltTextLab REST API.

The AltTextLab API lets you generate alt text for images at scale — from a single request to millions of assets.

## Base URL

```
https://app.alttextlab.com/api/v1
```

## Capabilities

* Generate alt text for any public image URL
* 130+ output languages
* Customizable writing styles
* E-commerce mode with product metadata
* Context fields to improve accuracy for ambiguous images

## Common use cases

* Content Management Systems
* E-commerce product catalogs
* Blog automation and dynamic media feeds
* No-code tools (Zapier, Make)
* Custom pipeline integrations

## Rate limits

| Window     | Limit            |
| ---------- | ---------------- |
| Per second | 5 requests       |
| Per minute | 120 requests     |
| Per day    | 100,000 requests |

Exceeding a limit returns a rate-limit error. Limits reset automatically after their window expires.

<Note>
  If you need a higher request volume, [contact our support team](mailto:support@alttextlab.com).
</Note>

## Getting started

<CardGroup cols={2}>
  <Card title="API Key" icon="key" href="/api/api-key">
    Create and manage your API keys.
  </Card>

  <Card title="Authentication" icon="lock" href="/api/authentication">
    How to authenticate every request.
  </Card>

  <Card title="Alt text generation" icon="wand-magic-sparkles" href="/api/alt-text-generation">
    The main endpoint — request parameters and response format.
  </Card>

  <Card title="Supported languages" icon="globe" href="/features/supported-languages">
    Full list of 130+ language codes.
  </Card>
</CardGroup>