> For the complete documentation index, see [llms.txt](https://docs.layerlens.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.layerlens.ai/2.-get-started/install.md).

# Install

Install the Stratix Python SDK from the LayerLens package registry.

## Requirements

* Python 3.8 or higher
* pip

## Install

```bash
pip install layerlens --extra-index-url https://sdk.layerlens.ai/package
```

## Verify

```python
import layerlens
print(layerlens.__version__)
```

You should see `1.3.0` (or later).

## Set your API key

Get an API key from `stratix.layerlens.ai/settings/api-keys`. Then export:

```bash
export LAYERLENS_STRATIX_API_KEY="your-api-key"
```

Or pass it explicitly when creating the client:

```python
from layerlens import Stratix
client = Stratix(api_key="your-api-key")
```

## Virtual environment (recommended)

```bash
python -m venv.venv
# Linux/macOS:
source.venv/bin/activate
# Windows PowerShell:
#.venv\Scripts\Activate.ps1

pip install layerlens --extra-index-url https://sdk.layerlens.ai/package
```

## Upgrade

```bash
pip install --upgrade layerlens --extra-index-url https://sdk.layerlens.ai/package
```

## Dependencies installed

* `httpx` — HTTP client
* `pydantic` — data validation
* `requests` — file upload (presigned S3 URLs)

## Where to next

* [First evaluation via SDK](/2.-get-started/first-eval-via-sdk.md)
* [SDK authentication reference](/2.-get-started/sdk.md)
* [SDK API reference](/2.-get-started/sdk.md)