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

# Environment Variable Setup

> How to set your API Key environment variable

All Lytix SDKs use the `LX_API_KEY` environment variable to authenticate with the Lytix platform.

You can set this environment variable in your local development environment by adding it to your `.env` file.

```bash
export LX_API_KEY=<your-api-key>
```

You can now continue to the [NodeJS](/nodejs-quickstart) or [Python](/python-quickstart) Quickstart.