# DeepL API

Translation

World's most accurate translator — 30+ languages with natural output.

DeepL provides industry-leading machine translation. Translate text, documents, and glossaries across 30+ languages with the most natural-sounding output available.

### Details

**Auth Type**  
API Key (DeepL-Auth-Key header)

**Rate Limit**  
500,000 chars/month (free)

**Pricing**  
Free: 500K chars/mo

### Step 1: Save your provider key

This is **NOT** your Callio key. Enter the API key from the provider's dashboard (e.g. OpenAI/SendGrid).

**Save Provider Key**

### API Key (DeepL-Auth-Key header)

Sign up at deepl.com/pro and get your API key.

## Getting Started

1

### Try It Instantly

Click "Try It" above to test the API in the playground

2

### Add to Your Agent

Click "Add to Agent" to get your API key and integrate

## Common Use Cases

- Text translation  
- Document translation  
- Multilingual content  
- Localization  
- Customer support

## 💻 Code Examples

Get started quickly with these code examples in your favorite language

### cURL

```
curl -X GET \
  'https://www.callio.dev/api/proxy/deepl/forward?target=https%3A%2F%2Fapi-free.deepl.com%2Fv2%2Fendpoint' \
  -H 'Authorization: Bearer YOUR_CALLIO_KEY' \
  -H 'Content-Type: application/json'
```

💡 **Tip:** Replace `YOUR_CALLIO_KEY` with your actual Callio API key from the dashboard.

## Ready to integrate DeepL API?

Test endpoints live or generate your API key and start building in minutes.