---
title: "License"
canonical_url: "https://www.nutrient.io/api/python/license/"
md_url: "https://www.nutrient.io/api/python/license.md"
last_updated: "2026-06-08T08:09:41.018Z"
description: "Manages licensing for the Nutrient Native SDK. Provides methods to register license keys and trace licensed features in evaluation mode (without registering a …"
---

Manages licensing for the Nutrient Native SDK. Provides methods to register license keys and trace licensed features in evaluation mode (without registering a key).

```python

from nutrient_sdk import License

```

## Construction

```python

License()

```

Creates a new `License` instance with default settings.

## Class Methods

### register_key

```python

@classmethod
def register_key(cls, key: str) -> None

```

Unlocks the SDK with a commercial or a demo license key. You can subsequently use this method to unlock the underlying implementation.

**Parameters:**

| Name  | Type  | Description                  |
| ----- | ----- | ---------------------------- |
| `key` | `str` | The license key to register. |

---

### trace_features

```python

@classmethod
def trace_features(cls) -> str

```

When the SDK is in trial mode, this method returns a string that lists the features that have been evaluated during the session.

**Returns:** `str`

---

---

## Related pages

- [Document](/api/python/document.md)
- [Open a PDF and convert it to a Word document](/api/python.md)
- [Vision](/api/python/vision.md)